DUQUESNE LIGHT COMPANY

                        OFFICER'S CERTIFICATE SUPPLEMENTAL TO
                      OFFICER'S CERTIFICATE DATED JUNE 15, 1993
                   (Under Section 301 of the Indenture of Mortgage
                     and Deed of Trust of Duquesne Light Company


                    I, the undersigned                   ,
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                          of DUQUESNE LIGHT COMPANY (the "Company"), in
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          accordance with Section 301 of the Indenture of Mortgage and Deed
          of Trust, dated as of April 1, 1992 (the "Original Indenture"),
          as heretofore supplemented (as so supplemented, the "Mortgage,"
          capitalized terms used herein and not defined herein having the
          meanings specified in the Mortgage), of the Company to The Chase
          Manhattan Bank (successor to Mellon Bank, N.A.), as Trustee, do
          hereby amend and supplement the Officer's Certificate dated June
          15, 1993 (the "Original Officer's Certificate") which established
          certain terms and characteristics for the series of Securities
          established in Supplemental Indenture No. 5, dated as of June 1,
          1993, and designated First Collateral Trust Bonds, Series E, as
          follows with respect to the tranche of such Bonds being issued on
          the date hereof referred to as the Company's    % Quarterly
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          Interest Bonds Due 2038 (the "Quarterly Interest Bonds"):

                    1.   The following provision shall be added to the end
          of clause (d):

               ; and provided, further, that the principal of the Quarterly
               Interest Bonds shall be payable as provided in the form
               attached hereto;

                    2.   The following provision shall be added to the end
          of clause (e):

               ; and provided, still further, that the Quarterly Interest
               Bonds shall bear interest at the rate set forth in the form
               thereof attached hereto, the Interest Payment Dates for the
               Quarterly Interest Bonds shall be February 1, May 1, August
               1 and November 1, commencing August 1, 1998, and the Regular
               Record Dates for the Quarterly Interest Bonds with respect
               to the Interest Payment Dates shall be January 15, April 15,
               July 15 and October 15;

                    3.   The following provision shall be added to the end
          of clause (g):

               ; provided, that the Quarterly Interest Bonds shall be
               redeemable at the option of the Company as provided in the
               form thereof attached hereto;

                    4.   The following provision shall be added to the end
          of clause (i):

               ; provided, however, that the Quarterly Interest Bonds shall
               be issued in denominations of $25 and integral multiples
               thereof; and

                    5.   The following provisions shall be added to clause
          (s):

               and, provided further, that the Quarterly Interest Bonds
               shall be substantially in the form attached hereto and
               hereby authorized and approved and shall have such further
               terms as are set forth in such form; and

                         (iii) if the Company shall make any deposit of
               money and/or Eligible Obligations with respect to any Bonds,
               or any portion of the principal amount thereof, as
               contemplated by Section 901 of the Indenture, the Company
               shall not deliver an Officer's Certificate described in
               clause (z) in the first paragraph of said Section 901 unless
               the Company shall also deliver to the Trustee, together with
               such Officer's Certificate, either:

                         (A)  an instrument wherein the Company,
                    notwithstanding the satisfaction and discharge of
                    its indebtedness in respect of such Bonds, shall
                    assume the obligation (which shall be absolute and
                    unconditional) to irrevocably deposit with the
                    Trustee or Paying Agent such additional sums of
                    money, if any, or additional Eligible Obligations
                    (meeting the requirements of Section 901), if any,
                    or any combination thereof, at such time or times,
                    as shall be necessary, together with the money
                    and/or Eligible Obligations theretofore so
                    deposited, to pay when due the principal of and
                    premium, if any, and interest due and to become
                    due on such Securities or portions thereof, all in
                    accordance with and subject to the provisions of
                    said Section 901; provided, however, that such
                    instrument may state that the obligation of the
                    Company to make additional deposits as aforesaid
                    shall be subject to the delivery to the Company by
                    the Trustee of a notice asserting the deficiency
                    accompanied by an opinion of an independent public
                    accountant of nationally recognized standing,
                    selected by the Trustee, showing the calculation
                    thereof (which opinion shall be obtained at the
                    expense of the Company); or

