Exhibit 1.2


                         ARIZONA PUBLIC SERVICE COMPANY

                                   Securities


                             UNDERWRITING AGREEMENT
                             ----------------------


                                                           ---------------------



Dear Sir or Madam:

         1. Introduction. Arizona Public Service Company, an Arizona corporation
(the "Company"), proposes to issue and sell from time to time up to $400,000,000
in  aggregate  principal  amount  of its  unsecured  debentures,  notes or other
evidences of indebtedness (the  "Securities")  registered under the registration
statements  referred to in Section 2(a). The Securities will be issued under the
Indenture,  dated as of January  15,  1998,  between  the  Company and The Chase
Manhattan Bank, as Trustee,  (the  "Indenture"),  as amended and supplemented by
one or more Supplemental Indentures between the Company and the Trustee (each, a
"Supplemental  Indenture")  (the Indenture as amended and  supplemented  by such
Supplemental   Indentures  being  sometimes   hereinafter  referred  to  as  the
"Indenture").  The Securities will be issued in one or more series, which series
may  vary as to  interest  rates,  maturities,  redemption  provisions,  selling
prices,  and other terms,  with all such terms for any  particular  issue of the
Securities  being  determined  at the time of  sale.  Particular  issues  of the
Securities  may be sold  from  time to time to one or more of the  firms to whom
this Agreement is addressed,  and to such other  purchasers as the Company shall
designate and as shall agree in writing to comply with the terms and  conditions
of this  Agreement,  for  resale  in  accordance  with  the  terms  of  offering
determined at the time of sale. The Securities involved in any such offering are
hereinafter referred to as the "Purchased Securities," the party or parties that
agree to purchase the same are hereinafter  referred to as the "Underwriters" of
such Purchased  Securities,  and the  representative or  representatives  of the
Underwriters,  if any,  specified in a Terms Agreement  referred to in Section 3
are hereinafter referred to as the "Representatives."

         2.  Representations  and Warranties of the Company.  In connection with
each offering of the Purchased  Securities,  the Company represents and warrants
to, and agrees with, the Underwriters that:

                  (a) A  registration  statement  (No.  333-27551)  relating  to
         $50,000,000 of the Securities,  the Company's first mortgage bonds (the
         "Bonds"),  or the  Company's  senior notes (the  "Senior  Notes") and a
         registration  statement (No.  333-____) relating to $350,000,000 of the
         Securities,  the  Bonds  or the  Senior  Notes  (including  a  combined
         prospectus  relating to up to $400,000,000 of the Securities,  Bonds or
         Senior Notes) were filed with the  Securities  and Exchange  Commission
         (the  "Commission")  and  have  become  effective.   Such  registration
         statements,  as each is  amended  at the  time of the  Terms  Agreement
         referred  to in Section 3 relating  to the  Purchased  Securities,  are
         hereinafter  referred to as the "First Registration  Statement" and the
         "Second Registration Statement,"  respectively,  and, together with any
         related  462(b)  registration   statement  or  amendment  thereto,  are
         hereinafter  referred to collectively as the "Registration  Statements"
         and such  prospectus,  as  supplemented as contemplated by Section 3 to
         reflect  the terms of the  Purchased  Securities  and terms of offering
         thereof,  including all material  incorporated by reference therein, is
         hereinafter referred to as the "Prospectus."

                  (b) Each part of the Registration  Statements  relating to the
         Securities, when such part became effective,  conformed in all material
         respects to the requirements of the Securities Act of 1933 (the "Act"),
         the Trust  Indenture  Act of 1939 (the "Trust  Indenture  Act") and the
         rules and regulations  (the "Rules and  Regulations") of the Commission
         and did not include any untrue  statement of a material fact or omit to
         state any material fact  required to be stated  therein or necessary to
         make the  statements  therein not  misleading,  and on the date of each
         Prospectus  Supplement  referred  to in  Section  3,  the  Registration
         Statements and the Prospectus will conform in all material  respects to
         the  requirements of the Act, the Trust Indenture Act and the Rules and
         Regulations,  and at such date none of such  documents will include any
         untrue  statement of a material fact or omit to state any material fact
         required  to be stated  therein  or  necessary  to make the  statements
         therein not misleading;  provided, however, that the foregoing does not
         apply to (a) statements in or omissions  from any such documents  based
         upon written  information  furnished to the Company by any  Underwriter
         specifically  for use  therein  or (b)  that  part of the  Registration
         Statements   that  consists  of  the  Statement  of   Eligibility   and
         Qualification  (Form T-1) under the Trust  Indenture Act of 1939 of The
         Chase Manhattan Bank, as Trustee under the Indenture.

                  (c) An order of the Arizona Corporation  Commission shall have
         been granted authorizing the execution and delivery of the Supplemental
         Indenture  relating to the  Purchased  Securities  and the issuance and
         sale of the Purchased Securities on the terms and conditions herein and
         in the  Prospectus  and the Terms  Agreement  referred  to in Section 3
         relating to the Purchased Securities, and the approval or
                                       2

         consent  of no other  public  body or  authority  is  necessary  to the
         execution and delivery of such  Supplemental  Indenture or the validity
         of the issuance and sale of the Purchased Securities,  except as may be
         required under state securities or blue sky laws.

