PNY Piedmont Natural Gas Company, Inc.

DESCRIPTION OF THE NOTES

        The following description of the particular terms of the Notes supplements and, to the extent inconsistent therewith, replaces the description of the general terms and provisions of the Notes set forth in the accompanying prospectus under "Description of Debt Securities," to which reference is hereby made. Whenever a defined term is referred to and not herein defined, the definition thereof is contained in the accompanying prospectus or in the Indenture referred to therein. As used in this section, the terms "we," "us," "our," "the Company," and "Piedmont" refer to Piedmont Natural Gas Company, Inc. only and not to its subsidiaries.

        We will issue the Notes as a new series of Debt Securities under an indenture, dated as of April 1, 1993 (the "Original Indenture"), between the Company and The Bank of New York Mellon Trust Company, N.A., as successor trustee (the "Trustee"). The Original Indenture is supplemented by various supplemental indentures, including by the Tenth Supplemental Indenture to be dated as of May     , 2020, which establishes the specific terms of the Notes. In the following discussion, we will refer to the Original Indenture and all indentures supplemental to the Original Indenture together as the "Indenture."

        The following description, together with the "Description of Debt Securities" in the accompanying prospectus, is a summary of the material provisions of the Notes and the Indenture and does not purport to be complete. This summary is subject to and is qualified by reference to all the provisions of the Notes and the Indenture, including the definition of certain terms used in the Indenture. We urge you to read the Indenture because it, and not this description, defines your rights as a holder of the Notes.

General

        The terms of the Notes include those expressly set forth in the Indenture and those made part of the Indenture by reference to the Trust Indenture Act of 1939, as amended. The Notes will initially be limited to $         million aggregate principal amount and will mature on June 1, 2050. If the maturity date for the Notes falls on a day that is not a Business Day, the payment due on the maturity date will be made on the next succeeding day which is a Business Day (and without any additional interest or other payment in respect of any delay).

        The Notes will bear interest at the rate per annum set forth on the cover page of this prospectus supplement from the date of issuance or from the most recent interest payment date to which interest has been paid or provided for, payable semi-annually in arrears on June 1 and December 1 of each year, beginning on December 1, 2020, to the persons in whose name each Note is registered at the close of business on the record date for the applicable interest payment date, which will be the close of business on (i) the business day immediately preceding such interest payment date so long as all of the Notes remain in the form of a Book-Entry Debt Security or (ii) the fifteenth calendar day next preceding such interest payment date (whether or not such day is a Business Day) if any of the Notes do not remain in the form of a Book-Entry Debt Security. Interest will be computed on the basis of a 360-day year comprised of twelve 30-day months (and for any partial periods shall be calculated on the basis of the number of days elapsed in a 360-day year of twelve 30-day months). If any date on which interest is payable on the Notes is not a Business Day, then payment of the interest payable on that date will be made on the next succeeding day which is a Business Day (and without any additional interest or other payment in respect of any delay). The term "Business Day" means any day which is not a Saturday, a Sunday or a day on which banks and trust companies in New York, New York, or Charlotte, North Carolina, are authorized or obligated by law, regulation or executive order to remain closed.

        The Notes will be our direct, senior unsecured and unsubordinated obligations, exclusively, and not the obligation of any of our affiliates. The Notes will rank equally in right of payment with all of our

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existing and future senior unsecured indebtedness and be effectively subordinated (to the extent of underlying collateral) to any of our secured indebtedness now outstanding or that we may incur in the future. As of March 31, 2020, we had approximately $2.4 billion of unsecured indebtedness and no outstanding secured indebtedness.

        The Notes will be issued only in registered form in minimum denominations of $2,000 and in integral multiples of $1,000 in excess thereof.

        We will initially offer $         million aggregate principal amount of the Notes. Subject to the terms of the Indenture, we may, at any time, without the consent of the holders of the Notes, create and issue additional Debt Securities having the same ranking, interest rate, maturity and other terms as the Notes being offered hereby (except for the issue date, the issue price and, if applicable, the first interest payment date); provided, however, that such additional Debt Securities must be fungible with the Notes for U.S. federal income tax purposes, and any such additional Debt Securities, together with the Notes, will be taken to constitute the same series of Debt Securities under the Indenture.

        We will be entitled to defease the Notes subject to compliance with the terms of the Indenture. See "Description of Debt Securities—Satisfaction and Discharge" in the accompanying prospectus. We may at any time purchase Notes at any price in the open market, by tender or by private agreement, subject to applicable law (including, without limitation, federal securities laws). The Notes will not be entitled to the benefit of a sinking fund.

Optional Redemption

        At any time before December 1, 2049 (which is the date that is six months prior to the maturity date of the Notes (the "Par Call Date")), we will have the right to redeem the Notes, at our option, in whole or in part and from time to time, at a redemption price equal to the greater of (1) 100% of the principal amount of the Notes being redeemed and (2) the sum of the present values of the remaining scheduled payments of principal and interest on the Notes being redeemed that would be due if the Notes matured on the Par Call Date (exclusive of interest accrued to the redemption date), discounted to the redemption date on a semi-annual basis (assuming a 360-day year consisting of twelve 30-day months) at the Treasury Rate plus          basis points, plus, in either case, accrued and unpaid interest on the principal amount of the Notes being redeemed to, but excluding, such redemption date.

        At any time on or after the Par Call Date, we will have the right to redeem the Notes, at our option, in whole or in part and from time to time, at a redemption price equal to 100% of the principal amount of the Notes being redeemed plus accrued and unpaid interest on the principal amount of the Notes being redeemed to, but excluding, such redemption date.

        Notwithstanding the foregoing, installments of interest on Notes that are due and payable on interest payment dates falling on or prior to a redemption date will be payable on the interest payment date to the registered holders as of the close of business on the relevant record date according to the Notes and the Indenture.

