CONSENT OF J.H. COHN LLP

Published on November 15, 1999



EXHIBIT 23.10

CONSENT OF INDEPENDENT PUBLIC ACCOUNTANTS

As independent public accountants, we hereby consent to the incorporation by
reference in this registration statement of Quanta Services, Inc., of our report
dated April 9, 1999, except for Note 5 as to which the date is October 1, 1999,
on the financial statements of the Telecommunications Division of Conti
Enterprises, Inc. as of and for the year ended December 31, 1998 included in
Quanta Services, Inc.'s Form 8-K dated on or about November 15, 1999 and to all
references to our Firm included in this registration statement.

/s/ J.H. Cohn LLP
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J.H. COHN LLP

Roseland, New Jersey
November 15, 1999