                         (B)  an Opinion of Counsel to the effect that
                    the Holders of such Bonds, or portions of the
                    principal amount thereof, will not recognize
                    income, gain or loss for United States federal
                    income tax purposes as a result of the
                    satisfaction and discharge of the Company's
                    indebtedness in respect thereof and will be
                    subject to United States federal income tax on the
                    same amounts, at the same times and in the same
                    manner as if such satisfaction and discharge had
                    not been effected; and

                         (iv) the Holders of the Quarterly Interest Bonds
               shall be deemed to have consented to the execution and
               delivery of a supplemental indenture containing one or more,
               or all, the amendments to the Original Indenture set forth
               below (or amendments of substantially the same tenor or
               effect):

                         (A)  the amendment of the definition of Stated
                    Interest Rate in Section 101 of the Original Indenture
                    to read as follows:

                              "STATED INTEREST RATE" means a rate (whether
                    fixed or variable) at which an obligation by its terms
                    is stated to bear simple interest.  Any calculation or
                    other determination to be made under this Indenture by
                    reference to the Stated Interest Rate on an obligation
                    shall be made (a) if the Company's obligations in
                    respect of any other indebtedness shall be evidenced or
                    secured in whole or in part by such obligation, by
                    reference to the lower of the Stated Interest Rate on
                    such obligation and the Stated Interest Rate on such
                    other indebtedness and (b) without regard to the
                    effective interest cost to the Company of such
                    obligation or of any such other indebtedness.

                         (B)  the amendment of the definition of "Cost" in
                    Section 104 of the Original Indenture to read as
                    follows:

                              Except as otherwise provided in Section 803,
                    the term "COST" with respect to Property Additions
                    shall mean the sum of (i) any cash delivered in payment
                    therefor or for the acquisition thereof, (ii) an amount
                    equivalent to the fair market value in cash (as of the
                    date of delivery) of any securities or other property
                    delivered in payment therefor or for the acquisition
                    thereof, (iii) the principal amount of any obligations
                    secured by prior Lien (other than a Class A Mortgage)
                    upon such Property Additions outstanding at the time of
                    the acquisition thereof, (iv) the principal amount of
                    any other obligations incurred or assumed in connection
                    with the payment for such Property Additions or for the
                    acquisition thereof and (v) any other amounts which, in
                    accordance with generally accepted accounting
                    principles, are properly charged or chargeable to the
                    plant or other property accounts of the Company with
                    respect to such Property Additions as part of the cost
                    of construction or acquisition thereof, including, but
                    not limited to, any allowance for funds used during
                    construction or any similar or analogous amount;
                    provided, however, that, notwithstanding any other
                    provision of this Indenture,

                         (x)  with respect to Property Additions owned by a
                    successor corporation immediately prior to the time it
                    shall have become such by consolidation or merger or
                    acquired by a successor corporation in or as a result
                    of a consolidation or merger (excluding, in any case,
                    Property Additions owned by the Company immediately
                    prior to such time), Cost shall mean the amount or
                    amounts at which such Property Additions are recorded
                    in the plant or other property accounts of such
                    successor corporation, or the predecessor corporation
                    from which such Property Additions are acquired, as the
                    case may be, immediately prior to such consolidation or
                    merger;

                         (y)  with respect to Property Additions which
                    shall have been acquired (otherwise than by
                    construction) by the Company without any consideration
                    consisting of cash, securities or other property or the
                    incurring or assumption of indebtedness, no
                    determination of Cost shall be required, and, wherever
                    in this Indenture provision is made for Cost or fair
                    value, Cost with respect to such Property Additions
                    shall mean an amount equal to the fair value to the
                    Company thereof or, if greater, the aggregate amount
                    reflected in the Company's books of account with
                    respect thereto upon the acquisition thereof; and

                         (z)  in no event shall the Cost of Property
                    Additions be required to reflect any depreciation or
                    amortization in respect of such Property Additions, or
                    any adjustment to the amount or amounts at which such
                    Property Additions are recorded in plant or other
                    property accounts due to the non-recoverability of
                    investment or otherwise.