        For purposes of the optional redemption provisions, the following terms have the following meanings:

        "Comparable Treasury Issue" means the United States Treasury security selected by the Quotation Agent as having an actual or interpolated maturity comparable to the remaining term of the Notes to be redeemed (assuming, for this purpose, that the Notes matured on the Par Call Date), that would be utilized, at the time of selection and in accordance with customary financial practice, in pricing new issues of corporate debt securities of a comparable maturity to the remaining term of the Notes.

        "Comparable Treasury Price" means, with respect to any redemption date, (A) the average of the Reference Treasury Dealer Quotations for such redemption date, after excluding the highest and lowest

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of such Reference Treasury Dealer Quotations, or (B) if the Quotation Agent obtains fewer than four of such Reference Treasury Dealer Quotations, the average of all such Reference Treasury Dealer Quotations as determined by us.

        "Quotation Agent" means one of the Reference Treasury Dealers appointed by us.

        "Reference Treasury Dealer" means each of (i) Mizuho Securities USA LLC, Morgan Stanley & Co. LLC and RBC Capital Markets, LLC, each of which is a primary U.S. Government securities dealer in the United States (a "Primary Treasury Dealer") and (ii) a Primary Treasury Dealer selected by each of PNC Capital Markets LLC, SMBC Nikko Securities America, Inc. and U.S. Bancorp Investments, Inc., or their respective affiliates or successors; provided, however, that if any of the foregoing or their affiliates or successors shall cease to be a Primary Treasury Dealer, we shall substitute therefor another Primary Treasury Dealer.

        "Reference Treasury Dealer Quotations" means, with respect to each Reference Treasury Dealer and any redemption date, the average, as determined by the Quotation Agent, 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 Quotation Agent by such Reference Treasury Dealer at 5:00 p.m., New York City time, on the third Business Day (as defined in the Indenture) preceding such redemption date.

        "Treasury Rate" means, with respect to any redemption date, the rate per annum equal to the semi-annual equivalent yield to maturity or interpolated maturity (on a day count basis) 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.

        Notice of any redemption will be mailed at least 10 days but not more than 60 days before the redemption date to each holder of the Notes to be redeemed. Unless we default in payment of the redemption price, on and after the redemption date, interest will cease to accrue on the Notes or portions thereof called for redemption. So long as the Notes are registered in the name of DTC or its nominee, if less than all of the Notes are to be redeemed, the particular Notes or portions of such Notes to be redeemed will be selected by DTC in such manner as it shall determine.

        Notwithstanding the foregoing, any notice of redemption at our option may state that such redemption will be conditional upon receipt by the Trustee on or prior to the date fixed for such redemption, of money sufficient to pay the principal of and premium, if any, and interest on, such Notes and that if such money has not been so received, such notice will be of no force and effect and we will not be required to redeem such Notes.

DESCRIPTION OF DEBT SECURITIES

        The following description sets forth general terms and provisions of the debt securities that we may offer with this prospectus. We will provide additional or different terms of the debt securities in the applicable prospectus supplement.

        The debt securities will be unsecured obligations of Piedmont Natural Gas Company and will either be senior or subordinated debt. We will issue senior debt securities under a senior indenture, dated as of April 1, 1993, as supplemented to the date hereof, between Piedmont Natural Gas Company and The Bank of New York Mellon Trust Company, N.A., as successor trustee to Citibank, N.A (the "Senior Indenture"). We will issue subordinated debt securities, which may include junior subordinated debt securities, under a subordinated indenture between us and The Bank of New York Mellon Trust Company, N.A., as trustee (the "Subordinated Indenture"). The Senior Indenture and the Subordinated Indenture are sometimes referred to in this prospectus individually as an "Indenture" and collectively as the "Indentures." References to the "Trustee" means The Bank of New York Mellon Trust Company, N.A., as successor trustee to Citibank, N.A., or any other successor trustee under the Indentures. Unless otherwise specified in this prospectus, references to the "Debt Securities" means the senior debt securities and subordinated debt securities issued under the Indentures, and the descriptions of Debt Securities describe both the senior Debt Securities and the subordinated Debt Securities unless otherwise specified in this prospectus or any prospectus supplement.

        Because this section is a summary of some of the terms of the Indentures, it does not describe every aspect of the Debt Securities. You should refer to the applicable Indenture for a complete description of its provisions and the definitions of terms used in it, because such Indenture, and not this description, will define your rights as a holder of Debt Securities. Whenever we refer to particular sections or defined terms of the Indentures in this prospectus or in any applicable supplement, we are incorporating by reference those sections or defined terms in this prospectus or the applicable prospectus supplement.

        The Senior Indenture and the form of Subordinated Indenture are exhibits to the registration statement. See "Where You Can Find More Information" for information on how to obtain a copy of the Indentures and any supplements.

General Terms of Our Debt Securities

        The Debt Securities may be issued from time to time in one or more series. The Indentures do not limit the aggregate principal amount of Debt Securities that we may issue under either Indenture at any time or from time to time in one or more series.

        The particular terms of each issue of Debt Securities, as well as any modifications or additions to the general terms of the Indenture applicable to the issue of Debt Securities, will be described in the applicable prospectus supplement. You should read the applicable prospectus supplement for some or all of the following terms of the series of Debt Securities offered by such supplement, as applicable:

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the title of the offered Debt Securities;



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any limit on the aggregate principal amount of the offered Debt Securities;



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the person to whom any interest on the offered Debt Securities will be payable, if other than the person in whose name that offered Debt Security is registered at the close of business on the record date for such interest and the relevant record dates for the payment of interest;



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the date or dates on which the principal of the offered Debt Securities is payable;



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the rate or rates at which the offered Debt Securities will bear interest, if any, or the formula that will be used to determine such rate or rates, the date or dates from which any such interest

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will accrue and the date or dates for any interest payable and the record dates for interest payable;

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the place or places where the principal, premium (if any) and interest on the offered Debt Securities will be payable and the method of such payment;



