WESTERN MASSACHUSETTS ELECTRIC CO
424B5, 1997-05-20
ELECTRIC SERVICES
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<PAGE>
<PAGE>
INFORMATION  CONTAINED IN THIS  PRELIMINARY PROSPECTUS SUPPLEMENT  IS SUBJECT TO
COMPLETION OR AMENDMENT.
 
PROSPECTUS SUPPLEMENT (SUBJECT TO COMPLETION, ISSUED MAY 19, 1997)
(TO PROSPECTUS DATED DECEMBER 17, 1993)
 
                                  $60,000,000
                     WESTERN MASSACHUSETTS ELECTRIC COMPANY
           FIRST MORTGAGE BONDS, SERIES Z,        %, DUE MAY 1, 2001
                            ------------------------
                     Interest payable May 1 and November 1
                            ------------------------
 
THE SERIES Z  BONDS MATURE ON  MAY 1, 2001.  INTEREST ON THE  SERIES Z BONDS  IS
PAYABLE  SEMIANNUALLY ON MAY 1  AND NOVEMBER 1 BEGINNING  NOVEMBER 1, 1997. THE
 SERIES Z  BONDS WILL  BE REDEEMABLE  IN WHOLE  OR IN  PART, AT  THE OPTION  OF
 WESTERN  MASSACHUSETTS ELECTRIC  COMPANY (THE  COMPANY), AT  ANY TIME,  AT A
   REDEMPTION PRICE  EQUAL TO  THE GREATER  OF (I)  100% OF  THEIR  PRINCIPAL
   AMOUNT  AND (II) THE SUM OF THE PRESENT VALUES OF THE REMAINING SCHEDULED
    PAYMENTS OF PRINCIPAL AND  INTEREST THEREON DISCOUNTED  TO THE DATE  OF
     REDEMPTION  ON A SEMIANNUAL BASIS  (ASSUMING A 360-DAY YEAR CONSISTING
     OF TWELVE 30-DAY MONTHS) AT  THE TREASURY YIELD (AS DEFINED  HEREIN),
      PLUS  IN EACH CASE  ACCRUED INTEREST TO THE  DATE OF REDEMPTION. SEE
      'SUPPLEMENTAL  DESCRIPTION  OF  THE  SERIES  Z  BONDS  --  OPTIONAL
       REDEMPTION'  HEREIN. THE SERIES  Z BONDS WILL  BE REPRESENTED BY A
       GLOBAL SECURITY REGISTERED  IN THE NAME  OF THE DEPOSITORY  TRUST
        COMPANY  (DTC)  OR  ITS NOMINEE.  BOOK-ENTRY  INTERESTS  IN THE
         GLOBAL SECURITY WILL BE SHOWN  ON, AND TRANSFERS THEREOF  WILL
             BE EFFECTED ONLY THROUGH, RECORDS MAINTAINED BY DTC
                                OR ITS NOMINEE.
 
                            ------------------------
 
THESE  SECURITIES HAVE NOT BEEN APPROVED OR DISAPPROVED BY THE SECURITIES AND
   EXCHANGE COMMISSION  OR ANY  STATE SECURITIES  COMMISSION NOR  HAS  THE
      SECURITIES   AND  EXCHANGE  COMMISSION  OR  ANY  STATE  SECURITIES
        COMMISSION PASSED  UPON  THE  ACCURACY OR  ADEQUACY  OF  THIS
           PROSPECTUS    SUPPLEMENT   OR    THE   PROSPECTUS.   ANY
             REPRESENTATION TO THE CONTRARY IS A CRIMINAL OFFENSE.
 
                            ------------------------
 
                   PRICE      % AND ACCRUED INTEREST, IF ANY
 
                            ------------------------
 
<TABLE>
<CAPTION>
                                                                            UNDERWRITING
                                                        PRICE TO           DISCOUNTS AND          PROCEEDS TO
                                                       PUBLIC(1)           COMMISSIONS(2)          COMPANY(3)
                                                  --------------------  --------------------  --------------------
<S>                                               <C>                   <C>                   <C>                   <C>
Per Bond........................................           %                     %                     %
Total...........................................           $                     $                     $
</TABLE>
 
- ------------
 
    (1) Plus accrued interest, if any, from May   , 1997.
 
    (2) The Company has  agreed to  indemnify the  several Underwriters  against
        certain  liabilities, including liabilities under  the Securities Act of
        1933.
 
    (3) Before deducting expenses payable by the Company estimated at $200,000.
 
                            ----------------------------
 
     The Series Z Bonds are offered by the Underwriters, subject to prior  sale,
when, as and if issued  by the Company and  accepted  by  the  Underwriters  and
subject to approval of certain  legal  matters  by  Winthrop,  Stimson, Putnam &
Roberts, counsel for the Underwriters. It  is  expected  that  delivery  of  the
Series  Z  Bonds will be made on or about May   , 1997  through  the  book-entry
facilities of DTC, against  payment therefor in immediately available funds.
 
                            ------------------------
MORGAN STANLEY & CO.                                        SALOMON BROTHERS INC
   INCORPORATED
 
May , 1997

<PAGE>
<PAGE>
     CERTAIN  PERSONS PARTICIPATING IN THIS  OFFERING MAY ENGAGE IN TRANSACTIONS
THAT STABILIZE, MAINTAIN OR  OTHERWISE AFFECT THE PRICE  OF THE SERIES Z  BONDS.
SPECIFICALLY, THE UNDERWRITERS MAY OVERALLOT IN CONNECTION WITH THE OFFERING AND
MAY  BID  FOR, AND  PURCHASE,  THE SERIES  Z  BONDS IN  THE  OPEN MARKET.  FOR A
DESCRIPTION OF THESE ACTIVITIES, SEE 'UNDERWRITERS.'
 
                              SUMMARY INFORMATION
 
     The following  material is  qualified in  its entirety  by, and  should  be
considered  in  conjunction  with,  the  information  and  financial  statements
appearing  elsewhere  in  this   Prospectus  Supplement  and  the   accompanying
Prospectus, and in the documents and information incorporated by reference.
 
                                  THE OFFERING
 
<TABLE>
<S>                                         <C>
Securities Offered........................  $60,000,000 principal amount of First Mortgage Bonds, Series Z,
                                                 % (Series Z Bonds).
Maturity..................................  May 1, 2001
Interest Payment Dates....................  May 1 and November 1
</TABLE>
 
                         SELECTED FINANCIAL INFORMATION
                   (THOUSANDS, EXCEPT PERCENTAGES AND RATIOS)
 
<TABLE>
<CAPTION>
                                                                                              TWELVE MONTHS
                                                           YEAR ENDED DECEMBER 31,                ENDED
                                                    --------------------------------------      MARCH 31,
                                                       1994          1995          1996           1997
                                                    ----------    ----------    ----------    -------------
                                                                                               (UNAUDITED)
<S>                                                 <C>           <C>           <C>           <C>
Income Summary:
     Operating Revenues..........................   $  421,477    $  420,434    $  421,337     $   412,594
     Operating Income............................   $   70,940    $   63,064    $   26,023     $    16,196
     Net Income (loss)...........................   $   49,457    $   39,133    $    3,922     $    (6,030)
Total Assets (end of period).....................   $1,183,618    $1,142,346    $1,190,137     $ 1,173,761
</TABLE>
 
<TABLE>
<CAPTION>
                                                                                AS OF MARCH 31, 1997
                                                                      -----------------------------------------
                                                                                  (UNAUDITED)         % OF
                                                                                      AS            ADJUSTED
                                                                       ACTUAL     ADJUSTED(a)    CAPITALIZATION
                                                                      --------    -----------    --------------
<S>                                                                   <C>         <C>            <C>
Capitalization Summary:
     Long-Term Debt (including current maturities).................   $335,243     $ 395,243           57.0%
     Preferred Stock Subject to Mandatory Redemption (including
       portion to be redeemed within one year).....................     21,000        21,000            3.0
     Preferred Stock Not Subject to Mandatory Redemption...........     20,000        20,000            2.9
     Common Stockholder's Equity...................................    257,201       257,201           37.1
                                                                      --------    -----------        ------
     Total Capitalization..........................................   $633,444     $ 693,444          100.0%
                                                                      --------    -----------        ------
                                                                      --------    -----------        ------
</TABLE>
 
<TABLE>
<CAPTION>
                                                                                               TWELVE MONTHS
                                                             YEAR ENDED DECEMBER 31,               ENDED
                                                       ------------------------------------      MARCH 31,
                                                       1992    1993    1994    1995    1996         1997
                                                       ----    ----    ----    ----    ----     -------------
                                                                                                (UNAUDITED)
 
<S>                                                    <C>     <C>     <C>     <C>     <C>     <C>
Ratio of Earnings to Fixed Charges..................   2.43    2.81    3.54    2.65    1.26         0.78(b)
</TABLE>
 
- ------------
 
 (a) Adjusted  to reflect the  proposed sale of $60  million principal amount of
     Series Z Bonds.
 
 (b) For the twelve-month period ending March 31, 1997, the ratio of earnings to
     fixed  charges  reflects  the   effects  of  additional  costs,   including
     replacement power costs, associated with the outages at the three Millstone
     units. For the period, earnings were inadequate to cover fixed charges; the
     additional  earnings  required  to bring  the  ratio of  earnings  to fixed
     charges to  1.0 for  this  period would  have  been $6,886,000.  See  'Risk
     Factors.'
 
                                      S-2
 
<PAGE>
<PAGE>
                                  RISK FACTORS
 
NUCLEAR PLANT OUTAGES AND LIQUIDITY
 
     The Company faced an extremely difficult year in 1996 and continues to face
significant  financial, regulatory and  legal challenges in 1997  as a result of
the prolonged outages at the  three Millstone nuclear units (Millstone)  located
in   Waterford,  Connecticut.  These  outages  have  resulted  in  significantly
increased expenditures for replacement power  and work undertaken at  Millstone.
The  length of the outages  and the high costs  of the recovery efforts weakened
the Company's 1996 earnings, balance sheet  and cash flows and continue to  have
an adverse impact on the Company's financial condition.
 
     The  Company  currently anticipates  having  Millstone 3  ready  to restart
around the end of the third quarter  of 1997, Millstone 2 in the fourth  quarter
of  1997, and Millstone 1 in the first  quarter of 1998. Restart of each unit is
contingent upon, among other things,  the affirmative vote of the  Commissioners
of the Nuclear Regulatory Commission, which could occur by mid-December 1997 for
Millstone 3. Management hopes that Millstone 3 can begin operating by the end of
1997.  There can be no assurances, however, that the Company's expectations will
be met. If, for example, the return to  service of one or more of the  Millstone
plants  is  delayed  substantially or  if  the Northeast  Utilities  (NU) system
encounters additional  significant costs  or other  significant deviations  from
management's  current assumptions, resulting in  the Company's inability to meet
its cash requirements,  management would  take actions  to reduce  costs and  to
obtain  additional sources  of funds. The  availability of these  funds would be
dependent upon the  general market  conditions and  the NU  system's credit  and
financial condition at the time.
 
