Exhibit 24

LIMITED POWER OF ATTORNEY
FOR SECTION 16 REPORTING OBLIGATIONS
	Know all by these presents, that the undersigned hereby constitutes and
appoints each of Carolyn M.
Campbell, Brett A. Schrader, Joshua S. Chaffin, and Matthew D. McCoy signing
singly, the undersigned's true
and lawful attorney in fact to:
	(1)	execute for and on behalf of the undersigned, in the undersigned's capacity
as a director and/or
officer of Quanta Services, Inc. (the "Company"), Forms 3, 4, and 5 in
accordance with Section 16(a) of the
Securities Exchange Act of 1934, as amended, and the rules thereunder;
	(2)	do and perform any and all acts for and on behalf of the undersigned which
may be necessary or
desirable to complete and execute any such Form 3, 4, or 5, complete and execute
any amendment or
amendments thereto, and timely file such form with the United States Securities
and Exchange Commission and
any stock exchange or similar authority; and
	(3)	take any other action of any type whatsoever in connection with the
foregoing which, in the
opinion of such attorney in fact, may be of benefit to, in the best interest of,
or legally required by, the
undersigned, it being understood that the documents executed by such attorney in
fact on behalf of the
undersigned pursuant to this Limited Power of Attorney shall be in such form and
shall contain such terms and
conditions as such attorney in fact may approve in such attorney in fact's
discretion.
	The undersigned hereby grants to each such attorney in fact full power and
authority to do and perform
any and every act and thing whatsoever requisite, necessary, or proper to be
done in the exercise of any of the
rights and powers herein granted, as fully to all intents and purposes as the
undersigned might or could do if
personally present, with full power of substitution or revocation, hereby
ratifying and confirming all that such
attorney in fact, or such attorney in fact's substitute or substitutes, shall
lawfully do or cause to be done by
virtue of this power of attorney and the rights and powers herein granted.  The
undersigned acknowledges that
the foregoing attorneys in fact, in serving in such capacity at the request of
the undersigned, are not assuming,
nor is the Company assuming, any of the undersigned's responsibilities to comply
with Section 16 of the
Securities Exchange Act of 1934, as amended.
	This Limited Power of Attorney shall remain in full force and effect until the
undersigned is no longer
required to file Forms 3, 4, and 5 with respect to the undersigned's holdings of
and transactions in securities
issued by the Company, unless earlier revoked by the undersigned in a signed
writing delivered to the foregoing
attorneys in fact.  The undersigned acknowledges that the execution of this
Limited Power of Attorney shall
automatically revoke all earlier power(s) of attorney executed by the
undersigned in the undersigned's capacity
as a director and/or officer of the Company and in connection with the
undersigned's obligations under
Section 16 of the Securities Exchange Act of 1934, as amended.
	IN WITNESS WHEREOF, the undersigned has caused this Limited Power of Attorney
to be executed
as of this 22nd day of September, 2014.


		/s/ Steven J. Kemps