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the period or periods within which the price or prices at which and the terms and conditions upon which the offered Debt Securities may be redeemed, in whole or in part, at our option;



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our obligations, if any, to purchase or redeem the offered Debt Securities under any sinking fund or analogous provision or at the option of holders of such securities and the period or periods within which, the price or prices at which and the terms and conditions upon which the offered Debt Securities will be redeemed or purchased, in whole or in part, pursuant to such obligation;



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the denominations in which the offered Debt Securities will be issuable, if other than denominations of $1,000 and any integral multiple thereof; if the amount of payments of principal, premium (if any) or interest on the offered Debt Securities may be determined with reference to an index, the manner in which such amounts shall be determined;



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whether the offered Debt Securities will be issuable in whole or in part in the form of one or more global securities and, if so, the securities depository or depositories for such global security or securities and the circumstances under which any such global security or securities may be registered for transfer or exchange, or authenticated and delivered, in the name of a person other than such depository or its nominee, other than as set forth in the Indenture;



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any provisions for conversion into or exchange of the Debt Securities for other securities of Piedmont Natural Gas Company or any other entity, including the terms of any mandatory conversion;



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if other than the principal amount thereof, the portion of the principal amount of the offered Debt Securities which shall be payable upon declaration of acceleration of the maturity thereof;



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any modification, amendment or addition to our covenants;



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whether the offered Debt Securities will be subject to defeasance or covenant defeasance or other means of satisfaction and discharge;



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any additional events of default; and



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any other terms or provisions of the offered Debt Securities not inconsistent with the provisions of the applicable Indenture.

        We may issue Debt Securities with terms different from those of Debt Securities already issued and outstanding. There is no requirement that we issue Debt Securities in the future under either Indenture, and we may use other indentures or documentation, containing different provisions, in connection with future issues of other Debt Securities.

        Unless the applicable prospectus supplement provides differently, we will issue the Debt Securities in fully registered form without coupons and in denominations of $1,000 or any integral multiple of $1,000. Unless the applicable prospectus supplement provides differently, the Trustee will register the transfer of any Debt Securities at its offices. There will be no service charge for any registration of transfer or exchange of the Debt Securities, although we may require that purchasers of the Debt Securities pay any tax or other governmental charge associated with the registration.

        We may issue Debt Securities as original issue discount securities, to be sold at a discount below their principal amount. The applicable prospectus supplement will describe any special federal income tax and other considerations applicable to such securities.

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Exchange Registration and Transfer

        We will not be required to exchange or register a transfer of (i) any series of Debt Securities for a period of 15 days next preceding the giving of the notice of any redemption of such series or (ii) any such series selected, called or being called for redemption except, in the case of any such series to be redeemed in part, that portion not being redeemed.

Redemption

        Any terms for the optional or mandatory redemption of the Debt Securities will be set forth in the applicable prospectus supplement. Except as shall otherwise be provided with respect to the Debt Securities redeemable at the option of the holder, Debt Securities will be redeemable only upon notice, given in accordance with the applicable Indenture, not less than 30 nor more than 60 days prior to the date fixed for redemption, except as otherwise set forth in the applicable prospectus supplement, and, if less than all of a series of Debt Securities are to be redeemed, the Trustee shall select the particular Debt Securities to be redeemed in such manner as it deems fair and appropriate; provided, however, that global Debt Securities that are to be partially redeemed shall be selected in accordance with the procedures of the relevant depositary. The Indentures limit our ability to redeem Debt Securities if an event of default has occurred and is continuing.

Covenants

        Under the Senior Indenture, we have agreed to three principal restrictions on our activities for the benefit of holders of the senior Debt Securities. The restrictive covenants summarized below will apply to a series of senior Debt Securities (unless waived or amended) as long as any of those senior Debt Securities are outstanding or unless the prospectus supplement for the series states otherwise.

        The covenants contained in the Indentures and the Debt Securities would not necessarily afford holders protection in the event of a highly leveraged or other transaction involving us that may adversely affect holders. The existing protective covenants applicable to the Debt Securities would continue to apply to us in the event of a leveraged buyout initiated or supported by us, our management or any of our affiliates or their management, but may not prevent such a transaction from taking place.

        Property.    To the extent necessary for our business to be properly conducted, in our judgment, we will cause (or, with respect to property owned in common with others, make reasonable effort to cause) all of our properties used or useful in the conduct of our business to be maintained and kept in good condition, repair and working order. We will also cause (or, with respect to property owned in common with others, make reasonable effort to cause) all necessary repairs, renewals, replacements, betterments and improvements to be made to such properties. This covenant does not prevent us from discontinuing, or causing the discontinuance of, the operation and maintenance of any of our properties if such discontinuance is, in our judgment, desirable in the conduct of our business.

        Limitation on Liens.    We will not create, assume or suffer to exist, and will not permit, cause or suffer any subsidiary to create, assume or suffer to exist, except in our favor, any mortgage, pledge or other lien or encumbrance of or upon any of our or its properties or assets (including stock and other securities of subsidiaries) without making effective provisions to secure equally and ratably the senior Debt Securities then outstanding and other indebtedness entitled to be so secured, except that we or a subsidiary, without so securing the senior Debt Securities, may create, assume or suffer to exist:

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certain purchase money and existing liens in connection with property acquisitions and the extension, renewal or refunding of the same;



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pledges of current assets, in the ordinary course of business, to secure current liabilities;

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liens on property to secure obligations to pay all or a part of the purchase price of such property only out of or measured by oil or gas production or the proceeds thereof, or liens upon production from oil and gas property or the proceeds of such production, to secure obligations to pay all or part of the expenses of exploration, drilling or development of such property only out of such production or proceeds;



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mechanics' or materialman's liens, good faith deposits in connection with tenders, leases of real estate, bids or contracts (other than contracts for the payments of money), deposits to secure public or statutory obligations, deposits to secure, or in lieu of, surety, stay or appeal bonds and deposits as security for payment of taxes or assessments or similar charges and liens or security interests given in connection with bid or completion bonds;