     The combination of higher expenditures and uncertainty surrounding when the
units  will return  to service has  made it  necessary to ensure  that access to
adequate cash  levels  will  be  available for  the  duration  of  the  outages.
Currently,  the Company is seeking regulatory approval for amendments to certain
of its credit arrangements in order  to provide borrowing capability beyond  May
30,  1997; there can be  no assurance that such approval  will be granted or, if
granted, that the credit arrangements will provide required liquidity during the
outages. Additionally,  it  is  possible  that  negative  operating  results  or
regulatory  developments at  other companies in  the NU  system could negatively
affect the Company's access to the financial markets.
 
     Management took  various  actions  during 1996  to  address  the  Company's
nuclear  program and liquidity  issues; however, 1997 continues  to be a serious
challenge in these areas. For  more information regarding the Company's  nuclear
regulatory  challenges and financial and legal issues related thereto, see 'Item
1. Business --  Overview of  Nuclear and Related  Financial Matters,'  'Electric
Operations   --  Nuclear  Plant  Performance   and  Regulatory  Oversight,'  and
'Financing Program -- Financing Limitations,'  'Item 3. Legal Proceedings,'  and
'Item 7. Management's Discussion and Analysis of Financial Condition and Results
of  Operations' in the Company's 1996 Annual  Report on Form 10-K, its Quarterly
Report on Form 10-Q for the quarter ending March 31, 1997 and its Current Report
on Form 8-K dated April 11, 1997, which are incorporated by reference herein.
 
INDUSTRY RESTRUCTURING AND COMPETITION
 
     The Company also  faces future  uncertainty with the  rapidly moving  trend
toward  industry  restructuring  and  increasing  retail  competition.  For more
information  regarding   electric   industry   restructuring,   see   'Item   1.
Business -- Competition and Cost Recovery' and 'Rates' and 'Item 7. Management's
Discussion and Analysis of Financial Condition and Results of Operations' in the
Company's  1996 Annual Report on Form 10-K and its Quarterly Report on Form 10-Q
for the  quarter ending  March 31,  1997, which  are incorporated  by  reference
herein.
 
                 SUPPLEMENTAL DESCRIPTION OF THE SERIES Z BONDS
 
     This  Prospectus Supplement  relates to the  issue and  sale of $60,000,000
principal amount of First Mortgage Bonds, Series Z,   %, due May 1, 2001 (Series
Z Bonds) of Western Massachusetts Electric  Company (the Company), which are  to
be    offered    and    sold   under    the    accompanying    Prospectus   (the
 
                                      S-3
 
<PAGE>
<PAGE>
Prospectus). The  section of  the Prospectus  entitled 'Description  of the  New
Bonds'  contains detailed  information about the  New Bonds. Below  is set forth
supplemental information that more specifically  relates to the Series Z  Bonds.
The  following  supplemental information  is qualified  in  its entirety  by the
information appearing in the Prospectus, to which reference is made.
 
THE TRUSTEE
 
     In 1995,  State Street  Bank  and Trust  Company of  Boston,  Massachusetts
succeeded The First National Bank of Boston as Trustee under the Indenture.
 
USE OF PROCEEDS
 
     The  net proceeds  from the issue  and sale of  the Series Z  Bonds will be
used, together with funds from other sources, to repay short-term debt that  has
been  incurred  to refinance  or  refund debt  (including  $14,700,000 principal
amount of the  Company's Series F,  5 3/4% First  Mortgage Bonds) and  preferred
stock  (including Dutch  Auction Rate  Transferable Securities)  and for general
working capital purposes, including costs associated with the current outages at
the Millstone nuclear units. As of  May 14, 1997, the Company had  approximately
$89,700,000 of short-term debt outstanding.
 
GENERAL
 
     The  Series Z Bonds will be issued  under a Supplemental Indenture dated as
of May 1, 1997 and will bear interest from the date of original issuance at  the
rate of        % per annum. Interest will be payable semi-annually in arrears on
May  1 and November 1  of each year, commencing  November 1, 1997, to registered
owners as of the close of business on the April 15 or October 15 next  preceding
the interest payment dates, or if April 15 or October 15 falls on a day on which
banks  are authorized  to close  in Boston, Massachusetts,  then as  of the next
preceding banking day.
 
     The Series Z Bonds will be issued initially under a book-entry only  system
in  the form of one fully registered certificate, registered in the name of Cede
& Co., as registered bondholder and nominee of The Depository Trust Company, New
York, New York. DTC will act as securities depository for the Series Z Bonds. So
long as Cede & Co., as nominee of  DTC, or any successor nominee of DTC, is  the
registered  bondholder  of the  Series  Z Bonds,  references  herein and  in the
Prospectus to the bondholders or registered  owners of Series Z Bonds will  mean
Cede  & Co. or such  successor nominee. See 'Book-Entry  Only System' herein for
certain information regarding DTC and the book-entry only system.
 
     See 'The Indenture  and the  Trustee' and  'General Terms  of Bonds'  under
'Description of the New Bonds' in the Prospectus.
 
OPTIONAL REDEMPTION
 
     The Series Z Bonds will be redeemable in whole or in part, at the option of
the  Company at any time, at a redemption price equal to the greater of (i) 100%
of their  principal  amount and  (ii)  the sum  of  the present  values  of  the
remaining scheduled payments of principal and interest thereon discounted to the
date  of redemption on a semiannual basis (assuming a 360-day year consisting of
twelve 30-day months) at the Treasury Yield, plus in each case accrued  interest
to the date of redemption (the Redemption Date).
 
     'Treasury  Yield' means, with respect to  any Redemption Date, the rate per
annum equal to  the semiannual equivalent  yield to maturity  of the  Comparable
Treasury Issue, assuming a price for the Comparable Treasury Issue (expressed as
a percentage of its principal amount) equal to the Comparable Treasury Price for
such redemption date.
 
     'Comparable  Treasury  Issue'  means the  United  States  Treasury security
selected by an Independent Investment Banker having a maturity comparable to the
remaining term of  the Series Z  Bonds that would  be utilized, at  the time  of
selection and in accordance with customary financial
 
                                      S-4
 
<PAGE>
<PAGE>
practice,  in  pricing new  issues of  corporate  debt securities  of comparable
maturity to the remaining term of the Series Z Bonds.
 
     'Independent Investment Banker' means Morgan Stanley & Co. Incorporated or,
if such firm is unwilling or unable to select the Comparable Treasury Issue,  an
independent  investment banking institution of national standing selected by the
Company and appointed by the Trustee.
 
     'Comparable Treasury Price' means, with respect to any Redemption Date, (i)
the average  of the  bid and  asked  prices for  the Comparable  Treasury  Issue
(expressed  in each case as  a percentage of its  principal amount) on the third
business day  preceding  such  Redemption  Date,  as  set  forth  in  the  daily
statistical  release (or any successor release) published by the Federal Reserve
Bank of  New  York and  designated  'Composite  3:30 p.m.  Quotations  for  U.S.
Government Securities' or (ii) if such release (or any successor release) is not
published  or does not contain such prices on such business day, (A) the average
of the  Reference Treasury  Dealer Quotations  for such  Redemption Date,  after
excluding  the highest and lowest such  Reference Treasury Dealer Quotations, or
(B) if the Trustee obtains fewer than four Reference Treasury Dealer Quotations,
the average of all such Quotations.
 
     'Reference  Treasury  Dealer  Quotations'  means,  with  respect  to   each
Reference Treasury Dealer and any Redemption Date, the average, as determined by
the  Trustee, of  the bid  and asked  prices for  the Comparable  Treasury Issue
(expressed in  each case  as a  percentage of  its principal  amount) quoted  in
writing  to the Trustee  by such Reference  Treasury Dealer at  5:00 p.m. on the
third business day preceding such Redemption Date.
 
     'Reference  Treasury  Dealer'   means  each   of  Morgan   Stanley  &   Co.
Incorporated,  Salomon  Brothers Inc  and  another Primary  Treasury  Dealer (as
defined herein) at the option of the Company, provided, however, that if any  of
the  foregoing shall cease to be a  primary U.S. Government Securities dealer in
New York City (a Primary Treasury Dealer), the Company shall substitute therefor
another Primary Treasury Dealer.
 
     Holders of Series Z Bonds to  be redeemed will receive notice thereof  sent
by  first-class mail at  least 30 and  not more than  60 days prior  to the date
fixed for redemption.
 
DIVIDEND RESTRICTIONS
 
     The Supplemental Indenture under  which the Series Z  Bonds will be  issued
does  not contain any provisions restricting the Company's ability to pay common
dividends. While the Company's  ability to pay such  dividends is restricted  by
the  terms of  the Company's Series  G Bonds,  these bonds will  mature March 1,
1998. See  'Description  of the  New  Bonds  -- Dividend  Restrictions'  in  the
Prospectus.  Under the Series G provision,  unrestricted earned surplus at March
31, 1997 amounted to $57,949,978.
 
EARNINGS COVERAGE
 
     The  section  of   the  Prospectus   entitled  'Description   of  the   New
Bonds   --  Issuance  of  Additional   Bonds;  Earnings  Coverages'  sets  forth
information about the  earnings coverage provisions  of the Company's  Indenture
that must be satisfied for the Company to issue additional first mortgage bonds,
unless  the issue is a certain type of refunding issue pursuant to SS3.04 of the
Indenture. Because the Company is issuing the Series Z Bonds pursuant to  SS3.04
in an aggregate principal amount equal to an aggregate principal amount of Bonds
that  have been  previously redeemed  or retired  and the  total annual interest
requirements of  the Series  Z Bonds  do not  exceed the  total annual  interest
requirements  of such Bonds  that have been previously  redeemed or retired, the
Company is  not required  to satisfy  the earnings  coverage provisions  of  the
Indenture  to issue the Series  Z Bonds. The Company  currently does not satisfy
the earnings coverage requirement (as defined in the Indenture).
 