                  (d) The Company holds such valid  franchises,  certificates of
         convenience and necessity,  licenses, and permits as are necessary with
         respect to the  maintenance  and operation of its property and business
         as now  conducted,  except that (A) the Company from time to time makes
         minor  extensions of its system prior to the time a related  franchise,
         certificate,  license,  or  permit is  procured,  (B) from time to time
         communities already being served by the Company become incorporated and
         considerable  time may  elapse  before a  franchise  is  procured,  (C)
         certain franchises may have expired prior to the renegotiation thereof,
         (D) the  Company may not have  obtained  certain  permits or  variances
         relating to the environmental requirements described in any of its Form
         10-K  Report,  its Form  10-Q  Reports,  and/or  its  Form 8-K  Reports
         incorporated by reference in the Registration  Statements,  (E) certain
         minor defects and exceptions may exist which,  individually  and in the
         aggregate,  are not deemed material,  and (F) the Company does not make
         any  representation  regarding the geographical scope of any franchise,
         certificate,  license,  or  permit  that  is  not  specific  as to  its
         geographical scope.

         3.  Purchase  and  Offering.  The  obligation  of the  Underwriters  to
purchase,  and the obligation of the Company to sell,  the Purchased  Securities
will be  evidenced  by an exchange of facsimile  transmission  or other  written
communications  (the "Terms  Agreement")  at the time the Company  determines to
sell  the  Purchased   Securities.   The  Terms   Agreement  shall  specify  (by
incorporation  by  reference  or  otherwise)  the party or parties  that will be
Underwriters,  the principal  amount to be purchased by each, the purchase price
to be paid by the  Underwriters,  any  compensation or commissions to be paid to
Underwriters,  the offering price, and the terms of the Purchased Securities not
already  specified in the  Indenture,  including,  but not limited to,  interest
rates, maturity,  redemption provisions, and sinking fund requirements,  if any.
The Terms  Agreement  shall also  specify  (by  incorporation  by  reference  or
otherwise) the time and date of delivery and payment (the "Closing  Date"),  the
place of delivery  and  payment,  and any details of the terms of offering  that
should be reflected in the prospectus supplement relating to the offering of the
Purchased  Securities (the "Prospectus  Supplement").  It is understood that the
Underwriters  will offer the Purchased  Securities  for sale as set forth in the
Prospectus.  The  obligations  of the  Underwriters  to purchase  the  Purchased
Securities shall be several and not joint.  Except as may otherwise be set forth
in the Terms Agreement,  the Purchased Securities will be in definitive form and
in such  denominations  and  registered  in such names as the  Underwriters  may
request.
                                       3

         4.  Covenants  of the  Company.  In  connection  with each  offering of
Purchased  Securities,  the  Company  covenants  and  agrees  with  the  several
Underwriters that:

                  (a)  The  Company   will  advise  the   Underwriters   or  the
         Representatives  promptly of any proposed  amendment or supplementation
         of the First Registration Statement, the Second Registration Statement,
         or the Prospectus. The Company will also advise the Underwriters or the
         Representatives  of the institution by the Commission of any stop order
         proceedings in respect of the First Registration Statement,  the Second
         Registration  Statement,  or of any part thereof, and will use its best
         efforts to prevent the issuance of any such stop order and to obtain as
         soon as possible its lifting, if issued.

                  (b)  If,  at  any  time  when  a  prospectus  relating  to the
         Purchased  Securities  is required to be  delivered  under the Act, any
         event  occurs as a result of which the  Prospectus  as then  amended or
         supplemented  would include an untrue  statement of a material fact, or
         omit to state  any  material  fact  necessary  to make  the  statements
         therein,  in the light of the circumstances under which they were made,
         not  misleading,  or if  it is  necessary  at  any  time  to  amend  or
         supplement the First Registration  Statement,  the Second  Registration
         Statement,  or the  Prospectus  to  comply  with the Act,  the  Company
         promptly  will  prepare and file with the  Commission  an  amendment or
         supplement that will correct such statement or omission or an amendment
         that will effect such compliance.

                  (c) As soon as  practicable,  but not  later  than 18  months,
         after  the  date  of the  Terms  Agreement  relating  to the  Purchased
         Securities,  the Company will make generally  available to its security
         holders an earning  statement or statements (which need not be audited)
         covering a period of at least 12 months  beginning  after the effective
         date of the Second  Registration  Statement  (as defined in Rule 158(c)
         under the Act),  which will satisfy the  provisions of Section 11(a) of
         the Act and the rules and regulations thereunder.

                  (d)  The  Company  will  furnish  to the  Underwriters  or the
         Representatives such copies of the Registration  Statements  (including
         one copy of the Second Registration  Statement for each Representative,
         or for each  Underwriter if there are no  Representatives,  and for the
         counsel  for  the  Underwriters,  which  is  signed  and  includes  all
         exhibits),  any  related  preliminary  prospectus  supplements  and the
         Prospectus,  including all amendments or supplements to such documents,
         as may be reasonably requested.