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liens arising by reason of deposits with, or the giving of security to, a governmental agency as a condition to the transaction of business or the exercise of a privilege or license, or to enable us or a subsidiary to maintain self-insurance or participate in any funds established to cover any insurance risks in connection with workmen's compensation, unemployment insurance, old age pension or other social security, or to share in the privileges or benefits required for companies participating in such arrangements;



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pledges or assignments of accounts receivable, including customers' installment paper, to banks or others (including to or by any subsidiary which is principally engaged in the business of financing our business and the business of our subsidiaries) made in the ordinary course of business;



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liens of taxes or assessments that are (1) for the current year, (2) not due or (3) already due but are being contested in good faith and against which an adequate reserve has been established;



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judgments or liens the finality of which is being contested and execution on which is stayed;



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assessments or similar encumbrances the existence of which does not impair the use of the property subject thereto for the purposes for which it was acquired;



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certain landlords' liens so long as the rent secured thereby is not in default;



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liens on the assets of any limited liability company organized under a limited liability company act of any state in which a limited liability company is permitted to be treated as a partnership or disregarded for federal income tax purposes; and



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liens not otherwise permitted if, at the time, and after giving effect thereto, the creation or assumption of any lien, the aggregate amount of all of our consolidated indebtedness secured by such liens does not exceed 10% of our Consolidated Total Assets. "Consolidated Total Assets" means, as of any determination date, the total assets of us and our subsidiaries as set forth or reflected on our most recent consolidated balance sheet, prepared in accordance with generally accepted accounting principles in the United States.

        For purposes of this covenant, a "subsidiary" is any corporation, partnership, joint venture, limited liability company or other business entity of which a majority of the shares of securities or other interests having ordinary voting power for the election of directors or other governing body (other than securities or interests having such power only by reason of the happening of a contingency) are at the time beneficially owned, or the management of which is otherwise controlled, by us directly or indirectly through one or more intermediaries.

        Corporate Existence.    Subject to the provisions described under the heading "Consolidation, Merger or Sale," we will do or cause to be done all things necessary to preserve and keep in full force and effect our and our subsidiaries' corporate existence, rights (charter and statutory) and franchises. We will not be required to preserve, or cause any subsidiary to preserve, any such right or franchise or

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to keep in full force and effect the corporate existence of any subsidiary if, the Company determines preservation is no longer desirable in the conduct of our business and the loss thereof is not disadvantageous in any material respect to the holders of any series of senior Debt Securities.

Consolidation, Merger or Sale

        We may not merge into or consolidate with any other corporation, or sell or convey our properties and assets substantially as an entirety to any person, unless:

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either we shall be the continuing corporation, or the successor corporation (if other than us) shall be a corporation organized and existing under the laws of the United States or a state thereof or the District of Columbia and such corporation shall expressly assume, by supplemental indenture, the due and punctual payment of the principal, premium (if any) and interest on all the Debt Securities under the applicable Indenture and the due and punctual performance and observance of all of our covenants and conditions under the applicable Indenture;



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we or such successor corporation, as the case may be, shall not, immediately after such merger or consolidation, or such sale or conveyance, be in default in the performance of any such covenant or condition; and



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we satisfy other conditions described in the applicable Indenture.

        Because there is no definitive standard under the laws of the State of New York that clearly defines the threshold for the sale or conveyance of substantially all of our assets, it may be difficult for the holders of our Debt Securities to: (1) determine whether our covenant (relating to merger, consolidation and sale of assets) has been breached, (2) declare an event of default and (3) exercise their acceleration rights. In addition, there can be a difference in understanding between us and the holders of our Debt Securities regarding whether a specific asset sale or sales triggers a sale of "substantially all" of our assets. Lastly, in the event that the holders of our Debt Securities elect to exercise their rights under either Indenture and we contest such election, there could be no assurance as to how a court interpreting New York law would interpret the phrase "substantially all."

Payment and Paying Agent

        The principal, premium (if any) and interest (if any) on Debt Securities not represented by a global security will be payable in immediately available funds at the office or agency of the paying agent or paying agents as we may designate from time to time, provided that, at our option, interest may be paid by check mailed to the holders entitled thereto at their last addresses as they appear in the Debt Security Register. The Trustee is designated as our sole paying agent and its principal corporate trust office in the Borough of Manhattan, the City of New York, is the office where the Debt Securities may be presented for payment, for the registration of transfer and for exchange and where notices and demands to or upon us in respect of the Debt Securities or of the Indentures may be served. Unless otherwise indicated in the applicable prospectus supplement, interest payments shall be made to the person in whose name any debt security is registered at the close of business on the record date with respect to an interest payment date. All moneys paid by us to a paying agent for the payment of principal, premium (if any) or interest on any Debt Security of any series which remain unclaimed at the end of two years after such principal, premium or interest shall have become due and payable will be repaid to us upon request, and the holder of such Debt Security will thereafter look only to us for payment thereof.

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Events of Default and Rights of Acceleration

        The following are events of default under the Indentures with respect to any series of Debt Securities, unless it is either inapplicable to a particular series or is specifically deleted or modified in any supplemental indenture or board resolution under which such series is issued:

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default in the payment of the principal or premium (if any) on any of the Debt Securities of such series when due and payable;



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default in the payment of any installment of interest upon any of the Debt Securities of such series when due and payable, and continuance of such default for a period of 30 days;



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default in the payment of any sinking or purchase fund payment or analogous obligation with respect to such series when due and payable;



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failure by us to observe or perform any other of our covenants or agreements in the Debt Securities or the applicable Indenture for a period of 90 days after written notice of such failure, requiring us to remedy such failure, has been given to us by the Trustee or to us and the Trustee by the holders of at least 25% in principal amount of the outstanding Debt Securities of that series;