ISSUANCE OF ADDITIONAL BONDS BASED ON RETIRED OR REDEEMED BONDS
 
     In the future,  the Company may  seek to amend  SS3.04(h) of the  Indenture
which  requires the Company  to satisfy the earnings  coverage provisions of the
Indenture to issue additional first mortgage
 
                                      S-5
 
<PAGE>
<PAGE>
bonds  based  on  retired  or  redeemed  bonds  if  the  total  annual  interest
requirements  of  the  Bonds to  be  issued  exceeds the  total  annual interest
requirements of the Bonds retired or  redeemed. This amendment of the  Indenture
would  provide that, under  SS3.04(h), the Company would  be required to satisfy
the earnings coverage provision  of the Indenture only  if (i) the total  annual
interest requirements of the Bonds to be issued exceed the total annual interest
requirements  of  Bonds to  be retired  or redeemed  and (ii)  such Bonds  to be
retired or redeemed are then outstanding and mature more than two years from the
issuance of the  additional Bonds.  The Supplemental Indenture  under which  the
Series  Z Bonds  will be issued  will provide that  the holders of  the Series Z
Bonds will be deemed to have given their written consent to such amendment.  The
consent  of 70  percent in  principal amount of  all Bonds  outstanding would be
required to effect  the amendment.  To date, no  other series  of the  Company's
Bonds has so consented.
 
OTHER RESTRICTIONS UPON ISSUANCE OF DEBT
 
     In addition to the foregoing restrictions, there are additional limitations
upon  the creation and/or issuance by  the Company of long-term debt securities.
Under the Company's revolving bank loan agreement, the lenders are not  required
to  make additional loans or the maturity  of indebtedness can be accelerated if
the Company does not  meet an equity  ratio that requires,  in effect, that  the
Company's  common  equity (as  defined)  be at  least  33 percent  of  its total
capitalization through December 31, 1997 and 34 percent thereafter. At March 31,
1997, WMECO's common equity ratio was  37.4 percent. The Company is  negotiating
an  amendment to the agreement, which is  expected, among other things, to lower
the Company's common equity ratio requirement to 31 percent through December 31,
1997 and  32 percent  thereafter. This  amendment would  also change  a  current
requirement  in the  agreement that the  Company's ratio of  operating income to
interest expense be at  least 1.50 to 1  through June 30, 1997,  2.25 to 1  from
July  1, 1997 through  the end of 1997  and 2.50 to  1 thereafter. The amendment
would remove the requirement entirely until the fourth quarter of 1997, and make
the requirement 1.25 to 1 for the first  two quarters of 1998, 2.0 to 1 for  the
third  quarter of 1998 and 2.5 to 1 thereafter. At March 31, 1997, the Company's
interest coverage ratio was 1.5 to 1.
 
                             BOOK-ENTRY ONLY SYSTEM
 
     The description  which follows  of the  procedures and  recordkeeping  with
respect  to beneficial  ownership interests in  the Series Z  Bonds, payments of
principal of, and premium, if  any, and interest on, the  Series Z Bonds to  DTC
and  its  Participants or  Beneficial  Owners, in  each  case as  defined below,
confirmation and  transfer of  beneficial ownership  interests in  the Series  Z
Bonds  and other related transactions by and among DTC, the DTC Participants and
Beneficial Owners is based solely on information furnished by DTC.
 
     DTC is a limited-purpose trust company organized under the New York Banking
Law, a 'banking organization' within the meaning of the New York Banking Law,  a
member  of  the  Federal Reserve  System,  a 'clearing  corporation'  within the
meaning of  the  New York  Uniform  Commercial  Code, and  a  'clearing  agency'
registered  pursuant to the provisions of Section 17A of the Securities Exchange
Act of 1934. DTC holds  securities that its participants (Participants)  deposit
with  DTC. DTC also facilitates the  settlement among Participants of securities
transactions, such as  transfers and  pledges, in  deposited securities  through
electronic  computerized book-entry  changes in  Participants' accounts, thereby
eliminating the need  for physical movement  of securities certificates.  Direct
Participants  (Direct  Participants)  include  securities  brokers  and dealers,
banks, trust companies, clearing  corporations and certain other  organizations.
DTC  is owned by a number  of its Direct Participants and  by the New York Stock
Exchange, Inc., the American Stock  Exchange, Inc. and the National  Association
of Securities Dealers, Inc. Access to the DTC system is also available to others
such  as securities  brokers and dealers,  banks and trust  companies that clear
through or maintain a custodial  relationship with a Direct Participant,  either
directly  or indirectly (Indirect Participants). The rules applicable to DTC and
its Participants are on file with the Securities and Exchange Commission (SEC).
 
                                      S-6
 
<PAGE>
<PAGE>
     Purchases of Series Z Bonds under the DTC system must be made by or  though
Direct Participants, which will receive a credit for the Series Z Bonds on DTC's
records.  The  ownership interest  of each  actual purchaser  of Series  Z Bonds
(Beneficial Owner)  is  in  turn to  be  recorded  on the  Direct  and  Indirect
Participants'  records. Beneficial Owners will  not receive written confirmation
from DTC  of their  purchase,  but Beneficial  Owners  are expected  to  receive
written  confirmations providing details of the transaction, as well as periodic
statements of their holdings,  from the Direct  or Indirect Participant  through
which  the Beneficial Owner entered into the transaction. Transfers of ownership
interests in the Series Z  Bonds are to be accomplished  by entries made on  the
books  of Participants acting on behalf  of Beneficial Owners. Beneficial Owners
will not  receive certificates  representing their  ownership interests  in  the
Series  Z Bonds, except in  the event that use of  the book-entry system for the
Series Z Bonds is discontinued.  SO LONG AS CEDE &  CO., AS NOMINEE FOR DTC,  IS
THE SOLE HOLDER OF THE SERIES Z BONDS, THE TRUSTEE SHALL TREAT CEDE & CO. AS THE
ONLY  HOLDER  OF  THE SERIES  Z  BONDS  FOR ALL  PURPOSES  UNDER  THE INDENTURE,
INCLUDING RECEIPT OF ALL PRINCIPAL OF, AND PREMIUM, IF ANY, AND INTEREST ON SUCH
BONDS, RECEIPT OF NOTICES, AND VOTING AND REQUESTING OR DIRECTING THE TRUSTEE TO
TAKE OR NOT TO TAKE, OR CONSENTING TO, CERTAIN ACTIONS UNDER THE INDENTURE.
 
     To facilitate  subsequent  transfers,  all  Series  Z  Bonds  deposited  by
Participants  with DTC are registered in  the name of DTC's partnership nominee,
Cede & Co. The deposit of Series Z Bonds with DTC and their registration in  the
name  of  Cede  & Co.  effect  no change  in  beneficial ownership.  DTC  has no
knowledge of the actual Beneficial Owners  of the Series Z Bonds; DTC's  records
reflect  only the  identity of  the Direct  Participants to  whose accounts such
Series Z Bonds are credited, which may or may not be the Beneficial Owners.  The
Participants  will remain responsible  for keeping account  of their holdings on
behalf of their customers.
 
     Conveyance  of  notices   and  other  communications   by  DTC  to   Direct
Participants,  by Direct  Participants to  Indirect Participants,  and by Direct
Participants and Indirect Participants to Beneficial Owners will be governed  by
arrangements  among them, subject to any statutory or regulatory requirements as
may be in effect from time to time.
 
     Redemption notices, if any, shall be sent to Cede & Co. If less than all of
the Series Z Bonds are being redeemed, DTC's practice is to determine by lot the
amount of the interest of each Direct Participant in such issue to be redeemed.
 
     Neither DTC nor Cede & Co. will consent or vote with respect to the  Series
Z  Bonds. Under its usual procedures, DTC  mails an Omnibus Proxy to the Company
as soon as  possible after the  record date.  The Omnibus Proxy  assigns Cede  &
Co.'s consenting or voting rights to those Direct Participants to whose accounts
the  Series Z  Bonds are credited  on the  record date (identified  in a listing
attached to the Omnibus Proxy).
 
     Principal of, and premium,  if any, and interest  payments on the Series  Z
Bonds  will be  made to  DTC. DTC's practice  is to  credit Direct Participants'
accounts on  the applicable  payment date  in accordance  with their  respective
holdings  shown on DTC's records  unless DTC has reason  to believe that it will
not receive payment on such date. Payments by Participants to Beneficial  Owners
will  be governed  by standing instructions  and customary practices,  as is the
case with  securities held  for the  accounts  of customers  in bearer  form  or
registered  in 'street name,' and will be the responsibility of such Participant
and not  of  DTC, the  Trustee  or the  Company,  subject to  any  statutory  or
regulatory  requirements  as may  be in  effect  from time  to time.  Payment of
principal, and premium, if any, and interest to DTC is the responsibility of the
Company or the  Trustee (with funds  provided by the  Company), disbursement  of
such  payments to  Direct Participants shall  be the responsibility  of DTC, and
disbursement  of  such  payments   to  the  Beneficial   Owners  shall  be   the
responsibility of Direct and Indirect Participants.
 
     DTC  may discontinue providing  its services as  securities depository with
respect to the Series  Z Bonds at  any time by giving  reasonable notice to  the
Company  or the Trustee. Under such circumstances, in the event that a successor
securities depository is not obtained, individual bond certificates are required
to be printed and delivered.
 
                                      S-7
 
<PAGE>
<PAGE>
     The Company  may decide  to discontinue  use of  the system  of  book-entry
transfers  through DTC  (or a successor  securities depository).  In that event,
individual bond certificates will be printed and delivered.
 
     The information in this section concerning DTC and DTC's book-entry  system
has  been  obtained  from  sources  that the  Company  believes  to  be reliable
(including DTC),  but  the Company  takes  no responsibility  for  the  accuracy
thereof.
 
     THE  COMPANY, THE  UNDERWRITERS AND THE  TRUSTEE HAVE  NO RESPONSIBILITY OR
OBLIGATION TO THE DTC PARTICIPANTS OR THE BENEFICIAL OWNERS WITH RESPECT TO  (A)
THE  ACCURACY OF ANY RECORDS  MAINTAINED BY DTC OR  ANY DTC PARTICIPANT, (B) THE
PAYMENT BY ANY  DTC PARTICIPANT OF  ANY AMOUNT  DUE TO ANY  BENEFICIAL OWNER  IN
RESPECT  OF THE PRINCIPAL OF, AND PREMIUM, IF ANY, AND INTEREST ON, THE SERIES Z
BONDS; (C) THE DELIVERY OR TIMELINESS OF DELIVERY BY DTC TO ANY DTC  PARTICIPANT
OR  BY  ANY DTC  PARTICIPANT  TO ANY  BENEFICIAL OWNER  OF  ANY NOTICE  WHICH IS
REQUIRED OR PERMITTED UNDER THE TERMS OF THE INDENTURE TO BE GIVEN TO HOLDERS OF
THE SERIES Z BONDS; OR (D) ANY OTHER ACTION TAKEN BY DTC OR ITS NOMINEE, CEDE  &
CO., AS HOLDER OF THE SERIES Z BONDS.
 
