EDISON INTERNATIONAL



                                       TO

                              THE BANK OF NEW YORK,
                                   AS TRUSTEE



                          SUPPLEMENTAL INDENTURE NO. 2



                            Dated as of July 18, 2000



                                  $250,000,000

                          Floating Rate Notes Due 2001








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                              EDISON INTERNATIONAL

                                  $250,000,000

                          Floating Rate Notes Due 2001

                          SUPPLEMENTAL INDENTURE NO. 2

   SUPPLEMENTAL INDENTURE No. 2, dated as of July 18, 2000, between Edison
International, a California corporation (the "Corporation"), and The Bank of New
York, a New York banking corporation, as successor Trustee (the "Trustee") to
Harris Trust and Savings Bank, an Illinois banking corporation.

                                    RECITALS

   The Corporation and the Trustee are parties to a Senior Indenture, dated as
of September 28, 1999, as amended and supplemented (the "Senior Indenture"),
providing for the issuance from time to time of series of the Corporation's
Securities.

   Section 301 of the Senior Indenture provides for various matters with respect
to any series of Securities issued under the Senior Indenture to be established
in an indenture supplemental to the Senior Indenture.

   Section 901 of the Senior Indenture provides for the Corporation and the
Trustee to enter into an indenture supplemental to the Senior Indenture to
establish the form or terms of Securities of any series as provided by Sections
201 or 301 of the Senior Indenture.

   For and in consideration of the premises and the issuance of the series of
Securities provided for herein, it is mutually covenanted and agreed, for the
equal and proportionate benefit of the Holders of the Securities of such series,
as follows:

                                   ARTICLE 1.
                       RELATION TO INDENTURE; DEFINITIONS

   Section 1.1 This Supplemental Indenture No. 2 constitutes an integral part of
the Senior Indenture.

   Section 1.2 For all purposes of this Supplemental Indenture No. 2, except as
otherwise expressly provided or unless the context otherwise requires:

   (A) capitalized terms used herein without definition will have the meanings
specified in the Senior Indenture;

   (B) the terms defined in this Article have the meanings assigned to them in
this Article and include the plural as well as the singular;


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   (C) all other terms used herein which are defined in the Trust Indenture Act,
either directly or by reference therein, have the meanings assigned to them
therein;

   (D) all accounting terms not otherwise defined herein have the meanings
assigned to them in accordance with generally accepted accounting principles,
and, except as otherwise herein expressly provided, the term "generally accepted
accounting principles" with respect to any computation required or permitted
hereunder shall mean such accounting principles as are generally accepted in the
United States of America;

   (E) unless the context otherwise requires, any reference to an "Article" or a
"Section" refers to an Article or a Section, as the case may be, of this
Supplemental Indenture No. 2; and

   (F) the words "herein," "hereof," "hereunder" and other words of similar
import refer to this Supplemental Indenture No. 2 as a whole and not to any
particular Article, Section or other subdivision.

   (G) Specific Definitions:

          (1)  "Calculation Agent" means the Trustee or its successor appointed
               by the Corporation, acting as calculation agent.

          (2)  "Interest Determination Date" means the second London Business
               Day immediately preceding the first day of the relevant Interest
               Period.

          (3)  "Interest Payment Date" shall have the meaning specified in
               Section 2.4 hereof.

          (4)  "Interest Period" means the period commencing on an Interest
               Payment Date for the Notes (or commencing on the issue date for
               the Notes, if no interest has been paid or duly made available
               for payment since that date) and ending on the day before the
               next succeeding Interest Payment Date for the Notes.

          (5)  "LIBOR" for any Interest Determination Date will be the offered
               rate for deposits in U.S. dollars having an index maturity of one
               month for a period commencing on the second London Business Day
               immediately following the Interest Determination Date in amounts
               of not less than $1,000,000, as such rate appears on Telerate
               Page 3750 at approximately 11:00 a.m. London time on the Interest
               Determination Date (the "Reported Rate").


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          (6)  "London Business Day" means a day on which dealings in deposits
               in U.S. dollars are transacted, or with respect to any future
               date are expected to be transacted, in the London interbank
               market.

          (7)  "Notes" shall have the meaning specified in Section 2.1 hereof.

          (8)  "Regular Record Date" means, for the interest payable on any
               Interest Payment Date, the date which is fifteen days immediately
               prior to such Interest Payment Date (whether or not a Business
               Day).