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a default under any bond, debenture, note or other evidence of indebtedness for money borrowed by us (including a default with respect to Debt Securities of any series other than that series) or under any mortgage, indenture or instrument under which there may be issued or by which there may be secured or evidenced any indebtedness for money borrowed by us (including the Indenture) whether such indebtedness now exists or shall hereafter be created, which default shall constitute a failure to pay in excess of $50,000,000 principal amount of such indebtedness when due and payable after the expiration of any applicable grace period with respect thereto or shall have resulted in an excess of $50,000,000 of principal amount of such indebtedness becoming or being declared due and payable prior to the date on which it would otherwise have become due and payable, without such indebtedness having been discharged, or such acceleration having been rescinded or annulled, within 10 days after notice has been given to us by the Trustee or to us and the Trustee by the holders of at least 25% in principal amount of the outstanding Debt Securities of that series specifying such default and requiring us to cause such indebtedness to be discharged or such acceleration to be rescinded or annulled and stating that such notice is a "Notice of Default" under the Indenture; or



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certain events in bankruptcy, insolvency or other similar occurrences as more fully described in the Indentures.

        The applicable prospectus supplement will describe any additional events of default that may be added to the Indentures for a particular series of Debt Securities.

        Each of the Indentures provides that if an event of default described in clause (a), (b), (c), (d) or (e) has occurred and is continuing, and in each and every such case, unless the principal amount of all the Debt Securities of such series has already become due and payable, either the Trustee or the holders of not less than 25% in aggregate principal amount of the Debt Securities of each series affected thereby then outstanding (voting as one class), by notice to us (and to the Trustee if given by securityholders) may declare the principal amount of all the Debt Securities (or, with respect to original issue discount Debt Securities, such lesser amount as may be specified in the terms of such Debt Securities) affected thereby to be due and payable immediately, or, if an event of default described in clause (f) has occurred and is continuing, and unless the principal of all the Debt Securities of such series has already become due and payable, either the Trustee or the holders of not less than 25% in aggregate principal amount of all the Debt Securities then outstanding (voting as one class), by notice to us (and to the Trustee if given by securityholders), may declare the principal of all

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the Debt Securities (or, with respect to original issue discount Debt Securities, such lesser amount as may be specified in the terms of such Debt Securities) to be due and payable immediately. The holders of a majority in principal amount of the outstanding Debt Securities of all series affected thereby (voting as one class) may waive our compliance of covenants or conditions provided for in the applicable Indenture. In some circumstances, the holders of a majority in principal amount of the outstanding Debt Securities of each series may, on behalf of the holders of all the Debt Securities of such series, waive any past default or rescind and annul a declaration of acceleration and its consequences under the applicable Indenture, except a default (1) in the payment of principal, premium (if any) or interest on any Debt Security of such series or (2) in respect of a covenant or provision of the Indentures which cannot be modified or amended without the consent of the holder of each outstanding Debt Security affected.

        Each of the Indentures provides that the holders of a majority in principal amount of the outstanding Debt Securities of each series may direct the time, method and place of conducting proceedings for remedies available to the Trustee or exercising any trust or power conferred on the Trustee in respect of that series, except for such directions that are in conflict with statute, rule of law or the Indenture, any other action by Trustee deemed proper by the Trustee not inconsistent with such direction and any action the Trustee determines might involve it in personal liability or would be unjustly prejudicial to the holders of Debt Securities of such series not consenting to such direction. Otherwise, a holder of Debt Securities of a series may not pursue any remedy with respect to the Indentures or any Debt Securities of that series unless:

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the holder of Debt Securities of that series gives the Trustee written notice of a continuing event of default;



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the holders of at least 25% in aggregate principal amount of the Debt Securities of that series then outstanding make a written request to the Trustee to pursue the remedy;



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the holder or holders of Debt Securities of that series offer the Trustee reasonable indemnity against any costs, liability or expense incurred in connection therewith;



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the Trustee does not comply with the request within 60 days after receipt of the notice, request and the offer of indemnity; and



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during such 60-day period, the holders of a majority in aggregate principal amount of the Debt Securities of that series then outstanding do not give the Trustee a direction that is inconsistent with the request.

        However, these limitations do not apply to the right of any holder of any Debt Securities to receive payment of the principal of, premium, if any, and interest on the Debt Securities of a series or to bring suit for the enforcement of any such payment on or after the due date expressed in the Debt Securities, which right shall not be impaired or affected without the consent of the holder.

        We will be required to furnish to the Trustee annually a statement as to our performance and observance of and compliance with certain of our obligations under each Indenture and written notice of any default or event of default within five (5) days after we become aware of any such default or event of default.

        Under each Indenture, the Trustee must give to the holders of each series of Debt Securities notice of all uncured defaults with respect to such series within 90 days after the occurrence of such a default known to the Trustee; provided that, except in the case of default in the payment of principal or interest on any of the Debt Securities, or in the payment of any sinking or purchase fund installment, the Trustee shall be protected in withholding such notice if the trustee committee of directors and/or responsible officers of the Trustee in good faith determines that the withholding of such notice is in the interests of the holders of the Debt Securities of such series. No notice of default

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with respect to the payment of any sinking or purchase fund will be given until at least 30 days after the occurrence thereof.

Modification of the Indentures

        Each Indenture contains provisions permitting us and the Trustee, with the consent of the holders of not less than 66²/3% in aggregate principal amount of all series of the Debt Securities to be affected at the time outstanding under the applicable Indenture (voting as one class), to enter into indentures supplemental to or modifying the applicable Indenture or the rights of the holders of such Debt Securities, except that no such modification shall (a) extend the fixed maturity, reduce the principal amount or premium (if any) or reduce the rate or extend the time of payment of interest on any Debt Security without the consent of the holder of each Debt Security so affected; or (b) reduce the percentage in principal amount of the outstanding Debt Securities, the consent of whose holders is required for any such modification, without the consent of the holders of all Debt Securities then outstanding.