                INCORPORATION OF CERTAIN DOCUMENTS BY REFERENCE
 
     Reference  is made to 'Incorporation of  Certain Documents by Reference' in
the Prospectus.  At  the  date  of this  Prospectus  Supplement,  the  documents
incorporated by reference or deemed to be incorporated by reference and filed in
1997  consist of  the Company's Annual  Report on  Form 10-K for  the year ended
December 31, 1996,  its Quarterly  Report on Form  10-Q for  the quarter  ending
March  31, 1997  and its  Current Report on  Form 8-K  dated April  11, 1997. In
addition, the  SEC  maintains  a  Web site  that  contains  reports,  proxy  and
information statements and other information regarding reporting companies under
the  Securities  Exchange Act  of  1934 that  file  electronically with  the SEC
(including the Company) at http://www.sec.gov.
 
                                  UNDERWRITERS
 
     Under the terms and subject to the conditions contained in an  Underwriting
Agreement  dated May    ,  1997, Morgan  Stanley & Co.  Incorporated and Salomon
Brothers Inc  (the Underwriters)  have  severally agreed  to purchase  from  the
Company,  and the Company has agreed to  sell to them, severally, the respective
principal amounts of  the Series  Z Bonds  set forth  opposite their  respective
names below.
 
<TABLE>
<CAPTION>
                                                                              PRINCIPAL AMOUNT
                                   NAME                                       OF SERIES Z BONDS
- ---------------------------------------------------------------------------   -----------------
 
<S>                                                                           <C>
Morgan Stanley & Co. Incorporated..........................................      $
Salomon Brothers Inc ......................................................
                                                                              -----------------
                                                                                 $60,000,000
                                                                              -----------------
                                                                              -----------------
</TABLE>
 
     The Underwriting Agreement provides that the obligation of the Underwriters
to  pay for and accept delivery of the Series Z Bonds is subject to the approval
of certain legal matters by their  counsel and to certain other conditions.  The
Underwriters'  obligations are such that they are  committed to take and pay for
all of the Series Z Bonds offered hereby if any are taken, provided, that  under
certain  circumstances involving a  default of an Underwriter,  less than all of
the Series  Z Bonds  may be  purchased.  Default by  one Underwriter  would  not
relieve  the non-defaulting Underwriter from its several obligations, and in the
event of such a default, the  non-defaulting Underwriter may be required by  the
Company  to purchase  the principal  amount of  the Series  Z Bonds  that it has
severally agreed to purchase and, in addition, to purchase the principal  amount
of  the Series  Z Bonds  that the  defaulting Underwriter  shall have  failed to
purchase up to a principal amount equal to one-ninth of the principal amount  of
the  Series Z Bonds that such non-defaulting Underwriter has otherwise agreed to
purchase.
 
                                      S-8
 
<PAGE>
<PAGE>
     The Underwriters initially  propose to  offer part  of the  Series Z  Bonds
directly  to the public at  the public offering price set  forth on the cover of
this Prospectus  Supplement  and  part  to certain  dealers  at  a  price  which
represents  a concession not  in excess of    %  of the principal  amount of the
Series Z Bonds.  The Underwriters  may allow, and  such dealers  may reallow,  a
concession not in excess of   % of the principal amount of the Series Z Bonds to
certain  other dealers. After  the initial public  offering, the public offering
price and concessions may be changed.
 
     The Series  Z Bonds  are a  new  issue of  securities with  no  established
trading  market, and  the Company does  not intend  to apply for  listing of the
Series Z Bonds on a  national securities exchange, but  has been advised by  the
Underwriters  that they presently intend to make a market in the Series Z Bonds,
as permitted  by  applicable  law  and regulations.  The  Underwriters  are  not
obligated,  however, to make a market in the Series Z Bonds, and any such market
making  may  be  discontinued  at  any  time  at  the  sole  discretion  of  the
Underwriters.  Accordingly, no assurance can be given as to the liquidity of the
trading market for the Series Z Bonds.
 
     In order to facilitate the offering of the Series Z Bonds, the Underwriters
may engage  in transactions  that stabilize,  maintain or  otherwise affect  the
price  of the  Series Z Bonds.  Specifically, the Underwriters  may overallot in
connection with the offering,  creating a short position  in the Series Z  Bonds
for  their own account. In addition, to cover overallotments or to stabilize the
price of the Series  Z Bonds, the  Underwriters may bid  for, and purchase,  the
Series  Z  Bonds in  the open  market. Finally,  the underwriting  syndicate may
reclaim  selling  concessions  allowed  to  an  underwriter  or  a  dealer   for
distributing  the Series Z  Bonds in the offering,  if the syndicate repurchases
previously distributed Series Z Bonds  in transactions to cover syndicate  short
positions,  in stabilization transactions or  otherwise. Any of these activities
may stabilize  or  maintain  the  market  price of  the  Series  Z  Bonds  above
independent  market levels. The Underwriters are not required to engage in these
activities, and may end any of these activities at any time.
 
     The Company  has  agreed  to indemnify  the  Underwriters  against  certain
liabilities, including liabilities under the Securities Act of 1933, as amended.
 
                           LEGAL OPINIONS AND EXPERTS
 
     Certain  statements of  law and legal  conclusions in  the Company's Annual
Report on Form 10-K for 1996, its Quarterly Report on Form 10-Q for the  quarter
ended  March 31, 1997  and its Current Report  on Form 8-K  dated April 11, 1997
with respect  to  short-term  borrowing  authority  and  the  earnings  coverage
requirement  of  the  Indenture,  its  franchises,  its  participation  in joint
projects, the  laws and  regulations  to which  it is  or  may be  subject,  and
litigation and legal proceedings, have been reviewed by Jeffrey C. Miller, Esq.,
Assistant  General Counsel of Northeast  Utilities Service Company, an affiliate
of the Company, and said statements are made upon his authority as an expert.
 
                                      S-9

<PAGE>
<PAGE>
PROSPECTUS
                     WESTERN MASSACHUSETTS ELECTRIC COMPANY
                              FIRST MORTGAGE BONDS
                     CLASS A PREFERRED STOCK, $25 PAR VALUE
 
                            ------------------------
     This  prospectus (the  Prospectus) is to  be used  by Western Massachusetts
Electric Company (the Company) in connection  with the issuance and sale at  one
time or from time to time of First Mortgage Bonds (the New Bonds) and/or Class A
Preferred  Stock, $25 par value (the New Preferred Stock). The New Bonds and the
New Preferred Stock are referred to herein as the New Securities. The  principal
amount and par value of all New Securities to be issued under this Prospectus in
the  aggregate shall not exceed $170,000,000.  For each series of New Securities
with respect to which this Prospectus  is being delivered, a supplement to  this
Prospectus (the Prospectus Supplement) will set forth (i) in the case of the New
Bonds, the principal amount of such series, the series designation, the purchase
price,  the public offering price, the interest rate, the maturity date, and any
redemption or sinking  fund terms  which differ  from the  descriptions of  such
terms  in  this Prospectus  and (ii)  in the  case of  New Preferred  Stock, the
specific number  of shares  of  New Preferred  Stock,  the purchase  price,  the
initial  public  offering price,  the dividend  rate  (or method  of calculation
thereof) and  any  redemption  or  sinking fund  terms  which  differ  from  the
descriptions of such terms in this Prospectus.
 
     The Prospectus Supplement will also set forth the names of the underwriters
or  other initial  purchasers of such  series of New  Securities, any applicable
underwriters' discounts,  allowances and  commissions,  if applicable,  the  net
proceeds  to the  Company from any  such sale  and other specific  terms of such
series. See 'Plan of Distribution' for possible indemnification arrangements for
underwriters and purchasers.
 
                            ------------------------
THESE SECURITIES HAVE  NOT BEEN APPROVED  OR DISAPPROVED BY  THE SECURITIES  AND
EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION NOR HAS THE COMMISSION OR
ANY  STATE SECURITIES  COMMISSION PASSED UPON  THE ACCURACY OR  ADEQUACY OF THIS
PROSPECTUS. ANY REPRESENTATION TO THE CONTRARY IS A CRIMINAL OFFENSE.
 
                THE DATE OF THIS PROSPECTUS IS DECEMBER 17, 1993

<PAGE>
<PAGE>
     NO  PERSON  HAS BEEN  AUTHORIZED TO  GIVE  ANY INFORMATION  OR TO  MAKE ANY
REPRESENTATION NOT CONTAINED, OR INCORPORATED  BY REFERENCE, IN THIS  PROSPECTUS
IN  CONNECTION WITH THE OFFER MADE BY THIS PROSPECTUS AND IF GIVEN OR MADE, SUCH
INFORMATION OR REPRESENTATION MUST NOT BE RELIED UPON AS HAVING BEEN  AUTHORIZED
BY  THE COMPANY OR ANY UNDERWRITER. THIS PROSPECTUS DOES NOT CONSTITUTE AN OFFER
TO SELL OR  A SOLICITATION  OF AN  OFFER TO BUY  ANY OF  THE SECURITIES  OFFERED
HEREBY  IN ANY JURISDICTION  TO ANY PERSON TO  WHOM IT IS  UNLAWFUL TO MAKE SUCH
OFFER OR SOLICITATION IN SUCH JURISDICTION.
 
     NEITHER THE DELIVERY OF THIS PROSPECTUS NOR ANY SALE MADE HEREUNDER  SHALL,
UNDER ANY CIRCUMSTANCES, CREATE ANY IMPLICATION THAT THERE HAS BEEN NO CHANGE IN
THE AFFAIRS OF THE COMPANY SINCE THE DATE HEREOF.
 
                            ------------------------
 
                             AVAILABLE INFORMATION
 
     The  Company is subject to the informational requirements of the Securities
Exchange Act of 1934 (the 1934 Act) and, in accordance therewith, files  reports
and  other information  with the Securities  and Exchange  Commission (the SEC).
Such reports and  other information can  be inspected and  copied at the  public
reference facilities maintained by the SEC at Room 1024, 450 Fifth Street, N.W.,
Washington,  D.C. 20549; 500 West Madison  Street, Suite 1400, Chicago, Illinois
60661-2511 and Seven  World Trade Center,  New York, New  York 10007. Copies  of
such material can also be obtained at prescribed rates from the Public Reference
Section  of  the  SEC  at  its  principal  office  at  450  Fifth  Street, N.W.,
Washington, D.C. 20549.
 
                            ------------------------
 
                INCORPORATION OF CERTAIN DOCUMENTS BY REFERENCE
 
     The Company's Annual Report  on Form 10-K for  the year ended December  31,
1992,  its Quarterly Reports on Form 10-Q for the quarters ended March 31, 1993,
June 30, 1993 and September 30, 1993, and its Current Reports on Form 8-K  dated
June  3, 1993, June 30, 1993 and September  10, 1993 (File No. 0-7624) have been
filed with the SEC pursuant to the 1934 Act and are hereby incorporated in  this
Prospectus by reference.
 
