Exhibit 5-A

                                                                 August 29, 2003


Duke Energy Corporation
526 South Church Street
Charlotte, North Carolina 28202

Dear Sirs:

      I am acting as counsel to Duke Energy Corporation (the "Corporation") in
connection with the preparation of a Registration Statement on Form S-3 to be
filed today with the Securities and Exchange Commission under the Securities Act
of 1933, as amended, relating to the proposed issuance and sale of up to
$2,000,000,000 of the Corporation's Senior Notes ("Senior Notes"), Junior
Subordinated Notes ("Junior Subordinated Notes"), First and Refunding Mortgage
Bonds ("Bonds"), Common Stock without par value ("Common Stock"), contracts to
purchase shares of Common Stock ("Stock Purchase Contracts") and/or units, each
comprised of a Stock Purchase Contract and either Senior Notes, Junior
Subordinated Notes, other debt securities of the Corporation or one of its
subsidiaries, debt obligations of third parties (including U.S. Treasury
securities), Preferred Securities (as hereinafter defined) or preferred
securities issued by a trust of which a subsidiary of the Corporation owns all
the common securities, in each such case pledged to secure the holder's
obligations to purchase Common Stock under the Stock Purchase Contract ("Stock
Purchase Units"), and/or Preferred Securities (liquidation amount $ per
Preferred Security) ("Preferred Securities") of Duke Energy Capital Trust III,
Duke Energy Capital Trust IV and/or Duke Energy Capital Trust V, all as
contemplated in the above-mentioned Registration Statement. Such Registration
Statement also relates to the proposed issuance of the Corporation's Guarantees
(as defined in such Registration Statement), Junior Subordinated Notes with
respect to the Preferred Securities ("Trust Preferred Junior Subordinated
Notes") and Stock Purchase Contracts with respect to the Stock Purchase Units,
each as contemplated by such Registration Statement.

      As Associate General Counsel and Assistant Secretary of the Corporation, I
am familiar with the Articles of Incorporation and By-Laws of the Corporation,
both as amended to date, the form of supplemental indenture relating to the
Senior Notes (the "Senior Notes Supplemental Indenture") supplementing the
Senior Indenture dated as of September 1, 1998 from the Corporation to JPMorgan
Chase Bank, as Trustee, as heretofore supplemented (the "Senior Indenture"), the
form of supplemental indenture relating to the Junior Subordinated Notes (the
"Subordinated Notes Supplemental Indenture") supplementing the Subordinated
Indenture dated as of December 1, 1997 from the Corporation to JPMorgan Chase
Bank, as Trustee, as heretofore supplemented (the "Subordinated Indenture"), the
form of supplemental indenture relating to the Trust Preferred Junior
Subordinated Notes (the "Trust Preferred Subordinated Notes Supplemental
Indenture") supplementing the Subordinated Indenture, the form of supplemental

indenture relating to the Bonds (the "Bonds Supplemental Indenture")
supplementing the First and Refunding Mortgage, dated as of December 1, 1927,
from the Corporation to JPMorgan Chase Bank, as successor Trustee, as heretofore
supplemented and amended (the "First and Refunding Mortgage"), and the form of
Guarantee Agreement between the Corporation and the trustee named therein (the
"Guarantee Agreement") relating to the Guarantees. I have also made such
examination of corporate records and proceedings and other documents and
questions of law as I have considered necessary for the purposes of this
opinion.

      Based upon the foregoing, I am of the opinion that:

            (1) The Corporation has been duly incorporated and is validly
      existing as a corporation in good standing under the laws of the State of
      North Carolina.