                  (e) The Company will arrange or cooperate in arrangements  for
         the  qualification  of  the  Purchased  Securities  for  sale  and  the
         determination of their eligibility for
                                       4

         investment under the laws of such  jurisdictions as the Underwriters or
         the Representatives  designate and will continue such qualifications in
         effect  so  long as  required  for the  distribution  of the  Purchased
         Securities,  provided that the Company shall not be required to qualify
         as a foreign corporation in any State, to consent to service of process
         in any State  other  than with  respect  to claims  arising  out of the
         offering  or  sale  of  the  Purchased  Securities,  or to  meet  other
         requirements deemed by it to be unduly burdensome.

                  (f)  During  the  period of five  years  after the date of the
         Terms Agreement relating to the Purchased Securities,  the Company will
         furnish to the  Underwriters or the  Representatives  thereunder,  and,
         upon  request,  each  of  the  other  Underwriters,   (i)  as  soon  as
         practicable  after the end of each  fiscal  year,  a balance  sheet and
         statements of income and retained earnings of the Company as at the end
         of and for  such  year,  all in  reasonable  detail  and  certified  by
         independent  public  accountants,  and (ii) (A) as soon as  practicable
         after the end of each  quarterly  fiscal  period  (except  for the last
         quarterly  fiscal  period of each  fiscal  year),  a balance  sheet and
         statement  of  income  of the  Company  as at the end of and  for  such
         period, all in reasonable detail and certified by a principal financial
         or accounting officer of the Company, (B) as soon as available,  a copy
         of each report of the Company mailed by the Company to  stockholders or
         filed  with the  Commission,  and (C) from  time to  time,  such  other
         information  concerning the Company as may reasonably be requested.  So
         long as the Company has active subsidiaries,  such financial statements
         will be on a  consolidated  basis to the  extent  the  accounts  of the
         Company and its subsidiaries are consolidated.

                  (g)  The  Company  will  pay  all  expenses  incident  to  the
         performance of its obligations under this Agreement, and will reimburse
         the Underwriters for any reasonable expenses (including reasonable fees
         and  disbursements of counsel)  incurred by them in connection with the
         qualification  of the  Purchased  Securities  with respect to which the
         Terms Agreement  relating to the Purchased  Securities has been entered
         for sale, and the  determination  of their  eligibility for investment,
         under  the laws of such  jurisdictions  as the  Representatives  or, if
         there  are no  Representatives,  the  Underwriters  designate,  and the
         printing of  memoranda  relating  thereto,  and for any fees charged by
         investment rating agencies for the rating of the Purchased Securities.

                  (h) The  Company  will  not  offer  or sell  any  other of its
         Securities for a period beginning at the time of execution of the Terms
         Agreement  relating  to the  Purchased  Securities  and  ending  on the
         Closing Date relating  thereto without prior consent of the Underwriter
         or the Representatives.
                                       5

         5. Conditions of the Obligations of the  Underwriters.  The obligations
of the  Underwriters  to purchase and pay for the Purchased  Securities  will be
subject to the accuracy of the representations and warranties on the part of the
Company  herein,  to the accuracy of the  statements  of Company  officers  made
pursuant to the  provisions  hereof,  to the  performance  by the Company of its
obligations hereunder, and to the following additional conditions precedent:

                  (a)  The  Underwriters  or  the  Representatives   shall  have
         received a letter  from  DELOITTE & TOUCHE  LLP,  dated the date of the
         Terms Agreement,  confirming that they are independent certified public
         accountants within the meaning of the Act and the applicable  published
         Rules and  Regulations  thereunder,  and  stating in effect that (i) in
         their  opinion the  financial  statements  and schedules of the Company
         audited  by them and  incorporated  by  reference  in the  Registration
         Statements  comply  as to  form  in  all  material  respects  with  the
         applicable  accounting  requirements of the Securities  Exchange Act of
         1934  (the  "1934  Act")  and  the  published   Rules  and  Regulations
         thereunder  and (ii) on the basis of a reading of the latest  available
         interim financial statements of the Company,  inquiries of officials of
         the Company responsible for financial and accounting matters, and other
         specified procedures,  nothing came to their attention that caused them
         to believe that (A) the unaudited financial statements  incorporated by
         reference,  if any, in the Registration  Statements do not comply as to
         form  in  all  material   respects  with  the   applicable   accounting
         requirements  of the 1934 Act and the published  Rules and  Regulations
         thereunder or are not stated on a basis  substantially  consistent with
         that of the audited financial  statements  incorporated by reference in
         the  Registration  Statements,  (B) at the  date  of  the  most  recent
         available  unaudited  financial  statements and at a specified date not
         more than five days prior to the date of this Agreement,  there was any
         increase in the amounts of common stock, redeemable preferred stock, or
         non-redeemable   preferred  stock  of  the  Company  or  any  increase,
         exceeding $10,000,000, in long-term debt of the Company or, at the date
         of the most recent available unaudited  financial  statements there was
         any decrease in net assets as compared  with amounts  shown in the most
         recent   financial   statements   incorporated   by  reference  in  the
         Registration  Statements,  or (C) for the twelve-month  period ended at
         the date of the most recent available  unaudited  financial  statements
         there  were  any   decreases,   exceeding  3%,  as  compared  with  the
         twelve-month  period  ended at the date of the  most  recent  financial
         statements incorporated by reference in the Registration Statements, in
         the amounts of total  revenues  or net income,  except in all cases for
         increases or decreases  which result from the declaration or payment of
         dividends, or which the Registration Statements (including any material
         incorporated by reference therein) disclose have occurred or may occur,
         or which are described in such letter.
                                       6


                  (b) No stop order  suspending the  effectiveness  of the First
         Registration Statement,  the Second Registration Statement, or any part
         thereof  shall have been  issued and no  proceedings  for that  purpose
         shall have been  instituted  or, to the knowledge of the Company or the
         Underwriters, shall be contemplated by the Commission.