     All  documents filed by the Company pursuant  to Sections 13(a) and (c), 14
or 15(d) of  the 1934 Act  after the date  of this Prospectus  and prior to  the
termination  of this offering shall be deemed to be incorporated by reference in
this Prospectus  and to  be  a part  hereof  from the  date  of filing  of  such
documents.  Any statement contained  in a document incorporated  or deemed to be
incorporated by reference herein  shall be deemed to  be modified or  superseded
for  purposes of this Prospectus  and any amendment or  supplement hereto to the
extent that a  statement contained  herein or  in any  other subsequently  filed
document,  which also is  or is deemed  to be incorporated  by reference herein,
modifies or supersedes such statement.  Any statement so modified or  superseded
shall  not be deemed, except as so  modified or superseded, to constitute a part
of this Prospectus or any such amendment or supplement.
 
     Certain information contained in this Prospectus summarizes, is based upon,
or refers to,  information and  financial statements  contained in  one or  more
incorporated  documents;  accordingly,  such  information  contained  herein  is
qualified in its entirety by reference to  such documents and should be read  in
conjunction therewith.
 
     The  Company will provide without  charge to each person  to whom a copy of
this Prospectus has been delivered, on the request of any such person, a copy of
any or  all of  the  documents referred  to  above which  have  been or  may  be
incorporated  in  this  Prospectus by  reference,  other than  exhibits  to such
documents. Written requests should be directed to Western Massachusetts Electric
Company, P.O.  Box 270,  Hartford, Connecticut  06141-0270, Attention:  Investor
Relations.  Telephone  requests should  be  made to  (203)  665-5000, Attention:
Investor Relations.
 
                                       2
 
<PAGE>
<PAGE>
     IN CONNECTION  WITH ANY  FIRM  COMMITMENT OFFERING  MADE PURSUANT  TO  THIS
PROSPECTUS,  THE  UNDERWRITERS  MAY  OVER-ALLOT  OR  EFFECT  TRANSACTIONS  WHICH
STABILIZE OR MAINTAIN THE MARKET PRICE  OF THE SECURITIES OFFERED HEREBY OR  ANY
BONDS  OR  PREFERRED STOCK  OF THE  COMPANY AT  A LEVEL  ABOVE THAT  WHICH MIGHT
OTHERWISE PREVAIL IN  THE OPEN MARKET.  SUCH STABILIZING, IF  COMMENCED, MAY  BE
DISCONTINUED AT ANY TIME.
 
                                  THE COMPANY
 
     The  Company is a wholly-owned subsidiary  of Northeast Utilities (NU). The
four wholly-owned operating subsidiaries of  NU -- the Company, The  Connecticut
Light  and Power  Company, Public Service  Company of New  Hampshire and Holyoke
Water Power Company -- furnish electric  service in portions of Connecticut  and
New  Hampshire  and in  western Massachusetts.  The  Company is  a Massachusetts
corporation, organized in  1886, and is  qualified as a  foreign corporation  in
Connecticut.  The  Company is  an electric  utility  engaged principally  in the
production, purchase,  transmission, distribution  and  sale of  electricity  at
retail for residential, commercial, industrial and municipal purposes within the
Commonwealth of Massachusetts.
 
     The  principal executive  offices of the  Company are located  at 174 Brush
Hill Avenue, West Springfield, Massachusetts 01089 (telephone (413) 785-5871).
 
                                USE OF PROCEEDS
 
     The net proceeds from the issue and sale of the New Securities will be used
to refund,  either through  redemptions or  open market  purchases,  outstanding
first  mortgage bonds bearing relatively high interest rates and preferred stock
bearing relatively high dividend rates (collectively, the High Cost  Securities)
or  to refinance maturing  debt and/or to  fund sinking funds.  The Company will
calculate a breakeven rate for each series  of High Cost Securities, which is  a
discount  rate that equates the  present value of the  cash flow associated with
the new series of bonds (inclusive of  call premiums and new issue expenses)  to
the  present value  of the  cash flow associated  with the  issue being redeemed
(assuming comparable maturities or  average lives). The  Company will not  enter
into  a proposed refunding transaction unless the breakeven rate for a series of
bonds or preferred stock to be refunded exceeds the then-current market rate for
New Bonds or New Preferred Stock of similar amount and maturity or average life.
 
     The outstanding series of the  Company's securities that may, depending  on
prevailing  interest  rates, be  considered High  Cost Securities  and therefore
candidates for redemption or purchase with  the net proceeds from the issue  and
sale  of the  New Securities  include First  Mortgage Bonds  with interest rates
ranging from  5.75% to  10.125% and  maturities ranging  from March  1, 1997  to
December  1, 2018 and series of Preferred Stock with dividend rates ranging from
7.60% to 7.72% and  average lives ranging  from 18 years  to perpetual. Since  a
series of High Cost Securities may be refunded prior to the issuance of a series
of  New  Securities, short-term  debt  may be  temporarily  used to  finance the
refunding or redemption  and the proceeds  from the  issue and sale  of the  New
Securities would be used to repay this short-term debt.
 
     If  a series of the New Securities is  sold in advance of the maturity date
of the Company's short-term borrowings or the refunding of High Cost Securities,
the Company may temporarily  invest the net  proceeds from the  sale of the  New
Securities in the NU system money pool. The NU system money pool was established
by  certain  subsidiaries  of  NU,  including the  Company,  to  provide  a more
efficient use  of  the  cash resources  of  the  system and  to  reduce  outside
short-term  borrowings. Short-term borrowing needs of member companies are first
met with available funds of other member companies and funds may be withdrawn or
repaid to the  pool at any  time without prior  notice. Investing and  borrowing
subsidiaries  receive or  pay interest based  on the average  daily Federal Fund
rate, except that borrowings based on loans from NU bear interest at NU's cost.
 
                                       3
 
<PAGE>
<PAGE>
                          DESCRIPTION OF THE NEW BONDS
 
THE INDENTURE AND THE TRUSTEE
 
     Each series of the New Bonds is to be issued under and secured by the First
Mortgage Indenture and  Deed of Trust  dated as  of August 1,  1954 between  the
Company  and The First National Bank of Boston, Massachusetts, Successor Trustee
(the Trustee) (hereinafter referred to as the Original Indenture) and indentures
supplemental thereto, including  one or  more supplemental  indentures, each  of
which  would relate to a  series of the New Bonds  (each of which is hereinafter
referred to as a New Supplemental  Indenture). Copies of the Original  Indenture
and  of  the Sixteenth,  Twenty-fourth, Twenty-sixth,  Twenty-eighth, Thirtieth,
Thirty-third, Thirty-seventh, Forty-third, Fifty-eighth, Sixtieth,  Sixty-third,
Sixty-fifth,   Sixty-seventh,  Seventy-first   and  Seventy-second  Supplemental
Indentures and the form of  the New Supplemental Indenture (herein  collectively
referred to as the Indenture) have been filed as exhibits to, or incorporated by
reference in, the registration statement of which this Prospectus is a part (the
Registration  Statement).  The  summary  description of  the  provisions  of the
Indenture which follows  does not purport  to be  complete or to  cover all  the
provisions  thereof; however, all material terms  of the New Bonds are described
herein or, with respect to specific terms  of each series of New Bonds, will  be
described  more fully in the prospectus  supplement relating to such series. The
following summary  is qualified  in its  entirety by  express reference  to  the
provisions  of the Indenture and by  reference also to the definitions contained
therein, under which many of the  terms used have restrictive meanings.  Article
and  section references  herein are to  provisions of the  Original Indenture as
heretofore amended unless otherwise indicated.
 
     The Trustee acts  as a  depository bank of,  makes loans  to, and  performs
other  services for  the Company  and other  companies in  the NU  system in the
ordinary course of business.
 
GENERAL TERMS OF BONDS
 
     Each series of New Bonds will mature on the date provided for such  series,
and  will bear interest from the date of original issuance at the rate per annum
shown in  the  series  title.  Interest will  be  payable  semiannually  at  the
principal  corporate trust  office of the  Trustee in  Boston, Massachusetts, to
registered owners at  the close  of business  on the  record date  set for  each
series, or if a legal holiday or a day on which banks are authorized to close in
Boston,  Massachusetts,  on  the  next  preceding  banking  day.  The Prospectus
Supplement with respect to each series of New Bonds will set forth the  maturity
date, interest rate, interest payment dates and record dates for such series.
 
     The  New Bonds are to be issued only  in the form of fully registered bonds
without coupons  in denominations  of $1,000  or multiples  thereof and  may  be
presented  for exchange for a like aggregate principal amount of the same series
of New Bonds of other authorized denominations and for transfer at the principal
corporate trust office of the Trustee in Boston, Massachusetts, without  payment
in  either  case of  any charge  other than  for any  tax or  other governmental
charges required to be paid by the Company.
 
     The Indenture does not contain any  covenants or other provisions that  are
specifically  intended to afford holders of  the New Bonds special protection in
the event of a highly leveraged transaction.
 
SECURITY AND PRIORITY
 
     In the opinion  of counsel  for the  Company, the  Indenture constitutes  a
first  mortgage (except for encumbrances stated in the granting clauses thereof,
of Schedule A thereto and Permitted  Encumbrances) on all property now owned  by
the Company (other than certain property hereinafter referred to) and on all the
rents,  earnings and  income thereof,  but prior  to a  default the  Company may
retain possession of  the mortgaged property  and take the  rents, earnings  and
income  thereof.  Certain  property  is specifically  excepted  in  the granting
clauses of  the  Indenture,  consisting  principally  of  the  following:  cash,
receivables,  contracts, securities,  legal claims  and claims  for tax refunds;
office furniture and equipment; vehicles and their related equipment; materials,
merchandise and supplies  held for  sale in  the ordinary  conduct of  business;
materials  and supplies, fuel  and other personal  property which are consumable
(otherwise than by ordinary wear  and tear) in the  operation of the plants  and
systems of
 
                                       4
 
<PAGE>
<PAGE>
the  Company; materials  or supplies used  as components in  the construction of
electric utility or  steam plant and  held in  advance of use  thereof for  such
purpose;  the  last  day of  the  term  of any  lease;  all  property, leasehold
interests, permits, licenses,  franchises and  rights which may  not legally  be
subjected  to the lien of the Indenture  or which cannot be so subjected without
the consent of other parties whose consent  is not secured; and all small  tools
and  equipment and machinery  of portable size.  The property so  subject to the
lien of  the Indenture  includes  the Company's  interest  in all  the  physical
properties referred to under 'Item 2. Properties' in the Company's Annual Report
on Form 10-K for 1992 except the Cobble Mountain Plant and the generating plants
of  the  four  regional  nuclear generating  companies.  The  Indenture contains
after-acquired property  clauses  which,  in  the opinion  of  counsel  for  the
Company,  will be  effective as  to the  personal property  covered thereby when
acquired by the Company.  Insofar as such clauses  apply to after-acquired  real
property  they may, in the opinion of counsel, be effective only upon the filing
and recording of a supplemental indenture in respect of any such real  property.
(The granting clause, SS1.02 and Article VII.)
 