        Without the consent of any holders of Debt Securities, we and the Trustee may enter into one or more supplemental indentures (which shall conform to the effective provisions of the Trust Indenture Act) for any of the following purposes:

•

to evidence the succession of another corporation to us, or successive successions and the assumption by the successor corporation of our covenants, agreements and obligations;



•

to add to our covenants further covenants, restrictions, conditions or provisions for the protection of the holders of the Debt Securities, and to make the occurrence, or the occurrence and continuance, of a default in any of such additions, an event of default permitting the enforcement of all remedies provided in the applicable Indenture, with such period of grace, if any, and subject to such conditions as such supplemental indenture may provide;



•

to provide for the issuance under the applicable Indenture of Debt Securities, whether or not then outstanding, in coupon form (including Debt Securities registrable as to principal only) and to provide for exchangeability of such Debt Securities with Debt Securities issued under such Indenture in fully registered form;



•

to modify, eliminate or add to the provisions of the applicable Indenture to such extent as shall be necessary to effect the qualification of such Indenture under the Trust Indenture Act, or under any similar federal statute hereafter enacted, and to add to such Indenture such other provisions as may be expressly permitted by the Trust Indenture Act, excluding, however, the provisions referred to in Section 316(a)(2) of the Trust Indenture Act or any corresponding provision in any similar federal statute hereafter enacted;



•

to convey, transfer, assign, mortgage or pledge any property to or with the Trustee;



•

to evidence and provide for the acceptance and appointment hereunder of a successor trustee with respect to the Debt Securities of one or more series and to add or change any provisions of the applicable Indenture as shall be necessary to provide for or facilitate the administration of the trusts by more than one trustee;



•

to change or eliminate any provision of the applicable Indenture or to add any new provision to the Indenture; provided that if such change, elimination or addition will adversely affect the interests of the holders of the Debt Securities of any series in any material respect, such change, elimination or addition will become effective with respect to such series only when there is no Debt Security of such series remaining outstanding under the Indenture;



•

to provide collateral security for the Debt Securities;

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•

to change any place where (1) the principal, premium (if any) and interest on Debt Securities of any series shall be payable; (2) any Debt Securities of any series may be surrendered for registration of transfer; (3) Debt Securities of any series may be surrendered for exchange; and (4) notices and demands to or upon us in respect of the Debt Securities of any series and the applicable Indenture may be served; and



•

to establish the form or terms of Debt Securities of any series as permitted by the Indenture.

        The Trustee is authorized by the Indentures to join with us in the execution of any such supplemental indenture, to make any further appropriate agreements and stipulations which may be contained in any such supplemental indenture and to accept the conveyance, transfer, assignment, mortgage or pledge of any property under such supplemental indenture. The Trustee shall not be obligated to enter into any such supplemental indenture which adversely affects the Trustee's own rights, duties or immunities under the Indentures or otherwise. No supplemental indenture shall be effective as against the Trustee unless and until it has been duly executed and delivered by the Trustee.

Senior Debt Securities

        The senior Debt Securities will be unsecured senior obligations and will rank equally with all other senior unsecured and unsubordinated debt. The senior Debt Securities will, however, be subordinated in right of payment to all of our secured indebtedness to the extent of the value of the assets securing that indebtedness. Except as provided in the Senior Indenture or specified in any authorizing resolution or supplemental indenture relating to a series of senior Debt Securities to be issued, no Senior Indenture will limit the amount of additional indebtedness that may rank equally with the senior Debt Securities or the amount of indebtedness, secured or otherwise, that may be incurred or preferred stock that may be issued by any of our subsidiaries. Any such limitations will also be described in the applicable prospectus supplement.

Subordination Provisions for Subordinated Debt Securities

        Any subordinated Debt Securities issued under the Subordinated Indenture will be subordinate and subject in right of payment to the prior payment in full of all of our Senior Indebtedness. The following provisions will apply to the subordinated Debt Securities unless otherwise specified in the applicable prospectus supplement:

        Subject to any collateral, security, assurance or guarantee provided for the benefit of any series of subordinated Debt Securities, if any, the payment of principal, any premium and interest on the subordinated Debt Securities will be subordinated in right of payment to the prior payment in full of all of our Senior Indebtedness. This means that in certain circumstances where we may not be making payments on all of our debt obligations as they become due, the holders of all of our Senior Indebtedness will be entitled to receive payment in full of all amounts that are due or will become due on the Senior Indebtedness before the holders of subordinated Debt Securities will be entitled to receive any payment or distribution (other than in the form of subordinated securities) on the subordinated Debt Securities. These circumstances include the following circumstances:

•

we make a payment or distribute assets to creditors upon any liquidation, dissolution, winding up or reorganization of our company, or as part of an assignment or marshalling of our assets for the benefit of our creditors;



•

we file for bankruptcy or certain other events in bankruptcy, insolvency or similar proceedings occur; and



•

the maturity of the subordinated debt securities is accelerated. For example, the entire principal amount of a series of subordinated debt securities may be declared to be due and immediately

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payable or may be automatically accelerated due to an event of default as described under "—Default and Rights of Acceleration."

        In addition, we are generally not permitted to make payments of principal, any premium or interest on the subordinated Debt Securities if we default on our obligation to make payments on our Senior Indebtedness and do not cure such default. We are also prohibited from making payments on subordinated Debt Securities if an event of default (other than a payment default) that permits the holders of Senior Indebtedness to accelerate the maturity of the Senior Indebtedness occurs and we and the Trustee have received a notice of such event of default. However, unless the Senior Indebtedness has been accelerated because of that event of default, this payment blockage cannot last more than the number of days specified in the Subordinated Indenture or in any supplemental indenture under which subordinated Debt Securities are issued.