          (9)  "Telerate Page 3750" means the display designated on page 3750 on
               Dow Jones Markets Limited (or such other page as may replace the
               3750 page on that service or such other service as may be
               nominated by the British Bankers' Association for the purpose of
               displaying London interbank offered rates for U.S. dollar
               deposits or such other successor reporter of such rates as may be
               selected by the Calculation Agent and acceptable to the
               Corporation).

                                   ARTICLE 2.
                            THE SERIES OF SECURITIES

   Section 2.1 Title of the Securities. There shall be a series of Securities
designated the "Floating Rate Notes Due 2001" (the "Notes").

   Section 2.2 Limitation on Aggregate Principal Amount; Date of Notes. The
aggregate principal amount of the Notes shall be limited to $250,000,000. Each
Note shall be dated the date of its authentication.

   Section 2.3 Principal Payment Date. Subject to Section 2.4 hereof, the
principal amount of the Notes Outstanding (together with any accrued and unpaid
interest) shall be payable in a single installment on July 18, 2001.

   Section 2.4 Interest and Interest Rates.

   (A) Interest on the Notes shall be payable on the 18th day of each month
(each such date, an "Interest Payment Date"), commencing on August 18, 2000,
through the maturity date of July 18, 2001. Interest will accrue from the issue
date of July 18, 2000 and will be paid to the Person in whose name such Note is
registered in the Security Register at the close of business on the Regular
Record Date for such interest installment. The interest so payable on any Note
which is not punctually paid or duly provided for on any Interest Payment Date
shall forthwith cease to be payable to the Holder on such Regular Record Date
and may either be paid to the Person in whose name such Note is registered in
the Security Register at the close of business on a date ("Special Record Date")
for the payment of such Defaulted Interest to be fixed by the Trustee, notice
whereof shall be given to Holders of Notes not less than 10 days prior to such


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Special Record Date, or be paid at any time in any other lawful manner not
inconsistent with the requirements of any securities exchange on which the Notes
may be listed, and upon such notice as may be required by such exchange, all as
more fully provided in the Senior Indenture. If any scheduled Interest Payment
Date falls on a day that is not a Business Day, it will be postponed to the
following Business Day. If the maturity date of the Notes falls on a day which
is not a Business Day, the required payment of principal and/or interest shall
be made on the following day which is a Business Day as if it were made on the
date the payment was due. Interest will not accrue as a result of this delayed
payment.

   (B) The Notes will bear interest for each monthly Interest Period at a per
annum rate determined by the Calculation Agent, subject to the maximum interest
rate permitted by California or other applicable state law, as such law may be
modified by United States law of general application. The interest rate
applicable during each monthly Interest Period will be equal to LIBOR on the
Interest Determination Date for such Interest Period plus 0.03%; provided,
however, that in certain circumstances described below in Section 2.4(C) of this
Supplemental Indenture No. 2, the interest rate will be determined without
reference to LIBOR. Promptly upon such determination, the Calculation Agent will
notify the Trustee, if the Trustee is not then serving as the Calculation Agent,
of the interest rate for the new Interest Period. The interest rate determined
by the Calculation Agent, absent manifest error, shall be binding and conclusive
upon the beneficial owners and Holders of the Notes, the Corporation and the
Trustee.

   (C) If the following circumstances exist on any Interest Determination Date,
the Calculation Agent shall determine the interest rate for the Notes as
follows:

     (1)  In the event no Reported Rate appears on Telerate Page 3750 as of
          approximately 11:00 a.m. London time on an Interest Determination
          Date, the Calculation Agent shall request the principal London offices
          of each of four major banks in the London interbank market selected by
          the Calculation Agent (after consultation with the Corporation) to
          provide a quotation of the rate (the "Rate Quotation") at which one
          month deposits in amounts of not less than $1,000,000 are offered by
          it to prime banks in the London interbank market, as of approximately
          11:00 a.m. on such Interest Determination Date, that are
          representative of single transactions at such time (the
          "Representative Amounts"). If at least two Rate Quotations are
          provided, the interest rate will be the arithmetic mean of the Rate
          Quotations obtained by the Calculation Agent, plus 0.03%.

     (2)  In the event no Reported Rate appears on Telerate Page 3750 as of
          approximately 11:00 a.m. London time on an Interest Determination Date
          and there are fewer than two Rate Quotations, the interest rate will
          be the arithmetic mean of the rates quoted at approximately 11:00 a.m.
          New York City time on such Interest Determination Date, by three major


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          banks in New York City selected by the Calculation Agent (after
          consultation with the Corporation), for loans in Representative
          Amounts in U.S. dollars to leading European banks, having an index
          maturity of one month for a period commencing on the second London
          Business Day immediately following such Interest Determination Date,
          plus 0.03%; provided, however, that if fewer than three banks selected
          by the Calculation Agent are quoting such rates, the interest rate for
          the applicable Interest Period will be the same as the interest rate
          in effect for the immediately preceding Interest Period.