            (2) Upon (a) the above-mentioned Registration Statement under the
      Securities Act of 1933, as amended, becoming effective; (b) compliance
      with any applicable securities or blue sky laws; (c) the Senior Indenture,
      as to be supplemented by the Senior Notes Supplemental Indenture, having
      qualified under the Trust Indenture Act of 1939, as amended; (d) the
      execution and delivery of the Senior Notes Supplemental Indenture; (e) the
      execution, authentication and delivery of the Senior Notes in accordance
      with resolutions to be adopted by the Chief Executive Officer of the
      Corporation pursuant to authority expressly granted to him by the Board of
      Directors of the Corporation and in accordance with the provisions of the
      Senior Indenture as to be supplemented by the Senior Notes Supplemental
      Indenture; and (f) the issuance and sale of the Senior Notes in accordance
      with resolutions to be adopted by the Chief Executive Officer of the
      Corporation pursuant to authority expressly granted to him by the Board of
      Directors of the Corporation and in accordance with appropriate orders of
      the North Carolina Utilities Commission and The Public Service Commission
      of South Carolina, the Senior Notes will be valid, binding and legal
      obligations of the Corporation in accordance with their terms, except as
      limited by bankruptcy, insolvency or other laws affecting the enforcement
      of creditors' rights.

            (3) Upon (a) the above-mentioned Registration Statement under the
      Securities Act of 1933, as amended, becoming effective; (b) compliance
      with any applicable securities or blue sky laws; (c) the Subordinated
      Indenture, as to be supplemented by the Subordinated Notes Supplemental
      Indenture, having qualified under the Trust Indenture Act of 1939, as
      amended; (d) the execution and delivery of the Subordinated Notes
      Supplemental Indenture; (e) the execution, authentication and delivery of
      the Junior Subordinated Notes in accordance with resolutions to be adopted
      by the Chief Executive Officer of the Corporation pursuant to authority
      expressly granted to him by the Board of Directors of the Corporation and
      in accordance with the provisions of the Subordinated Indenture as to be
      supplemented by the Subordinated Notes Supplemental Indenture; and (f) the
      issuance and sale of the Junior Subordinated Notes in accordance with
      resolutions to be adopted by the Chief Executive Officer of the
      Corporation pursuant to authority expressly granted to him by the Board of
      Directors of the Corporation and in accordance with appropriate orders of
      the North Carolina Utilities Commission and The Public Service Commission
      of South Carolina, the Junior Subordinated Notes will be valid,


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      binding and legal obligations of the Corporation in accordance with their
      terms, except as limited by bankruptcy, insolvency or other laws affecting
      the enforcement of creditors' rights.

            (4) Upon (a) the above-mentioned Registration Statement under the
      Securities Act of 1933, as amended, becoming effective; (b) compliance
      with any applicable securities or blue sky laws; (c) the First and
      Refunding Mortgage, as to be supplemented by the Bonds Supplemental
      Indenture, having qualified under the Trust Indenture Act of 1939, as
      amended; (d) the execution and delivery of the Bonds Supplemental
      Indenture; (e) the execution, authentication and delivery of the Bonds in
      accordance with resolutions to be adopted by the Chief Executive Officer
      of the Corporation pursuant to authority expressly granted to him by the
      Board of Directors of the Corporation and in accordance with the
      provisions of the First and Refunding Mortgage as to be supplemented by
      the Bonds Supplemental Indenture; and (f) the issuance and sale of the
      Bonds in accordance with resolutions to be adopted by the Chief Executive
      Officer of the Corporation pursuant to authority expressly granted to him
      by the Board of Directors of the Corporation and in accordance with
      appropriate orders of the North Carolina Utilities Commission and The
      Public Service Commission of South Carolina, the Bonds will be valid,
      binding and legal obligations of the Corporation in accordance with their
      terms, except as limited by bankruptcy, insolvency or other laws affecting
      the enforcement of mortgagees' and other creditors' rights.

            (5) Upon (a) the above-mentioned Registration Statement under the
      Securities Act of 1933, as amended, becoming effective; (b) compliance
      with any applicable securities or blue sky laws; (c) the issuance and sale
      of the Common Stock in accordance with resolutions to be adopted by the
      Chief Executive Officer of the Corporation pursuant to authority expressly
      granted to him by the Board of Directors of the Corporation, in accordance
      with appropriate orders of the North Carolina Utilities Commission and The
      Public Service Commission of South Carolina, and, if issued pursuant to
      Stock Purchase Contracts or Stock Purchase Units, in accordance with the
      terms thereof; and (d) the receipt by the Corporation of the full purchase
      price thereof, the Common Stock will be duly authorized, validly issued,
      fully paid and nonassessable.