        These subordination provisions mean that if we are insolvent a holder of Senior Indebtedness is likely to ultimately receive out of our assets more than a holder of the same amount of our subordinated Debt Securities, and a creditor of ours that is owed a specific amount but who owns neither our Senior Indebtedness nor our subordinated Debt Securities may ultimately receive less than a holder of the same amount of Senior Indebtedness and more than a holder of subordinated Debt Securities.

        The Subordinated Indenture does not limit the amount of Senior Indebtedness we are permitted to have and we may in the future incur additional senior indebtedness.

        "Senior Indebtedness" is defined in the Subordinated Indenture to mean, with respect to us,

•

the principal, premium, if any, and interest (including interest, whether or not allowable, accruing after the filing of a petition initiating any proceeding under any state, federal or foreign bankruptcy law) in respect of (A) our indebtedness and obligations related thereto and (B) indebtedness evidenced by securities, debentures, notes, bonds or other similar instruments issued by us;



•

all our capital lease, purchase money and similar obligations;



•

all our obligations issued or assumed as the deferred purchase price of property, all our conditional sale obligations and all our obligations under any title retention agreement;



•

all our obligations for the reimbursement of any letter of credit, any banker's acceptance, any security purchase facility, any repurchase agreement or similar arrangement, any commercial paper, any interest rate swap, any other hedging arrangement or any obligation under options or any similar credit or other transaction;



•

all obligations for indemnification, contributions, earnouts, adjustments of purchase price or similar obligations;



•

all obligations in respect of workers compensation claims, self-insurance, indemnities, bid performance, warranty release, appeal, surety and similar bonds;



•

all obligations of the type referred to in clauses (i) through (vi) above of other Persons for the payment of which we are responsible or liable as obligor, guarantor or otherwise;



•

all obligations of the type referred to in clauses (i) through (vii) above of other Persons secured by any lien on any property or asset of ours (whether or not such obligation is assumed by us); and



•

all renewals, extensions, modifications and refunding of obligations of the type referred to in clauses (i) through (viii) above;

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whether incurred on or prior to the date of the Subordinated Indenture or thereafter incurred. Notwithstanding the foregoing, "Senior Indebtedness" shall not include (1) any indebtedness of the Company owed to any of its subsidiaries, (2) Debt Securities issued pursuant to the Subordinated Indenture and guarantees in respect of such Debt Securities, (3) our trade accounts payable arising in the ordinary course of business (such trade accounts payable being pari passu in right of payment to Debt Securities issued pursuant to the Subordinated Indenture) or (4) obligations with respect to which in the instrument creating or evidencing the same or pursuant to which the same is outstanding, it is provided that such obligations are pari passu or junior in right of payment to Debt Securities issued pursuant to the Subordinated Indenture. Senior Indebtedness shall continue to be Senior Indebtedness and be entitled to the subordination provisions irrespective of any amendment, modification or waiver of any term of such Senior Indebtedness.

        If this prospectus is being delivered in connection with a series of subordinated securities, the applicable prospectus supplement or the information incorporated by reference will set forth the approximate amount of Senior Indebtedness outstanding as of a recent date.

Collection of Indebtedness

        The Indentures also provide that if we fail to make payment of principal, premium (if any), interest or any mandatory sinking fund requirements on the Debt Securities (and in the case of payment of interest or any mandatory sinking fund payment, such failure to pay shall have continued for 30 days) we will, upon demand of the Trustee, pay to it, for the benefit of the holders of the Debt Securities, the whole amount then due and payable on the Debt Securities for principal or premium (if any) and interest, with interest on the overdue principal and, to the extent payment of interest shall be legally enforceable, upon overdue installments of interest at the rate borne by the Debt Securities and such further amounts to cover the costs and expenses of collection. The Indentures further provide that if we fail to pay such amount forthwith upon such demand, the Trustee may, among other things, institute a judicial proceeding for the collection thereof.

Satisfaction and Discharge

        We may satisfy and discharge our obligations under either Indenture if, at any time, (1) we have delivered to the Trustee for cancellation all Debt Securities of any series authenticated or (2) all Debt Securities of such series not previously delivered to the Trustee for cancellation shall have become due and payable, or are by their terms to become due and payable within one year or are to be called for redemption within one year under arrangements satisfactory to the Trustee for the giving of notice of redemption, and we deposit or cause to be deposited with the Trustee as trust funds (a) an amount of money which will be sufficient or (b) government obligations, the principal and interest on which when due, without any regard to reinvestment thereof, will provide monies which will be sufficient or (c) a combination of (a) and (b) which will be sufficient, to pay at maturity or upon redemption all Debt Securities of such series not theretofore delivered to the Trustee for cancellation, including principal, premium (if any) and interest due or to become due to such date of maturity or date fixed for redemption, as the case may be.

        If we satisfy and discharge our obligations under either Indenture and we pay or cause to be paid all other sums payable by us under the applicable Indenture with respect to such series, then the applicable Indenture will cease to be of further effect with respect to the Debt Securities of such series, and the Trustee, on demand of and at our cost and expense, shall execute instruments acknowledging satisfaction of and discharging the applicable Indenture with respect to the Debt Securities of such series. We agree to reimburse the Trustee for any costs or expenses thereafter reasonably and properly incurred by the Trustee in connection with the applicable Indenture or the Debt Securities of such series.

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        In addition, we will be discharged from any and all obligations in respect of the Debt Securities of any series (except in each case of certain obligations) if (i) we deposit with the Trustee, in trust, money, government obligations, or a combination thereof, in an amount sufficient to pay all the principal (including any mandatory sinking fund payments) of, and interest on, Debt Securities of such series on the dates such payments are due in accordance with the terms of such Debt Securities, (ii) we deliver to the Trustee an opinion of counsel to the effect that the deposit and related discharge would not cause the holders of the Debt Securities of such series to recognize income, gain or loss for federal income tax purposes, or a copy of a ruling or other formal statement or action to such effect received from or published by the United States Internal Revenue Service and (iii) satisfy certain other requirements under the applicable Indenture.