     Under  certain limited  circumstances, the lien  of the  Indenture could be
subordinated to a lien in favor of the Commonwealth of Massachusetts pursuant to
the Massachusetts Oil  and Hazardous Materials  Release Prevention and  Response
Act,  commonly known  as the  Massachusetts Superfund.  This law  creates a lien
effective against all real and personal property  of the site owner in favor  of
the  Commonwealth of Massachusetts for up to three times the Commonwealth's cost
incurred for  cleaning  up a  hazardous  waste site.  The  law also  contains  a
so-called  'super-lien' provision under which the  statutory lien is superior to
all other encumbrances, both existing and future, on the site of release of  the
hazardous waste.
 
     Also,  under certain  limited circumstances, the  lien of  the Indenture on
real property in Connecticut acquired by  the Company after June 3, 1985,  could
be  subordinated to a  lien in favor of  the State of  Connecticut pursuant to a
Connecticut law (Connecticut  General Statutes section  22a-452a) providing  for
such  a lien for reimbursement for  expenses incurred in containing, removing or
mitigating hazardous waste. The principal  real property interests owned by  the
Company  in  Connecticut  are the  Company's  joint ownership  interests  in the
Millstone nuclear electric  generating units,  substantially all  of which  were
acquired before June 3, 1985.
 
     Each  series of  the New Bonds  will rank  equally as to  security with the
bonds now outstanding, and  any additional bonds of  other series issued,  under
the  Indenture as from time  to time supplemented, and  will have priority as to
mortgage security over any other debt of the Company, except for debt secured by
Permitted Encumbrances, and except for debt  secured by liens of after  acquired
property   existing   at   the   time   of   acquisition   thereof   or  created
contemporaneously to secure or raise a part of the purchase price thereof  which
debt  under the Indenture may not  exceed 60% of the Cost  or Fair Value of such
property, whichever is less. (SSSS4.09 and 4.10.)
 
REDEMPTION PROVISIONS
 
     The redemption terms for each series of the New Bonds will be set forth  in
the  New Supplemental  Indenture and the  Prospectus Supplement  with respect to
such series.
 
ISSUANCE OF ADDITIONAL BONDS; EARNINGS COVERAGES
 
     The aggregate  principal amount  of bonds  which may  be issued  under  the
Indenture  is not limited by its terms. Additional bonds may be issued under the
Indenture (a) to the extent of 60% of  the lesser of the Cost or Fair Value  (at
date  of acquisition) of Available Net  Property Additions (SS3.08), (b) against
the deposit  of  cash equal  to  the principal  amount  of bonds  to  be  issued
(SS3.05),  and  (c)  to refund  other  bonds theretofore  outstanding  under the
Indenture (SS3.04). Such additional bonds, however, may be issued under SSSS3.05
and 3.08 and  in the case  of certain refundings  under SS3.04 only  if the  net
earnings  as defined have been at least twice the annual interest charges on all
bonds outstanding,  including the  additional bonds  applied for  but  excluding
bonds  to be redeemed from the proceeds  of such additional bonds, and all prior
lien obligations.  On the  basis of  this formula,  after giving  effect to  the
issuance of $65,000,000 of New Bonds at an assumed rate of 7.50%, $55,000,000 of
New Bonds at an assumed rate of 6.25% and $15,000,000 of New Bonds at an assumed
rate of 5.00%, in which the net
 
                                       5
 
<PAGE>
<PAGE>
proceeds  are used to refund outstanding First Mortgage Bonds having a breakeven
rate of 5.09% or above, the earnings coverage ratio for the twelve month  period
ending September 30, 1993 would be 2.75.
 
     As  of September  30, 1993, the  Available Net  Property Additions (SS3.08)
against which additional bonds might  be issued was approximately  $127,106,627,
sufficient  to permit the issue of approximately $76,263,976 aggregate principal
amount of  additional  bonds.  The  aggregate amount  of  First  Mortgage  Bonds
outstanding on September 30, 1993 was $309,235,000.
 
     Money  received by the  Trustee upon the issue  of additional bonds against
cash may be withdrawn by the Company, while not in default, in amounts equal  to
60%  of Available Net Property Additions based on  the Cost or Fair Value to the
Company at the date of acquisition, whichever  is less, and if not so  withdrawn
within  three years, shall be applied by  the Trustee to the redemption of bonds
of the series  in respect of  the issue  of which it  was deposited.  (SSSS1.02,
1.03, 3.06 and 3.07.)
 
IMPROVEMENT FUND
 
     The terms of the Improvement Fund, if any, for each series of the New Bonds
will  be  set  forth  in  the  New  Supplemental  Indenture  and  the Prospectus
Supplement with respect to such series.
 
MAINTENANCE OF PROPERTY
 
     The Indenture  contains  a general  maintenance  covenant. The  Company  is
required  by the Indenture in each fiscal year to charge to current earnings and
to credit to a depreciation reserve an amount not less than 2.1% of the  average
of  the  beginning and  ending balances  for such  year of  the total  plant and
equipment  devoted  to   utility  operation   of  the   Company,  exclusive   of
undepreciable  real estate  and rights  therein and  of unfinished construction.
Inspection by an engineer is required  annually, and the Company covenants  that
it  will make good  any maintenance deficiency and  record retirements as called
for by the engineer's certificate. (SSSS4.06 and 4.12 of the Original  Indenture
and SS7.02 of the First Supplemental Indenture.)
 
REPLACEMENT FUND
 
     The  Indenture contains a Replacement Fund Requirement effective January 1,
1967, pursuant to which the Company is required to make, in each calendar  year,
expenditures  for Property Additions in an amount  equal to 2.25% of the average
of the amounts of its Depreciable Property at the beginning and end of the  year
and,  if it fails so to do, to make up such deficiency on or before May 1 of the
ensuing calendar year by (a) depositing cash with the Trustee, or (b) depositing
outstanding bonds with the Trustee at  100% of the principal amount thereof,  or
(c)  allocating  Available Net  Property Additions  in an  amount equal  to 100%
thereof. Any cash or bonds so deposited  may be withdrawn and any Available  Net
Property  Additions so allocated may be reinstated,  to the extent that any such
deficiency is made up during an ensuing calendar year. (SSSS1.02(30) and 4.17 of
the Original  Indenture  as  supplemented  by Article  VII(d)  and  (i)  of  the
Twenty-fourth  Supplemental Indenture.) The Replacement  Fund credit at December
31, 1992 was $836,203,457.
 
DIVIDEND RESTRICTIONS
 
     The Indenture contains restrictions on the payment of dividends, which were
included in Supplemental Indentures at the time of the issuance of prior  series
of bonds. If a dividend restriction is included for any series of the New Bonds,
the  specific  terms will  be described  in the  Prospectus Supplement  for that
series. The  Sixty-fifth  Supplemental Indenture,  which  contains  restrictions
applicable so long as any Series T bonds are outstanding, currently contains the
most restrictive provision. Under this provision, the aggregate amount which may
be  declared, paid or otherwise applied by the Company after December 1, 1988 as
dividends or other distributions on its common stock (other than by way of stock
dividends or when an equal amount of cash is received concurrently as a  capital
contribution  or  on the  sale  of common  stock) or  on  the purchase  or other
acquisition of common  stock may  not exceed (i)  retained earnings  accumulated
after  November 30, 1988, plus (ii)  $40,000,000, plus (iii) such further amount
as may be authorized by the SEC under the Public Utility Holding Company Act  of
1935,   less  (iv)  preferred  dividends,  but  not  common  dividends,  accrued
subsequent to November
 
                                       6
 
<PAGE>
<PAGE>
30, 1988, and also less  (v) the amount, if any,  by which the Replacement  Fund
Requirement  exceeds  depreciation  charges  to  income  or  retained  earnings.
Pursuant to those  provisions, unrestricted retained  earnings at September  30,
1993  amounted  to  approximately  $94,337,596.  Similar  but  less  restrictive
dividend limitations are  applicable so  long as  other series  of bonds  remain
outstanding.
 
DEFAULT
 
     The Indenture provides that the following events will constitute 'events of
default'  thereunder:  failure to  pay  principal; failure  for  30 days  to pay
interest; failure for 60 days to make any payment in respect of the  Improvement
Fund  or  Replacement  Fund;  failure  to perform  any  of  the  other Indenture
covenants for  60  days after  notice  to the  Company;  and certain  events  in
bankruptcy,  insolvency  or receivership  (SS9.01).  The Indenture  requires the
Company to  deliver  to  the  Trustee an  annual  officers'  certificate  as  to
compliance by the Company with its covenants under the Indenture (SS4.15).
 
     The  Indenture provides that the holders  of a majority in principal amount
of the bonds outstanding may direct the time, method and place of conducting any
proceedings for the enforcement  of the Indenture;  provided, however, that  the
Trustee shall have the right to decline to follow any such direction if it shall
be advised by counsel that the action or proceeding so directed may not lawfully
be  taken or if the Trustee is not sufficiently indemnified for any expenditures
in any action or proceeding so directed (SS9.16).
 
MODIFICATION OR AMENDMENT OF THE INDENTURE
 
     The Indenture  may be  modified  or amended,  without  the consent  of  the
bondholders,  to add restrictions on the issue of additional bonds or additional
covenants by  the Company,  to  convey additional  property  to the  Trustee  or
correct  or  amplify  the  description of  the  mortgaged  property;  to correct
ambiguities, defects  or inconsistencies  in the  Indenture; or  to provide  for
separate  or co-Trustees  or for meetings  of bondholders. The  Indenture may be
modified or amended in any respect on 30 days' notice published and sent postage
prepaid to registered owners of bonds and with the written consent of holders of
at least 70% in principal  amount of all bonds  issued under the Indenture  then
outstanding;  provided  that,  among  other  things,  no  such  modification  or
amendment shall  permit any  change  in the  principal  amount or  premium,  any
extension of the maturity, or reduction of the rate, or extension of the time of
payment  for interest,  or in any  way affect  or impair the  obligations of the
Company in  respect  of principal  or  interest on  any  bond issued  under  the
Indenture then outstanding without the written consent of the holder thereof, or
affect  the rights of one or more  series of bonds differently from other series
except upon the written consent of at least 70% in principal amount of the bonds
of each series so affected then  outstanding, or permit the creation, except  as
expressly authorized in the Indenture, of any mortgage or other lien prior to or
on  a parity with the lien of the  Indenture or change any of the percentages of
holders of bonds required for  the taking of any action  to modify or amend  the
Indenture. (Article XVI.)
 