            (6) Upon (a) the above-mentioned Registration Statement under the
      Securities Act of 1933, as amended, becoming effective; (b) compliance
      with any applicable securities or blue sky laws; (c) the fixing and
      determination of the terms of the Stock Purchase Contracts and/or the
      Stock Purchase Units in accordance with resolutions to be adopted by the
      Chief Executive Officer of the Corporation pursuant to authority expressly
      granted to him by the Board of Directors of the Corporation; (d) the
      execution and delivery of the agreements relating to the issuance of the
      Stock Purchase Contracts and/or the Stock Purchase Units; (e) the
      execution and delivery of the Stock Purchase Contracts and/or the Stock
      Purchase Units in accordance with resolutions to be adopted by the Chief
      Executive Officer of the Corporation pursuant to authority expressly
      granted to him by the Board of Directors of the Corporation and in
      accordance with the above-mentioned agreements; and (f) the issuance and
      sale of the Stock Purchase Contracts and/or the Stock Purchase Units in
      accordance with resolutions to be adopted by the


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      Chief Executive Officer of the Corporation pursuant to authority expressly
      granted to him by the Board of Directors of the Corporation and in
      accordance with appropriate orders of the North Carolina Utilities
      Commission and The Public Service Commission of South Carolina, the Stock
      Purchase Contracts and/or the Stock Purchase Units will be valid, binding
      and legal obligations of the Corporation in accordance with their terms,
      except as limited by bankruptcy, insolvency or other laws affecting the
      enforcement of creditors' rights.

            (7) Upon (a) the above-mentioned Registration Statement under the
      Securities Act of 1933, as amended, becoming effective; (b) compliance
      with any applicable securities or blue sky laws; (c) the Subordinated
      Indenture, as to be supplemented by the Trust Preferred Subordinated Notes
      Supplemental Indenture, and the Guarantee Agreements having qualified
      under the Trust Indenture Act of 1939, as amended; (d) the execution and
      delivery of the Trust Preferred Subordinated Notes Supplemental Indenture
      and of the Guarantee Agreements; (e) the execution, authentication and
      delivery of the Trust Preferred Junior Subordinated Notes in accordance
      with the Trust Preferred Subordinated Notes Supplemental Indenture and of
      the Guarantees in accordance with the Guarantee Agreements; and (f) the
      issuance of the Trust Preferred Junior Subordinated Notes and of the
      Guarantees, in each case in accordance with resolutions to be adopted by
      the Chief Executive Officer of the Corporation pursuant to authority
      expressly granted to him by the Board of Directors of the Corporation and
      in accordance with appropriate orders of the North Carolina Utilities
      Commission and The Public Service Commission of South Carolina, the Trust
      Preferred Junior Subordinated Notes and the Guarantees will be valid,
      binding and legal obligations of the Corporation in accordance with their
      terms, except as limited by bankruptcy, insolvency or other laws affecting
      the enforcement of creditors' rights.

      I am a member of the bar of the State of North Carolina and the foregoing
opinion is limited solely to the laws of that State.

      I hereby consent to the filing of this opinion with the Securities and
Exchange Commission as an exhibit to the above-mentioned Registration Statement
and to the use of my name and the reference made to me under the captions
"Validity of the Securities" in such Registration Statement. Except as stated
above, without my prior written consent, this opinion may not be furnished or
quoted to, or relied upon by, any other person for any purpose.

                                           Very truly yours,

                                           /s/ Robert T. Lucas III
                                           ---------------------------
                                           Robert T. Lucas III
                                           Associate General Counsel and
                                           Assistant Secretary


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