AGREEMENT AND PLAN OF EXCHANGE

     This AGREEMENT AND PLAN OF EXCHANGE (this  "Agreement"),  dated as of March
1, 2001, is between NUI CORPORATION,  a New Jersey  corporation (the "Company"),
the company  whose shares will be acquired  pursuant to the  Exchange  described
herein,  and NUI Holding Company,  a New Jersey corporation ("NUI Holding Co."),
the acquiring company.  The Company and NUI Holding Co. are hereinafter referred
to, collectively, as the "Companies."

                                   WITNESSETH:

     WHEREAS,  the  authorized  capital  stock of the  Company  consists  of (a)
30,000,000  shares of Common Stock,  without par value ("Company Common Stock"),
of which 13,122,429 shares are issued and outstanding,  and (b) 5,000,000 shares
of Preferred  Stock,  par value, of which no shares are issued and  outstanding;
the number of shares of Company  Common  Stock being  subject to increase to the
extent that shares reserved for issuance are issued prior to the Effective Time,
as hereinafter defined;

     WHEREAS,  NUI Holding Co. is a wholly owned  subsidiary of the Company with
authorized  capital stock  consisting of (a) 30 million  shares of Common Stock,
without par value  ("NUI  Holding Co.  Common  Stock"),  of which 100 shares are
issued  and  outstanding  and owned of record by the  Company  and (b) 5 million
shares of  Preferred  Stock,  without  par value  ("NUI  Holding  Co.  Preferred
Stock"), of which no shares are issued and outstanding;

     WHEREAS,  the  Boards of  Directors  of the  respective  Companies  deem it
desirable and in the best interests of the Companies and the shareholders of the
Company that each share of Company  Common Stock be exchanged for a share of NUI
Holding Co. Common Stock with the result that NUI Holding Co.  becomes the owner
of all  outstanding  Company Common Stock and that each holder of Company Common
Stock  becomes the owner of an equal number of shares of NUI Holding Co.  Common
Stock, all on the terms and conditions hereinafter set forth; and

     WHEREAS,  the Boards of Directors of the  Companies  have each approved and
adopted this Agreement and the Board of Directors of the Company has recommended
that its shareholders approve this Agreement pursuant to the New Jersey Business
Corporation Act (the "Act") and the shareholders have approved this Agreement;

     WHEREAS,   the  parties  hereto  agree  that  at  the  Effective  Time  (as
hereinafter  defined) each share of Company Common Stock issued and  outstanding
immediately  prior to the Effective  Time will be exchanged for one share of NUI
Holding Co. Common Stock (the "Exchange");

     WHEREAS,  for U.S.  federal  income tax  purposes,  it is intended that the
Exchange will constitute a transaction  described in section 351 of the Internal
Revenue Code of 1986, as amended (the "Code);

     NOW,  THEREFORE,  in consideration of the premises,  and of the agreements,
covenants and  conditions  hereafter  contained in this  Agreement,  the parties
agree as follows:

                                    ARTICLE I

     This Agreement was approved by the  shareholders of the Company entitled to
vote with respect thereto for approval as provided by the Act.

                                   ARTICLE II

     Subject to the  satisfaction  of the terms and conditions set forth in this
Agreement  and to the  provisions  of Article VI, NUI Holding Co. agrees to file
with the  Secretary  of State of the  State of New  Jersey  (the  "Secretary  of
State") a Certificate of Share Exchange (the  "Certificate") with respect to the
Exchange,  and the  Exchange  shall  take  effect  upon  the  effective  date as
specified in the Certificate (the "Effective Time").

                                   ARTICLE III

     A. At the Effective Time:

     (1) each share of Company Common Stock issued and  outstanding  immediately
prior to the Effective  Time shall be  automatically  exchanged for one share of
NUI Holding Co.  Common  Stock,  which shares shall  thereupon be fully paid and
non-assessable;

     (2) NUI Holding Co.  shall  acquire and become the owner and holder of each
issued and outstanding share of Company Common Stock so exchanged;

     (3) each share of NUI  Holding  Co.  Common  Stock  issued and  outstanding
immediately  prior to the Effective  Time shall be canceled and shall  thereupon
constitute an authorized and unissued share of NUI Holding Co. Common Stock;

     (4)  each  share  of  Company   Common  Stock  held  under  NUI's  Dividend
Reinvestment  and Common Stock Purchase Plan, 1988 Stock Plan, 1996 Stock Option
and Stock Award Plan,  1996 Employee Stock Purchase Plan and 1996 Director Stock
Purchase Plan (including fractional and uncertificated shares) immediately prior
to the  Effective  Time shall be  automatically  exchanged  for a like number of
shares  (including  fractional  and  uncertificated  shares) of NUI  Holding Co.
Common Stock,  which shares shall be held under NUI's Dividend  Reinvestment and
Common Stock Purchase Plan,  1988 Stock Plan,  1996 Stock Option and Stock Award
Plan,  1996 Employee  Stock Purchase Plan and 1996 Director Stock Purchase Plan,
as the case may be; and

     (5) the former  owners of Company  Common  Stock shall be entitled  only to
receive shares of NUI Holding Co. Common Stock as provided herein.