   (D) Upon the request of a Holder of the Notes, the Calculation Agent will
provide to such Holder the interest rate in effect on the date of such request
and, if determined, the interest rate for the next Interest Period.

   (E) Interest on the Notes will be calculated on the basis of the actual
number of days for which interest is payable in the relevant Interest Period,
divided by 360. All dollar amounts resulting from such calculation will be
rounded, if necessary, to the nearest cent with one-half cent rounded upward.

   Section 2.5 Place of Payment. The Place of Payment where the Notes may be
presented or surrendered for payment, where the Notes may be surrendered for
registration of transfer or exchange and where notices and demands to or upon
the Corporation in respect of the Notes and the Senior Indenture may be served
shall be the Corporate Trust Office of the Trustee.

   Section 2.6 Exchange. At any time, the Corporation may cause the Notes to be
distributed to Holders of the Notes in definitive certificated form upon prior
notice to the Trustee.

   Section 2.7 Denomination. The Notes shall be in registered form without
coupons and shall be issuable in denominations of $1,000 and
integral multiples thereof.

   Section 2.8 Currency. Principal and interest and other amounts payable on the
Notes shall be paid in such coin or currency of the United States of America as
at the time of payment is legal tender for payment of public and private debt.

   Section 2.9 Form of Notes. The Notes shall be issuable in whole in the form
of one or more Global Securities, and the Depositary for such Global Securities
shall be The Depository Trust Company, New York, New York. The Notes shall be
substantially in the form attached as Exhibit A hereto.

   Section 2.10 Securities Registrar and Paying Agent; Unclaimed Amounts. The
Trustee shall initially serve as Security Registrar and Paying Agent. Any amount
paid to the Trustee or any Paying Agent, or held in trust by the Corporation,
for payments on any Note, that remains unclaimed at the end of two years after
such amount is due will be repaid to the Corporation.

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   Section 2.11 No Redemption. The Notes may not be redeemed at any time prior
to the principal payment date specified in Section 2.3 of this
Supplemental Indenture No. 2.

   Section 2.12 No Defeasance or Covenant Defeasance. The Notes shall not be
subject to Defeasance or Covenant Defeasance at the option of the Corporation
pursuant to Article XIII of the Senior Indenture.

   Section 2.13 No Sinking Fund Obligations. The Corporation has no obligation
to redeem or purchase any Notes pursuant to any sinking fund or analogous
requirement or upon the happening of a specified event or at the option of a
Holder thereof.

                                   ARTICLE 3.
                            MISCELLANEOUS PROVISIONS

   Section 3.1 The Senior Indenture, as supplemented and amended by this
Supplemental Indenture No. 2, is in all respects hereby adopted, ratified and
confirmed.

   Section 3.2 This Supplemental Indenture No. 2 may be executed in any number
of counterparts, each of which shall be an original, but such counterparts shall
together constitute but one and the same instrument.

   Section 3.3 Nothing in this Supplemental Indenture No. 2, express or implied,
shall give to any Person, other than the parties hereto and their successors and
assigns, and the Holders of the Notes, any benefit or legal or equitable right,
remedy or claim under this Supplemental Indenture No. 2 or the Senior Indenture.

   Section 3.4 THIS SUPPLEMENTAL INDENTURE NO. 2 AND EACH NOTE SHALL BE GOVERNED
BY AND CONSTRUED IN ACCORDANCE WITH THE LAWS OF THE STATE OF CALIFORNIA, WITHOUT
REGARD TO CONFLICTS OF LAWS PRINCIPLES THEREOF.


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   IN WITNESS WHEREOF, the parties hereto have caused this Supplemental
Indenture No. 2 to be duly executed, as of the day and year first written above.

                                            EDISON INTERNATIONAL


                                       By:      Mary C. Simpson
                                            -----------------------------
                                            Name:  Mary C. Simpson
                                            Title: Assistant Treasurer



Attest:


Kenneth S. Stewart
--------------------
Kenneth S. Stewart
                                            THE BANK OF NEW YORK,
                                                 as Trustee


                                            By: Terence Rawlins
                                                -----------------------
                                                Terence Rawlins
                                                Assistant Vice President
                                                Authorized Signatory


Attest:  Keith Stewart
         -------------------
         Keith Stewart