                  (c)  Subsequent  to  the  execution  of  the  Terms  Agreement
         relating to the Purchased Securities, (i) there shall not have occurred
         any change,  or any development  involving a prospective  change, in or
         affecting particularly the business or properties of the Company or its
         subsidiaries  which,  in the  judgment of a majority in interest of the
         Underwriters under such Terms Agreement, including any Representatives,
         materially impairs the investment quality of the Purchased  Securities,
         (ii) there shall not have occurred a suspension or material  limitation
         in  trading in  securities  generally  on the New York Stock  Exchange,
         (iii) there shall not have occurred a general  moratorium on commercial
         banking  activities in New York declared by either  Federal or New York
         State  authorities,  (iv)  no  rating  of  any of  the  Company's  debt
         securities  shall have been lowered and there shall have been no public
         announcement  that  any  such  debt  securities  have  been  placed  on
         CreditWatch, Watchlist, or under any similar surveillance or review, in
         each case with negative implications,  by any recognized rating agency,
         and (v) there shall not have  occurred  any outbreak or  escalation  of
         major  hostilities  in  which  the  United  States  is  involved,   any
         declaration  of war by  Congress or any other  substantial  national or
         international  calamity or emergency  if, in the judgment of a majority
         in interest of the Underwriters  under such Terms Agreement,  including
         any  Representatives,  the  effect  of any such  outbreak,  escalation,
         declaration,  calamity or emergency makes it impractical or inadvisable
         to proceed with completion of the sale of and payment for the Purchased
         Securities.

                  (d)  The  Underwriters  or  the  Representatives   shall  have
         received an opinion of Snell & Wilmer L.L.P.,  counsel for the Company,
         dated the relevant Closing Date, to the effect that:

                           (i) The  Company  is a  corporation  duly  organized,
                  validly  existing,  and in good standing under the laws of the
                  State of Arizona and has full corporate power and authority to
                  carry on its business as presently conducted;  and the Company
                  is duly qualified as a foreign  corporation to do business and
                  is in good  standing in the States of New Mexico,  California,
                  Oregon,  Washington,  Montana  and  Wyoming,  the  only  other
                  jurisdictions   in  which  it  owns  or   leases   substantial
                  properties  or in which the conduct of its  business  requires
                  such qualification; 
                                       7

                           (ii)  The   Purchased   Securities   have  been  duly
                  authorized,  executed,  authenticated,  issued, and delivered,
                  constitute  valid  and  legally  binding  obligations  of  the
                  Company  entitled to the  benefits  provided by the  Indenture
                  (except as the same may be limited by (a)  general  principles
                  of  equity  or  by  bankruptcy,  insolvency,   reorganization,
                  arrangement, moratorium, or other laws or equitable principles
                  relating to or affecting the enforcement of creditors'  rights
                  generally  and (b) the  qualification  that  certain  waivers,
                  procedures,  remedies,  and other  provisions of the Purchased
                  Securities  and the  Indenture may be  unenforceable  under or
                  limited by the law of the State of Arizona;  however, such law
                  does not in such counsel's opinion  substantially  prevent the
                  practical   realization  of  the  benefits  intended  by  such
                  documents)  and  conform  to the  description  thereof  in the
                  Prospectus;

                           (iii)  The  Indenture   has  been  duly   authorized,
                  executed,  and delivered,  has been duly  qualified  under the
                  Trust  Indenture  Act,  and  constitutes  a valid and  binding
                  instrument  enforceable in accordance with its terms except as
                  the same may be limited by (a) general principles of equity or
                  by  bankruptcy,   insolvency,   reorganization,   arrangement,
                  moratorium,  or other laws or equitable principles relating to
                  or affecting the  enforcement of creditors'  rights  generally
                  and (b) the  qualification  that certain waivers,  procedures,
                  remedies, and other provisions of the Purchased Securities and
                  the Indenture may be unenforceable under or limited by the law
                  of the State of  Arizona;  however,  such law does not in such
                  counsel's   opinion   substantially   prevent  the   practical
                  realization of the benefits intended by such documents;