                     DESCRIPTION OF THE NEW PREFERRED STOCK
 
GENERAL
 
     The  Company's capital  stock consists of  shares of Common  Stock, $25 par
value per  share, as  well as  two classes  of preferred  stock, one  designated
'Preferred  Stock,'  having  a  par  value of  $100  per  share,  and  the other
designated 'Class A Preferred Stock,' having a  par value of $25 per share.  The
New  Preferred Stock described  in this Prospectus consists  entirely of Class A
Preferred Stock, $25 par  value. The Preferred Stock  and the Class A  Preferred
Stock are hereinafter sometimes collectively referred to as the Senior Stock.
 
     Shares of the Preferred Stock and shares of Class A Preferred Stock rank on
a  parity in respect of dividends or payment in case of liquidation, and, to the
extent not  fixed  and  determined  by the  Company's  by-laws  or  articles  of
organization,  have the same  rights, preferences and  powers. Voting rights are
the only differences in rights between the two classes and are summarized  below
under 'Voting Rights.'
 
                                       7
 
<PAGE>
<PAGE>
     The  Class A Preferred Stock may be issued from time to time in series when
authorized by the Company's Board of  Directors, up to the number of  authorized
but  unissued  shares of  Class A  Preferred  Stock set  forth in  the Company's
articles of organization, as amended from time to time. The series  designation,
dividend  rate (or method  of determining the  dividend rate), redemption prices
and other terms of each series are  determined by the Board of Directors to  the
extent not fixed by the Company's articles of organization and by-laws.
 
     The  general provisions  of the Senior  Stock, applicable to  all series of
Preferred Stock  and  Class  A  Preferred  Stock  and  the  specific  provisions
applicable  to each series, including the New  Preferred Stock, are set forth in
the by-laws and articles  of organization. A copy  of the Company's by-laws  and
the capital stock provisions of the Company's articles of organization are filed
as  exhibits to the Registration  Statement of which this  Prospectus is a part.
Article XVI of the by-laws contains  the Company's capital stock provisions  and
is  substantially identical to  the capital stock provisions  of the articles of
organization;  therefore,  for  convenience,   all  references  herein  are   to
provisions of Article XVI of the by-laws.
 
     The  provisions of  the Company's  Senior Stock  are summarized  below. The
summary does not purport to be complete or to cover all the provisions  thereof;
however,  all material terms of the New Preferred Stock are described herein or,
with respect to specific terms  of each series of  New Preferred Stock, will  be
described  more  fully in  the prospectus  supplement  relating to  such series.
Reference is made to aforementioned exhibits to the Registration Statement for a
complete statement of the Senior Stock provisions.
 
     The New Preferred Stock  will be transferable at  the offices of  Northeast
Utilities Service Company, Berlin, Connecticut, Transfer Agent and Registrar.
 
EARNINGS COVERAGE-SENIOR STOCK PROVISIONS
 
     The  Senior  Stock  provisions of  the  Company's by-laws  and  articles of
organization require for the issuance  of additional Senior Stock that  earnings
before  income taxes  be at least  one and  one-half times the  pro forma annual
interest charges on  all indebtedness  and annual dividend  requirements on  the
Senior  Stock to be outstanding after the  issuance of the additional stock (see
'Voting Rights'). On the basis of this formula, if the Company were to issue $35
million of the New Preferred  Stock at an assumed rate  of 6.5% and apply  those
proceeds,   together  with  $14  million  of  short-term  debt,  to  redeem  all
outstanding Preferred Stock with a breakeven rate of 5.9% or higher ($47 million
aggregate par value), the  earnings coverage ratio for  the twelve month  period
ending September 30, 1993 would be 2.12, based on the indebtedness and Preferred
Stock  outstanding  as  of  September  30,  1993,  after  giving  effect  to the
above-described adjustments.
 
DIVIDEND RIGHTS
 
     Holders of Senior Stock  of each class and  series are entitled to  receive
cumulative  dividends  when  declared by  the  Board  of Directors  at  the rate
provided for such class and series. Dividends  may not be declared or paid on  a
particular  class and series of  the Senior Stock unless  dividends have been or
are contemporaneously declared or paid on the Senior Stock of all other  classes
and  series for all dividend periods terminating on the same or an earlier date.
No dividend  may be  paid on  the Common  Stock or  other stock  of the  Company
subordinate  to  the  Senior Stock  in  respect  of dividends  or  assets (which
together with Common Stock is defined as 'junior stock') unless full  cumulative
dividends  to the last preceding  dividend date have been  paid or set apart for
payment of the Senior Stock (Sections 2A and 2B).
 
     The Company is, in effect, prohibited from making payments on junior stock,
by way of dividends or otherwise (other  than in shares of junior stock), in  an
amount  which, if the  percentage of junior  stock equity (as  defined) to total
capitalization (as defined) is  less than 20 percent,  would, together with  all
other  junior stock payments made within the  preceding 12 months, exceed 50% of
net income available for  dividends on junior stock,  or, if such percentage  is
between  20% and 25%, would  exceed 75% of such net  income (Sections 2C, 2D and
2E).
 
                                       8
 
<PAGE>
<PAGE>
     Dividends on each series of New  Preferred Stock will be payable  quarterly
at  the rate provided  for such series. If  a series of  the New Preferred Stock
were sold in December,  1993, dividends would  be payable on  the first days  of
March,  June, September and December in  each year (the Dividend Payment Dates),
beginning on  March 1,  1993. Dividends  will  be cumulative  from the  date  of
issuance.
 
SINKING FUND PROVISIONS
 
     If  a sinking  fund is  provided for a  particular series  of New Preferred
Stock, the Prospectus Supplement will describe the terms of the sinking fund for
that series.  See 'Redemption  and Purchase'  for limitations  on the  Company's
right  to redeem or  purchase Senior Stock if  the Company is  in arrears in the
payment of dividends on any outstanding shares of Senior Stock.
 
REDEMPTION AND PURCHASE
 
     All or any part of any series of Senior Stock outstanding may be  redeemed,
subject  to certain limitations, at any time at the redemption price established
for such series, except  that no redemption  of less than  all shares of  Senior
Stock  outstanding may  be made  if the  Company is  in arrears  with respect to
payment of dividends  on any  shares of  Senior Stock  outstanding (Sections  3A
through 3D).
 
     The  Company may purchase  any outstanding shares of  Senior Stock upon the
best terms reasonably obtainable, but not exceeding the then-current  redemption
price of such shares, except that no such purchase may be made if the Company is
in  arrears with respect to  payment of dividends on  any shares of Senior Stock
outstanding or if any event of default exists under the Senior Stock  provisions
(Section 3E).
 
     Unless  otherwise provided in the Prospectus Supplement, each series of the
New Preferred Stock will be redeemable for other than sinking fund purposes as a
whole or in  part at  any time, subject  to the  refunding provisions  described
below,  at the option of the Company upon at least 30 days' prior written notice
on the terms described in the Prospectus Supplement for that series.
 
     None of the New Preferred Stock of any series shall be redeemed prior to  a
date  five years after the first day of the month in which the applicable series
is issued,  if such  redemption is  for the  purpose of  or in  anticipation  of
refunding  such New Preferred Stock through  the use, directly or indirectly, of
borrowed funds or of the proceeds of the  issue by the Company of shares of  any
stock  ranking  prior to  or on  a parity  with  the New  Preferred Stock  as to
dividends or assets,  if such borrowed  funds or such  shares have an  effective
interest  cost or effective dividend cost (computed in accordance with generally
accepted financial principles), as the case  may be, of less than the  effective
dividend cost of the applicable New Preferred Stock.
 
     See   the  Prospectus  Supplement  for   more  information  concerning  the
redemption provisions with  respect to  any particular series  of New  Preferred
Stock.
 
LIQUIDATION RIGHTS
 
     The  Senior Stock  is entitled  to receive  upon voluntary  liquidation the
then-current redemption price  for the particular  series and, upon  involuntary
liquidation, $100 per share in the case of the Preferred Stock and $25 per share
in  the case  of the Class  A Preferred Stock,  plus in each  case all dividends
accrued and unpaid to the  date of such payment, before  any payment is made  on
junior stock (Section 4).
 
VOTING RIGHTS
 
     Except as otherwise provided by law, the Company's articles of organization
or the by-laws, holders of Senior Stock have no voting rights.
 
     Unless a separate class vote is required by the articles of organization or
by-laws or by law, both classes of Senior Stock vote together as a single class,
with  each share of the class  of Preferred Stock and each  share of the Class A
Preferred Stock  having  voting rights  proportionate  to their  respective  par
values.  Accordingly, each share  of Preferred Stock, $100  par value per share,
would have four times the
 
                                       9
 
<PAGE>
<PAGE>
voting rights of each share of Class A Preferred Stock, $25 par value per share.
Whenever the  two  classes  have  separate voting  rights,  each  share  of  the
applicable class has one vote.
 
     Whenever dividends on any share of Senior Stock are in arrears in an amount
equal  to or exceeding four quarterly dividend payments or whenever there exists
a default in the performance of any of the Senior Stock provisions or a  default
on  which action has been taken  by debentureholders, bondholders or the trustee
of any deed of  trust or mortgage  of the Company, or  whenever the Company  has
been  declared bankrupt or  a receiver of  its property has  been appointed, the
holders of Senior Stock have the right, voting together as a class, to elect the
smallest number of directors necessary to constitute a majority of the Board  of
Directors (Section 5).
 
     Without  the affirmative vote of a  majority in interest of the outstanding
shares of Senior Stock, the Company may not (Section 6A):
 
          1. Issue or  assume unsecured  notes, debentures  or other  securities
     representing  unsecured debt  (except to  redeem all  outstanding shares of
     Senior Stock or to refund unsecured  indebtedness) in excess of 20% of  the
     Company's  outstanding capital stock, surplus and secured indebtedness, or,
     with respect to unsecured  indebtedness having maturities  of less than  10
     years,  in excess of 10% of  outstanding capital stock, surplus and secured
     indebtedness. Payment due  upon the  maturity of unsecured  debt having  an
     original  single stated  maturity of  10 years or  more is  not regarded as
     unsecured debt with  a maturity of  less than 10  years until within  three
     years  of  the maturity  thereof, and  each  of the  payments due  upon any
     unsecured debt  having an  original stated  maturity for  the final  serial
     payment  of 10  years or  more is not  regarded as  an unsecured  debt of a
     maturity of less than 10 years until within three years of the maturity  of
     the final serial payment.
 