No Personal Liability of Incorporators, Stockholders, Officers, Directors or Employees

        No recourse under or upon any of our obligations, covenants or agreements in the Indentures or a supplemental indenture or in any Debt Securities issued under the Indentures or because of the creation of any indebtedness represented thereby, shall be had against any of our incorporators or any of our (or any successor corporation's) past, present or future stockholders, officers or directors. Each holder, by accepting notes issued under the Indenture, waives and releases all such liability. The waiver and release are part of the consideration for the issuance of the Debt Securities. This waiver may not be effective to waive liabilities under the federal securities laws.

Reports to Holders and SEC Reports

        We will file with the Trustee or post to the SEC's Electronic Data-Gathering, Analysis and Retrieval system ("EDGAR") the information, documents and other reports required to be filed with the SEC pursuant to Section 13 or 15(d) of the Exchange Act within 15 days after the information, documents or reports are required to be filed with the SEC. In addition, we will also file with the Trustee (or post to EDGAR) and file with the SEC such additional information, documents and reports with respect to our compliance with the conditions and covenants provided for in the Indentures as may be required from time to time by the rules and regulations prescribed by the SEC. We will also transmit to all holders of each series of Debt Securities such summaries of any information, documents and reports required to be filed by us with respect to each such series pursuant to the Indentures as may be required from time to time by the rules and regulations prescribed by the SEC within 30 days after filing thereof with the Trustee or posting thereof to EDGAR.

Notices

        Any notice or demand required or permitted to be given or served by the Trustee or by the holders of Debt Securities to or on us may be given or served by postage prepaid first class mail or overnight courier addressed (until another address is filed by us with the Trustee) as follows: Piedmont Natural Gas Company, Inc., 550 South Tryon Street, Charlotte, North Carolina 28202, Attention: Corporate Secretary.

        Any notice, direction, request or demand by any holder of the Debt Securities or by the Company to or upon the Trustee shall be deemed to have been sufficiently given or made, if given or made in writing as follows: 10161 Centurion Parkway N., Jacksonville, Florida 32256, Attention: Corporate Trust Administration.

        Notices to holders of certificated Debt Securities will be mailed to them at their registered addresses. Any notice or communication mailed to a registered holder shall be mailed to the holder at the holder's address as it appears on the Debt Security register maintained by of the Debt Security registrar and shall be sufficiently given if so mailed within the time prescribed. Notices to holders of book-entry Debt Securities will be given to the depositary in accordance with its applicable procedures.

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Title

        We, the Trustee and any of our agents may deem the person in whose name such Debt Security shall be registered upon our books (which, in the case of Debt Securities represented by a global security, shall be the Depositary or its nominee) to be the absolute owner of such Debt Security (whether or not such Debt Security shall be overdue and notwithstanding any notation of ownership or other writing thereon), for the purpose of receiving payment and for all other purposes.

Governing Law

        The Indentures, are and the Debt Securities will be, governed by, and construed in accordance with, the laws of the State of New York.

Concerning the Trustee

        The Trustee will be under no obligation to expend or risk its own funds or to incur any personal financial liability in the performance of its duties under the Indentures, or in the exercise of any of its rights or powers under the Indentures, if there are reasonable grounds for believing that repayment of such funds or adequate indemnity against such risk or liability is not reasonably assured to it.

        The Bank of New York Mellon Trust Company, N.A. is the Trustee under the Indentures. We may from time to time enter into commercial banking relationships with affiliates of the Trustee. Notice to the Trustee should be directed to:

The Bank of New York Mellon Trust Company, N.A.
10161 Centurion Parkway N.
Jacksonville, Florida 32256
Attention: Corporate Trust Administration

GLOBAL SECURITIES

        Piedmont Natural Gas Company may issue the Debt Securities as book-entry securities. Any such book-entry securities will be represented by one or more fully registered global securities. Piedmont Natural Gas Company will register each global security with or on behalf of a securities depositary identified in the applicable prospectus supplement. Each global security will be deposited with the securities depositary or its nominee or a custodian for the securities depositary.

        As long as the securities depositary or its nominee is the registered holder of a global security representing securities described in this prospectus, that person will be considered the sole owner and holder of the global security and the securities it represents for all purposes. Except in limited circumstances, owners of beneficial interests in a global security:

•

may not have the global security or any securities it represents registered in their names;



•

may not receive or be entitled to receive physical delivery of certificated securities in exchange for the global security; and



•

will not be considered the owners or holders of the global security or any securities it represents for any purposes under the applicable securities or the related mortgage or indenture.

        Piedmont Natural Gas Company will make all payments of principal and any premium and interest on a global security to the securities depositary or its nominee as the holder of the global security. The laws of some jurisdictions require that certain purchasers of securities take physical delivery of securities in definitive form. These laws may impair the ability to transfer beneficial interests in a global security.

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        Ownership of beneficial interests in a global security will be limited to institutions having accounts with the securities depositary or its nominee, which are called "participants" in this discussion, and to persons that hold beneficial interests through participants. When a global security representing securities described in this prospectus is issued, the securities depositary will credit on its book entry, registration and transfer system the principal amounts of securities the global security represents to the accounts of its participants. Ownership of beneficial interests in a global security will be shown only on, and the transfer of those ownership interests will be effected only through, records maintained by:

•

the securities depositary, with respect to participants' interests; and



•

any participant, with respect to interests the participant holds on behalf of other persons.

        Payments participants make to owners of beneficial interests held through those participants will be the responsibility of those participants. The securities depositary may from time to time adopt various policies and procedures governing payments, transfers, exchanges and other matters relating to beneficial interests in a global security. None of the following will have any responsibility or liability for any aspect of the securities depositary's or any participant's records relating to beneficial interests in a global security representing securities described in this prospectus, for payments made on account of those beneficial interests or for maintaining, supervising or reviewing any records relating to those beneficial interests:

•

Piedmont Natural Gas Company;



•

the applicable trustee; or



•

an agent of either of them.