                           (iv)  With  certain  exceptions,   a  public  service
                  corporation is required to obtain  certificates of convenience
                  and necessity from the Arizona  Corporation  Commission  under
                  A.R.S.  Section 40-281.A for construction of its lines, plant,
                  services,  or systems, or any extensions  thereof,  within the
                  State of Arizona, and to obtain franchises or similar consents
                  or permits from counties and incorporated municipalities under
                  A.R.S. Section 40-283.A for the construction,  operation,  and
                  maintenance of transmission lines within the State of Arizona;
                  to the best of such counsel's knowledge after due inquiry, the
                  Company   holds  such  valid   franchises,   certificates   of
                  convenience and necessity, consents, and permits
                                       8

                  pursuant to such  statutory  provisions as are necessary  with
                  respect to the  maintenance  and operation of its property and
                  business as now  conducted,  except that (A) the Company  from
                  time to time makes minor extensions of its system prior to the
                  time a related franchise,  certificate,  license, or permit is
                  procured,  (B) from  time to time  communities  already  being
                  served by the Company  become  incorporated  and  considerable
                  time may elapse  before a franchise is  procured,  (C) certain
                  franchises  may  have  expired  prior  to  the   renegotiation
                  thereof,  (D) certain minor defects and  exceptions  may exist
                  which,  individually  and in the  aggregate,  are  not  deemed
                  material, and (E) such counsel need not be required to express
                  any opinion regarding the geographical scope of any franchise,
                  certificate, license, or permit that is not specific as to its
                  geographical scope;

                           (v) The issuance and sale of the Purchased Securities
                  on the terms and conditions set forth or  contemplated  herein
                  and in the Prospectus and the Terms Agreement  relating to the
                  Purchased  Securities  and the  execution  and delivery of the
                  Supplemental  Indenture  relating to the Purchased  Securities
                  have  been  duly   authorized   by  the  Arizona   Corporation
                  Commission,  said Commission had jurisdiction in the premises,
                  and no  further  approval,  authorization,  or  consent of any
                  other  public  board or body is  necessary  to the validity of
                  such  issuance and sale of such  Purchased  Securities  or the
                  execution and delivery of such Supplemental Indenture,  except
                  as may be required under state securities or blue sky laws, as
                  to which laws such counsel shall not be required to express an
                  opinion;

                           (vi) The First Registration  Statement and the Second
                  Registration  Statement have become  effective  under the Act,
                  and, to the best of the  knowledge  of such  counsel,  no stop
                  order suspending the  effectiveness of the First  Registration
                  Statement or the Second Registration Statement has been issued
                  and no  proceedings  for that purpose have been  instituted or
                  are pending or  contemplated  under the Act,  and each part of
                  the Registration  Statements relating to the Securities,  when
                  such part became effective, and the Prospectus, as of the date
                  of the Prospectus Supplement, and each amendment or supplement
                  thereto,  as of their  respective  effective  or issue  dates,
                  complied  as  to  form  in  all  material  respects  with  the
                  requirements  of the Act,  the Trust  Indenture  Act,  and the
                  published Rules and Regulations; such counsel has
                                       9

                  no  reason  to  believe  that  any  part  of the  Registration
                  Statements,   when  such  part   became   effective,   or  the
                  Prospectus, as of the date of the Prospectus Supplement, or as
                  of the Closing Date,  or any amendment or supplement  thereto,
                  as of their respective  effective or issue dates, or as of the
                  Closing  Date,  contained  any untrue  statement of a material
                  fact or  omitted to state any  material  fact  required  to be
                  stated therein or necessary to make the statements therein not
                  misleading;  the descriptions in the  Registration  Statements
                  and Prospectus of statutes, legal and governmental proceedings
                  and  contracts,  and other  documents  are accurate and fairly
                  present  the  information  required  to be  shown;  and to the
                  actual   knowledge  of  those  persons  in  the  lawyer  group
                  described in such opinion,  there are no legal or governmental
                  proceedings  required to be described in the  Prospectus  that
                  are not described as required,  nor any contracts or documents
                  of a character  required to be described  in the  Registration
                  Statements  or  Prospectus  or to be filed as  exhibits to the
                  Registration  Statements  that are not  described and filed as
                  required (it being  understood  that such counsel need express
                  no opinion as to the financial  statements or other  financial
                  data   contained  in  the   Registration   Statements  or  the
                  Prospectus); and

                           (vii) This  Agreement  and the Terms  Agreement  have
                  been duly authorized, executed, and delivered by the Company.

                  In giving such  opinion,  (a) Snell & Wilmer  L.L.P.  may rely
         solely upon  certificates of the Company as to any factual matters upon
         which any such  opinions  are based  and may rely upon the  opinion  of
         Keleher & McLeod,  P.A.,  referred to below, as to all matters governed
         by the laws of the  State of New  Mexico,  but the  opinion  of Snell &
         Wilmer L.L.P.  shall state that, though they are members of the Arizona
         Bar and do not hold  themselves out as experts on the laws of the State
         of New Mexico, they have made a study of the laws of such State insofar
         as such laws are involved in the  conclusions  stated in their opinion,
         and from such study it is their  opinion  that such laws  support  such
         conclusions and that, in their opinion,  the  Underwriters and they are
         justified  to such  extent in  relying  upon the  opinion  of Keleher &
         McLeod, P.A.; and (b) the lawyer group referred to in such opinion will
         mean those lawyers in the offices of Snell & Wilmer L.L.P. who (i) have
         billed any time on the  particular  transaction  to which such  opinion
         relates or (ii) have billed  more than ten hours to any Company  matter
         in the twelve-month period preceding the date on which the list of such
         lawyers was compiled for purposes of inquiry pursuant to such opinion.
                                       10

                  (e)  The  Underwriters  or  the  Representatives   shall  have
         received an opinion of Keleher & McLeod,  P.A.,  New Mexico counsel for
         the Company, dated the Closing Date, to the effect that:

                           (i)  The  Company  is  duly  qualified  as a  foreign
                  corporation  to do  business  and is in good  standing  in the
                  State of New Mexico and has full corporate power and authority
                  to  engage  in the State of New  Mexico  in the  business  now
                  conducted by it therein; and

                           (ii) The  activities  of the  Company in the State of
                  New Mexico to date do not constitute it a "public  utility" as
                  that term is defined in the relevant  laws of the State of New
                  Mexico,  and  accordingly,  no public  utility  franchises  or
                  certificates  of convenience and necessity are necessary under
                  New Mexico law with respect to the  maintenance  and operation
                  of the Company's property and business as now conducted in the
                  State of New Mexico and no approval, authorization, or consent
                  of the New  Mexico  Public  Utility  Commission  or any  other
                  public  board or body of the State of New  Mexico is  required
                  for the issuance and sale of the  Purchased  Securities on the
                  terms and conditions herein and in the Prospectus set forth or
                  contemplated   or  for  the  execution  of  the   Supplemental
                  Indenture relating to the Purchased Securities,  except as may
                  be  required  under New Mexico  state  securities  or blue sky
                  laws,  as to which laws such counsel  shall not be required to
                  express an opinion.

         In giving such  opinion,  Keleher & McLeod,  P.A.  may rely solely upon
         certificates  of the Company as to any factual  matters  upon which any
         such opinions are based.

                  (f)  The  Underwriters  or  the  Representatives   shall  have
         received  from counsel for the  Underwriters  such opinion or opinions,
         dated the  Closing  Date,  with  respect  to the  incorporation  of the
         Company,  the validity of the Purchased  Securities,  the  Registration
         Statements, the Prospectus, and other related matters as may reasonably
         be required,  and the Company shall have furnished to such counsel such
         documents as they request for the purpose of enabling them to pass upon
         such matters.  In rendering  such opinion,  such counsel may rely as to
         the  incorporation of the Company and all other matters governed by the
         laws of the States of Arizona and New Mexico upon the opinions of Snell
         & Wilmer L.L.P. and Keleher & McLeod, P.A., referred to above.

                  (g)  The  Underwriters  or  the  Representatives   shall  have
         received a certificate of the President or any Vice President
                                       11

         and a principal  financial or accounting officer of the Company,  dated
         the  Closing  Date,  in  which  such  officers,  to the  best of  their
         knowledge  after  reasonable   investigation,   shall  state  that  the
         representations  and  warranties  of the Company in this  Agreement are
         true and correct, that the Company has complied with all agreements and
         satisfied all conditions on its part to be performed or satisfied at or
         prior  to  the  Closing  Date,  that  no  stop  order   suspending  the
         effectiveness  of  the  First  Registration  Statement  or  the  Second
         Registration  Statement  has been  issued and no  proceedings  for that
         purpose have been instituted or are contemplated by the Commission, and
         that, subsequent to the date of the most recent financial statements in
         the  Prospectus,  there  has been no  material  adverse  change  in the
         financial  position  or results of  operations  of the  Company and its
         subsidiaries  except as set forth or  contemplated in the Prospectus or
         as described in such certificate.

                  (h)  The  Underwriters  or  the  Representatives   shall  have
         received a letter of  DELOITTE & TOUCHE LLP,  dated the  Closing  Date,
         which meets the requirements of subsection (a) of this Section,  except
         that the specified date referred to in such  subsection  will be a date
         not more than five days prior to the Closing  Date for the  purposes of
         this subsection.

         The Company will furnish the Underwriters or the  Representatives  with
such conformed copies of such opinions, certificates,  letters, and documents as
may be reasonably requested.

         6. Indemnification.

                  (a)  The  Company  will   indemnify  and  hold  harmless  each
         Underwriter  and each person,  if any, who  controls  such  Underwriter
         within the meaning of the Act against  any losses,  claims,  damages or
         liabilities,  joint or  several,  to  which  such  Underwriter  or such
         controlling  person may  become  subject,  under the Act or  otherwise,
         insofar as such losses, claims,  damages, or liabilities (or actions in
         respect thereof) arise out of or are based upon any untrue statement or
         alleged untrue  statement of any material fact contained in any part of
         the Registration Statements relating to the Securities,  when such part
         became effective,  any preliminary prospectus or preliminary prospectus
         supplement,  the Prospectus, or any amendment or supplement thereto, or
         arise out of or are based  upon the  omission  or alleged  omission  to
         state  therein  a  material  fact  required  to be  stated  therein  or
         necessary  to make the  statements  therein  not  misleading;  and will
         reimburse each  Underwriter  and each such  controlling  person for any
         legal or other expenses reasonably incurred by such Underwriter or such
         controlling  person in connection with  investigating  or defending any
         such loss, claim, damage, liability, or action; provided, however, that
         the Company  will not be liable in any such case to the extent that any
         such
                                       12

         loss,  claim,  damage,  or liability  arises out of or is based upon an
         untrue  statement  or alleged  untrue  statement or omission or alleged
         omission  made  in  any of  such  documents  in  reliance  upon  and in
         conformity  with  written  information  furnished to the Company by any
         Underwriter specifically for use therein. This indemnity agreement will
         be in addition to any liability which the Company may otherwise have.