     B. As of the Effective  Time, NUI Holding Co. shall succeed to the Dividend
Reinvestment  and Common Stock Purchase Plan as in effect  immediately  prior to
the Effective Time, and the Dividend  Reinvestment and Stock Purchase Plan shall
be appropriately amended to provide for the issuance and delivery of NUI Holding
Co. Common Stock on and after the Effective Time.

     C. As of the  Effective  Time,  the 1988 Stock Plan,  1996 Stock Option and
Stock Award Plan,  1996 Employee  Stock  Purchase  Plan and 1996 Director  Stock
Purchase  Plan shall be  appropriately  amended to provide for the  issuance and
delivery of NUI Holding Co. Common Stock on and after the Effective Time.

                                   ARTICLE IV

         The  filing  of the  Certificate  with the  Secretary  of State and the
consummation  of the Exchange are subject to the  satisfaction  of the following
conditions precedent:

     (1) the approval for listing,  upon official notice of issuance, by the New
York Stock  Exchange,  of NUI Holding Co. Common Stock to be issued and reserved
for issuance pursuant to the Exchange;

     (2) the receipt of such orders,  authorizations,  approvals or waivers from
the New Jersey Board of Public Utilities, the Florida Public Service Commission,
the North Carolina Utilities Commission, the Maryland Public Service Commission,
the  New  York  Public  Service  Commission,  the  Pennsylvania  Public  Utility
Commission and all other regulatory  bodies,  boards or agencies as are required
in connection  with the Exchange,  which  orders,  authorizations,  approvals or
waivers remain in full force and effect and do not include, in the sole judgment
of the Board of Directors of the Company, unacceptable conditions; and

     (3) the receipt by the Company of a tax opinion of LeBoeuf,  Lamb, Greene &
MacRae L.L.P.  ("LeBoeuf") satisfactory to the Board of Directors of the Company
to the effect that the Exchange  will be treated as a  transaction  described in
Section 351 of the Code. In rendering such opinion, LeBoeuf shall be entitled to
rely upon  customary  assumptions  and  representations  of the  Company and NUI
Holding  Company  that  are in form and  substance  reasonably  satisfactory  to
LeBoeuf.

                                    ARTICLE V

     Following  the  Effective  Time,  each   outstanding   certificate   which,
immediately prior to the Effective Time,  represented Company Common Stock shall
be deemed and treated for all  corporate  purposes to represent the ownership of
the same  number of shares of NUI  Holding  Co.  Common  Stock.  The  holders of
Company  Common  Stock at the  Effective  Time shall have no right to have their
shares of Company  Common Stock  transferred  on the stock transfer books of the
Company,  and such stock  transfer  books  shall be deemed to be closed for this
purpose at the Effective Time.

                                   ARTICLE VI

     This Agreement may be amended, modified or supplemented, or compliance with
any  provision or  condition  hereof may be waived,  at any time,  by the mutual
consent  of the Boards of  Directors  of the  Company  and of NUI  Holding  Co.;
provided,  however, that no such amendment,  modification,  supplement or waiver
shall be made or effected, if such amendment, modification, supplement or waiver
would, in the judgment of the Board of Directors of the Company,  materially and
adversely affect the shareholders of the Company.

     Notwithstanding  shareholder approval of this Agreement, this Agreement may
be terminated  and the Exchange and related  transactions  abandoned at any time
prior to the time the  Certificate is filed with the Secretary of State,  if the
Board of  Directors  of the Company  determines,  in its sole  discretion,  that
consummation  of the Exchange  would be inadvisable or not in the best interests
of the Company or its shareholders.





     IN WITNESS  WHEREOF,  each of the Company and NUI Holding Co.,  pursuant to
authorization  and  approval  given by its Board of  Directors,  has caused this
Agreement to be executed as of the date first above written.

                                             NUI CORPORATION




                                             By: /s/ John Kean, Jr.
                                                ____________________________
                                             Name:    John Kean, Jr.
                                             Title:   President



                                             NUI HOLDING COMPANY



                                             By: /s/ John Kean, Jr.
                                                ____________________________
                                             Name:    John Kean, Jr.
                                             Title:   President