          By  the  affirmative  vote  of  the  holders  of  a  majority  of  the
     outstanding shares of Preferred  Stock at a  stockholders' meeting held  on
     January  25, 1989,  the Company  has been  authorized, notwithstanding such
     limitations, to  incur unsecured  indebtedness, having  maturities of  less
     than  10 years, in excess of 10%  of its capital stock, surplus and secured
     indebtedness, provided that (i)  such indebtedness is  issued on or  before
     March  31, 1994, (ii) such indebtedness has maturities not later than March
     31, 1995, and  (iii) the limitation  on all unsecured  indebtedness of  the
     Company  to 20% of  its capital stock, surplus  and secured indebtedness is
     complied with.
 
          On December 15, 1993,  a special meeting of  holders of the  Company's
     Common Stock and Senior Stock (Special Meeting) is scheduled to be held for
     the  purpose  of  authorizing  an amendment  (Amendment)  to  the Company's
     certificate of  incorporation and  by-laws relating  to the  limitation  on
     indebtedness  described above. If approved, and assuming the receipt of any
     necessary approval of the DPU to be obtained subsequent to the meeting, the
     Amendment will eliminate the limitation on the incurrence or assumption  of
     unsecured  indebtedness having maturities of less  than ten years in excess
     of 10% of capitalization, calculated as set forth above, but not in  excess
     of 20% of capitalization. In the event the Amendment is not approved by the
     requisite  vote of the holders of two-thirds of the shares of each class of
     the Company's stock (Common Stock voting as one class and the Senior  Stock
     voting  as a separate class), consideration will  be given to a vote of the
     holders of  the Company's  Senior  Stock to  extend the  Company's  current
     five-year  authorization  to  incur unsecured  indebtedness  above  the 10%
     restriction for an additional ten-year period ending on February 10,  2004.
     Adoption  of this proposal requires a majority vote of the shares of Senior
     Stock. NU has advised the Company that it intends to vote all of the shares
     of Common Stock of the Company, which constitute all such shares issued and
     outstanding, in favor of the Amendment.
 
          2. Issue, sell or otherwise dispose  of any shares of then  authorized
     but  unissued Senior Stock or  any other stock ranking  on a parity with or
     having priority over the Senior Stock as to dividends or assets if (a)  for
     a  period of 12  consecutive calendar months within  the 15 calendar months
     immediately preceding the  month of issue,  Income Before Interest  Charges
     (as  defined)  for  said  period  available  for  the  payment  of interest
     (including, in any case in which stock  is to be issued in connection  with
     the  acquisition of  property, the  Income Before  Interest Charges  of the
     property to be acquired) was not at least one and one-half times the sum of
     (i) the interest charges for one year on indebtedness then outstanding  and
     (ii)  annual  dividend requirements  on shares  of  Senior Stock  and stock
     ranking on  a  parity  with  or  having  priority  over  the  Senior  Stock
     outstanding  and proposed to be  issued, or (b) such  issue would bring the
     aggregate of the amount payable on
 
                                       10
 
<PAGE>
<PAGE>
     involuntary liquidation of the Company with respect to all shares of Senior
     Stock and all shares of stock ranking  on a parity with or having  priority
     over  the Senior Stock to an amount  in excess of 'junior stock equity' (as
     defined).
 
     Without the  affirmative vote  of at  least two-thirds  of the  outstanding
shares of Senior Stock, the Company may not:
 
          1. Authorize any shares of any class of stock having priority over the
     Senior  Stock as  to dividends or  assets or  issue any shares  of any such
     prior ranking  stock  more  than 12  months  after  the date  of  the  vote
     authorizing such prior ranking stock (Section 6B).
 
          2. Change the general terms, limitations and rights and preferences of
     the  Senior Stock, provided,  however, that if any  such change or proposed
     change would affect only one class of Senior Stock, then such change may be
     effected only  by the  affirmative  vote or  written  consent of  at  least
     two-thirds  in interest  of the outstanding  shares of Common  Stock and at
     least two-thirds in  interest of  the outstanding  shares of  the class  of
     Senior  Stock that is affected, voting or giving their consent in each case
     separately as  a class;  and provided  further  that in  no event  may  any
     reduction  of  the dividend  rate or  of amounts  payable on  redemption or
     liquidation with respect to any share  of Senior Stock be made without  the
     consent  of the holder thereof  and that no such  reduction with respect to
     shares of any  particular series of  Senior Stock may  be made without  the
     consent of all the holders of shares of such series (Section 6C).
 
     The  by-laws  require  the  consent  of  a  majority  in  interest  of  the
outstanding shares of  the Senior  Stock for a  merger or  consolidation of  the
Company with or into any other corporation or for a sale of all or substantially
all  of the Company's  assets unless such  merger, consolidation or  sale or the
issuance or assumption of securities in the effectuation thereof shall have been
permitted under the Public Utility Holding Company Act of 1935 (Section 7).
 
MISCELLANEOUS
 
     Except as otherwise  expressly provided  by law,  the Senior  Stock has  no
preemptive  or  conversion rights  and  (except as  provided  with respect  to a
particular series of either class  of the Senior Stock)  is not entitled to  the
benefit  of any sinking  fund. See 'Sinking Fund  Provisions.' Upon due issuance
and the receipt by the Company of the purchase price therefor, all shares of the
New Preferred Stock will be fully paid and nonassessable.
 
                           LEGAL OPINIONS AND EXPERTS
 
     Legal matters in connection  with the issue of  the New Securities will  be
passed  upon for the Company  by Robert P. Wax,  Esq., Vice President, Secretary
and General  Counsel of  the  Company, or  Jeffrey  C. Miller,  Esq.,  Assistant
General Counsel of NUSCO. The legality of the New Securities will be passed upon
for the underwriters or other purchasers by Winthrop, Stimson, Putnam & Roberts,
One Battery Park Plaza, New York, New York.
 
     Statements  of law  and legal  conclusions herein  and in  the Registration
Statement pertaining to  the description of  the New Preferred  Stock have  been
reviewed  by  Mr. Miller.  Certain statements  of law  and legal  conclusions as
described in the Company's  Annual Report on Form  10-K for 1992, its  Quarterly
Reports  on Form 10-Q for  the quarters ended March 31,  1993, June 30, 1993 and
September 30, 1993, and its Current Reports on Form 8-K dated June 3, 1993, June
30, 1993 and September 10, 1993  with respect to short-term borrowing  authority
and  the  earnings coverage  requirement of  the  Indenture and  preferred stock
provisions of the Company, its franchises, its participation in joint  projects,
the  laws and regulations to  which it is or may  be subject, and litigation and
legal proceedings, have been reviewed by Mr. Miller and said statements are made
upon his authority as an expert.
 
     The Company's audited financial  statements and schedules related  thereto,
incorporated  by  reference  in this  Prospectus,  have been  audited  by Arthur
Andersen & Co., independent  public accountants, as  indicated in their  reports
with  respect thereto, which have also been incorporated by reference herein, in
reliance upon the authority of said  firm as experts in accounting and  auditing
in giving said reports.
 
                                       11
 
<PAGE>
<PAGE>
                              PLAN OF DISTRIBUTION
 
     The  Company will sell the New Securities in one or more sales, pursuant to
a negotiated underwriting or pursuant to the solicitation (through the giving of
notice to two  or more  potential purchasers) and  acceptance of  a proposal  or
proposals  for  the  purchase of  all  or  any portion  of  the  New Securities.
Purchasers of the New Securities  may include underwriters or purchasers  acting
for  themselves. If underwriters are involved in the sale, the applicable series
of New Securities will be acquired by the underwriters for their own account and
may be  resold  from  time  to  time in  one  or  more  transactions,  including
negotiated  transactions, at a fixed public  offering price or at various prices
determined at the time of sale.
 
     The Prospectus Supplement relating to a  series of New Securities will  set
forth  the purchase price of New Securities of such series with respect to which
an agreement of sale has been entered  into by the Company, the proceeds to  the
Company  from such  sale, and  the terms  of any  reoffering of  New Securities,
including the  names  of  any  underwriters,  the  underwriters'  discounts  and
allowances,  any initial public offering price  and any discounts or concessions
allowed or reallowed or paid to  dealers. Any initial public offering price  and
any  discounts  or concessions  allowed  or reallowed  or  paid to  dealers with
respect to New Securities may be changed from time to time. Unless otherwise set
forth in the Prospectus Supplement, the obligations of the underwriters or other
purchasers will be subject to certain conditions precedent and the  underwriters
or  other purchasers will be obligated to  purchase all of the New Securities of
the applicable series if any of them are purchased, provided that under  certain
circumstances involving a default of underwriters or other purchasers, less than
all of the New Securities of a series may be purchased.
 
     The  Company  may  indemnify  any  underwriter  with  respect  to  the  New
Securities  against  certain  liabilities,   including  liabilities  under   the
Securities Act of 1933.
 
                       RATIO OF EARNINGS TO FIXED CHARGES
 
     Below are set forth the ratios of earnings to fixed charges for each of the
years  in the period 1988 through 1992 and for the twelve months ended September
30, 1993. The ratios have been restated to reflect only the revenues and  income
from  the Company's continuing  electric business. The  Company divested its gas
business on June 30, 1989.
 
<TABLE>
<CAPTION>
TWELVE-MONTH
PERIOD ENDED                                                                    RATIO
- -----------------------------------------------------------------------------   -----
 
<S>                                                                             <C>
December 31, 1988............................................................   2.32
December 31, 1989............................................................   2.12
December 31, 1990............................................................   2.00
December 31, 1991............................................................   2.26
December 31, 1992............................................................   2.43
September 30, 1993 (unaudited)...............................................   2.69
</TABLE>
 
           RATIO OF EARNINGS TO FIXED CHARGES AND PREFERRED DIVIDENDS
 
     Below are set forth the ratios  of earnings to fixed charges and  preferred
dividends  for each  of the years  in the period  1988 through 1992  and for the
twelve months ended September 30, 1993. The ratios have been restated to reflect
only the revenues and  income from the  Company's continuing electric  business.
The Company divested its gas business on June 30, 1989.
 
<TABLE>
<CAPTION>
TWELVE-MONTH
PERIOD ENDED                                                                    RATIO
- -----------------------------------------------------------------------------   -----
 
<S>                                                                             <C>
December 31, 1988............................................................   1.76
December 31, 1989............................................................   1.66
December 31, 1990............................................................   1.57
December 31, 1991............................................................   1.74
December 31, 1992............................................................   1.88
September 30, 1993 (unaudited)...............................................   2.13
</TABLE>
 
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