                  (b)  Each  Underwriter  will  severally   indemnify  and  hold
         harmless the Company,  each of its directors,  each of its officers who
         have signed the Registration  Statements,  and each person, if any, who
         controls the Company within the meaning of the Act, against any losses,
         claims,  damages,  or  liabilities  to which  the  Company  or any such
         director,  officer, or controlling person may become subject, under the
         Act  or  otherwise,   insofar  as  such  losses,  claims,  damages,  or
         liabilities  (or actions in respect  thereof) arise out of or are based
         upon any untrue  statement or alleged untrue  statement of any material
         fact contained in any part of the Registration  Statements  relating to
         the  Securities,  when  such part  became  effective,  any  preliminary
         prospectus or preliminary prospectus supplement, the Prospectus, or any
         amendment or supplement  thereto, or arise out of or are based upon the
         omission  or the  alleged  omission  to state  therein a material  fact
         required  to be stated  therein  or  necessary  to make the  statements
         therein not  misleading,  in each case to the  extent,  but only to the
         extent,  that such untrue  statement  or alleged  untrue  statement  or
         omission  or  alleged  omission  was  made  in  reliance  upon  and  in
         conformity  with written  information  furnished to the Company by such
         Underwriter  specifically for use therein; and will reimburse any legal
         or  other  expenses  reasonably  incurred  by the  Company  or any such
         director,   officer,   or   controlling   person  in  connection   with
         investigating or defending any such loss, claim, damage,  liability, or
         action.  This indemnity  agreement will be in addition to any liability
         which such Underwriter may otherwise have.

                  (c) Promptly after receipt by an indemnified  party under this
         Section of notice of the  commencement of any action,  such indemnified
         party  will,  if a claim in respect  thereof is to be made  against the
         indemnifying party under this Section, notify the indemnifying party of
         the   commencement   thereof;   but  the  omission  so  to  notify  the
         indemnifying  party will not relieve it from any liability  that it may
         have to any  indemnified  party  otherwise than under this Section.  In
         case any such action is brought against any indemnified  party,  and it
         notifies  the  indemnifying  party  of the  commencement  thereof,  the
         indemnifying party will be entitled to participate  therein and, to the
         extent  that it may wish,  jointly  with any other  indemnifying  party
         similarly  notified,  to  assume  the  defense  thereof,  with  counsel
         satisfactory  to such  indemnified  party (who shall not,  without  the
         consent of the indemnified party, be counsel to the
                                       13

         indemnifying  party),  and after notice from the indemnifying  party to
         such  indemnified  party  of its  election  so to  assume  the  defense
         thereof,  the indemnifying party will not be liable to such indemnified
         party under this Section for any legal or other  expenses  subsequently
         incurred  by such  indemnified  party in  connection  with the  defense
         thereof other than reasonable costs of  investigation.  An indemnifying
         party  shall  not be  liable  for any  settlement  of a claim or action
         effected without its written  consent,  which shall not be unreasonably
         withheld.

                  (d) If the  indemnification  provided  for in this  Section is
         unavailable or insufficient  to hold harmless an indemnified  party for
         any loss, claim, damage,  liability,  or action described in subsection
         (a) or (b) above, then each indemnifying  party shall contribute to the
         amount  paid or  payable by such  indemnified  party as a result of the
         losses, claims, damages or liabilities referred to in subsection (a) or
         (b) above on the  following  basis:  (1) if such loss,  claim,  damage,
         liability,  or action arises under  subsection  (a) above,  then (i) in
         such  proportion  as is  appropriate  to reflect the relative  benefits
         received  by the  Company on the one hand and the  Underwriters  on the
         other from the  offering of the  Securities  or (ii) if the  allocation
         provided by clause (i) above is not  permitted  by  applicable  law, in
         such  proportion  as is  appropriate  to reflect not only the  relative
         benefits referred to in clause (i) above but also the relative fault of
         the  Company  on the one  hand  and the  Underwriters  on the  other in
         connection  with the  statements  or omissions  which  resulted in such
         losses,  claims,  damages or  liabilities as well as any other relevant
         equitable  considerations;   and  (2)  if  such  loss,  claim,  damage,
         liability,  or action arises under  subsection (b) above,  then in such
         proportion  as is  appropriate  to reflect  the  relative  fault of the
         Company on the one hand and the  Underwriter on the other in connection
         with the statements or omissions which resulted in such losses, claims,
         damages  or  liabilities  as  well  as  any  other  relevant  equitable
         considerations.  For the  purposes  of clause (1) above,  the  relative
         benefits  received by the Company on the one hand and the  Underwriters
         on the other shall be deemed to be in the same  proportion as the total
         net proceeds from the offering (before deducting  expenses) received by
         the Company bear to the total  underwriting  discounts and  commissions
         received by the  Underwriters.  For the purposes of clauses (1) and (2)
         above,  the relative  fault shall be  determined by reference to, among
         other  things,  whether  the untrue or alleged  untrue  statement  of a
         material  fact or the omission or alleged  omission to state a material
         fact relates to information supplied by the Company or the Underwriters
         and the parties' relative intent, knowledge,  access to information and
         opportunity  to correct or prevent  such untrue  statement or omission.
         The  amount  paid by an  indemnified  party as a result of the  losses,
         claims,  damages or  liabilities  referred to in the first  sentence of
         this
                                       14

         subsection  (d) shall be deemed to include any legal or other  expenses
         reasonably  incurred  by such  indemnified  party  in  connection  with
         investigating  or defending any action or claim which is the subject of
         this subsection  (d). No person guilty of fraudulent  misrepresentation
         (within the  meaning of Section  11(f) of the Act) shall be entitled to
         contribution  from any  person  who was not  guilty of such  fraudulent
         misrepresentation. The Underwriters' obligations in this subsection (d)
         to  contribute   are  several  in   proportion   to  their   respective
         underwriting obligations and not joint.