                         (C)  the amendment of the proviso to clause (d) in
                    Section 803 of the Original Indenture to:

                              (1)  delete therefrom clause (x) or to
                    provide that clause (x) may be disregarded upon
                    specified conditions; and/or

                              (2)  (a)  to delete therefrom clause (z) or
                    to provide that clause (z) may be disregarded upon
                    specified conditions; or

                                   (b)  to delete from clause (z) therein
                    the phrase "fifteen per centum (15%) of"; or

                                   (c)  to change the phrase "fifteen per
                    centum (15%)" in clause (z) therein to any higher
                    percentage not exceeding one hundred per centum (100%).

                         (D)  the addition to the Original Indenture of a
                    definition of the term "purchase money mortgage"
                    substantially to the following effect:

                              "PURCHASE MONEY MORTGAGE" means, with respect
                    to any property being acquired or disposed of by the
                    Company or being released from the Lien of this
                    Indenture, a Lien on such property which

                              (a) is taken or retained by the transferor of
                    such property to secure all or part of the purchase
                    price thereof;

                              (b) is granted to one or more Persons other
                    than the transferor which, by making advances or
                    incurring an obligation, give value to enable the
                    grantor of such Lien to acquire rights in or the use of
                    such property;

                              (c)  is granted to any other Person in
                    connection with the release of such property from the
                    Lien of this Indenture on the basis of the deposit with
                    the Trustee or the trustee or other holder of a Lien
                    prior to the Lien of this Indenture of obligations
                    secured by such Lien on such property (as well as any
                    other property subject thereto);

                              (d) is held by a trustee or agent for the
                    benefit of one or more Persons described in clause (a),
                    (b) and/or (c) above, provided that such Lien may be
                    held, in addition, for the benefit of one or more other
                    Persons which shall have theretofore given, or may
                    thereafter give, value to or for the benefit or account
                    of the grantor of such Lien for one or more other
                    purposes; or

                              (e) otherwise constitutes a purchase money
                    mortgage or a purchase money security interest under
                    applicable law;

                         and, without limiting the generality of the
                         foregoing, for purposes of this Indenture, the
                         term shall be deemed to include any Lien described
                         above whether or not such Lien (x) shall permit
                         the issuance or other incurrence of additional
                         indebtedness secured by such Lien on such
                         property, (y) shall permit the subjection to such
                         Lien of additional property and the issuance or
                         other incurrence of additional indebtedness on the
                         basis thereof and/or (z) shall have been granted
                         prior to the acquisition, disposition or release
                         of such property, shall attach to or otherwise
                         cover property other than the property being
                         acquired, disposed of or released and/or shall
                         secure obligations issued prior and/or subsequent
                         to the issuance of the obligations delivered in
                         connection with such acquisition, disposition or
                         release.

                         (E)  the addition to the Original Indenture of a
                    definition of the term "fair value" substantially to
                    the following effect:

                              "FAIR VALUE", with respect to property, means
                    the fair value of such property as may be determined by
                    reference to (a) the amount which would be likely to be
                    obtained in an arm's-length transaction with respect to
                    such property between an informed and willing buyer and
                    an informed and willing seller, under no compulsion,
                    respectively, to buy or sell, (b) the amount of
                    investment with respect to such property which,
                    together with a reasonable return thereon, would be
                    likely to be recovered through ordinary business
                    operations or otherwise, (c) the Cost, accumulated
                    depreciation and replacement cost with respect to such
                    property and/or (d) any other relevant factors;
                    provided, however, that (x) the fair value of property
                    shall be determined without deduction for any Liens on
                    such property prior to the Lien of this Indenture
                    (except as otherwise provided in Section 803) and (y)
                    the fair value to the Company of Property Additions
                    shall not reflect any reduction relating to the fact
                    that such Property Additions may be of less value to a
                    Person which is not the owner or operator of the
                    Mortgaged Property or any portion thereof than to a
                    Person which is such owner or operator.  Fair value may
                    be determined, without physical inspection, by the use
                    of accounting and engineering records and other data
                    maintained by the Company or otherwise available to the
                    Engineer certifying the same.

                    IN WITNESS WHEREOF, I have executed this Officer's
          Certificate this     day of      ,     .
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