         7. Default of Underwriters.  If any Underwriter or Underwriters default
in their obligations to purchase Purchased Securities pursuant to this Agreement
and the Terms  Agreement and the principal  amount of Purchased  Securities that
such defaulting Underwriter or Underwriters agreed but failed to purchase is ten
percent (10%) or less of the principal  amount of Purchased  Securities to which
such Terms Agreement relates,  the Underwriters or the  Representatives may make
arrangements  satisfactory  to the  Company for the  purchase of such  Purchased
Securities by other persons,  including any of the Underwriters,  but if no such
arrangements are made by the Closing Date the nondefaulting  Underwriters  shall
be obligated severally,  in proportion to their respective commitments hereunder
and under such Terms Agreement,  to purchase the Purchased  Securities that such
defaulting  Underwriter or  Underwriters  agreed but failed to purchase.  If any
Underwriter or  Underwriters  so default and the aggregate  principal  amount of
Purchased  Securities  with respect to which such  default or defaults  occur is
more  than the  above-described  amount  and  arrangements  satisfactory  to the
remaining  Underwriters  and the  Company  for the  purchase  of such  Purchased
Securities  by other  persons  are not made within  thirty-six  hours after such
default, the Terms Agreement will terminate without liability on the part of any
non-defaulting  Underwriter or the Company,  except as provided in Section 8. As
used in this Agreement,  the term "Underwriter"  includes any person substituted
for an Underwriter under this Section.  Nothing herein will relieve a defaulting
Underwriter from liability for its default.

         8. Survival of Certain Representations and Obligations.  The respective
indemnities,  agreements,  representations,  warranties, and other statements of
the  Company  or its  officers  and of the  Underwriters  set  forth  in or made
pursuant to this  Agreement  will remain in full force and effect  regardless of
any investigation,  or statement as to the results thereof, made by or on behalf
of the  Underwriters  or the Company or any of its  officers or directors or any
controlling  person,  and will survive delivery of and payment for the Purchased
Securities.  If any Terms  Agreement is terminated  pursuant to Section 7, or if
for any reason a purchase  pursuant to any Terms  Agreement is not  consummated,
the Company shall remain  responsible  for the expenses to be paid or reimbursed
by it pursuant to Section 4 and the  respective  obligations  of the Company and
the Underwriters pursuant to Section 6 shall remain in effect.
                                       15

         9. Notices.  All  communications  hereunder relating to any offering of
Purchased Securities will be in writing,  and, if sent to the Underwriters,  may
be mailed,  delivered,  or telecopied and confirmed to the Representative  first
named in the  Terms  Agreement  relating  to such  Purchased  Securities  or the
Underwriters  at their  addresses  furnished  to the  Company in writing for the
purpose of communications;  provided, however, that any notice to an Underwriter
pursuant to Section 6 will be mailed,  delivered, or telecopied and confirmed to
each such Underwriter at its own address.  All  communications  hereunder to the
Company shall be mailed to the Company, Attention: Treasurer, at P.O. Box 53999,
Phoenix,  Arizona 85O72-3999,  or delivered,  or telecopied and confirmed to the
Company at 400 North Fifth Street, Phoenix, Arizona 85004.

         10.  Successors.  This  Agreement  will inure to the  benefit of and be
binding upon the parties hereto and the Underwriter or Underwriters as are named
in any Terms  Agreement  and their  respective  successors  and the officers and
directors and controlling  persons referred to in Section 6, and no other person
will have any right or obligation hereunder.

         11.  Representation of Underwriters.  The Representatives,  if any, may
act for the  Underwriters  in  connection  with  any  offering  to which a Terms
Agreement  may  relate,  and any  action  under  this  Agreement  or such  Terms
Agreement taken by the Representatives jointly or the Representative first named
in such Terms  Agreement in such capacity will be binding upon the  Underwriters
of Purchased Securities to which such Terms Agreement relates.

         12.  Execution in  Counterpart.  This Agreement and any Terms Agreement
may be executed in one or more counterparts, each of which shall be deemed to be
an original,  but all such respective  counterparts shall together  constitute a
single instrument.
                                       16

         If the  foregoing  is in  accordance  with  your  understanding  of our
agreement, kindly sign and return to us the enclosed duplicate hereof, whereupon
it will become a binding  agreement  between the Company and the Underwriters in
accordance with its terms.


                                                  Very truly yours,

                                                  ARIZONA PUBLIC SERVICE COMPANY



                                                  By____________________________
                                                    Treasurer



The foregoing Underwriting Agreement
is hereby confirmed and accepted as
of the date first above written.



By__________________________________
                                       17