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3M™ 7900 Series
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3M™ Warning Tape 7900 Series
Wisconsin SPECIFICATIONS & Guidelines
Wisconsin State Legislature
Public Service Commission
Service lines: plastic addition [49 CFR 192.375]
"Plastic service lines that are not encased shall either be installed with an electrically conductive wire having adequate corrosion resistant characteristics or protection or some other acceptable means of readily locating the buried service pipe from the ground surface shall be provided."
Wisconsin Department of Transportation
WisDOT ITS Design & Operations Guide, October 2009
Trenched Conduit Design Guidelines
"... Underground warning tape should be laid above all underground conduits, 12 inches below grade.
A copper wire (10 or 12-awg typ.) should be installed in one of the conduits between access points. The locate wire is to be electrically connected between conduit runs to allow for continuous locate signal transmission throughout the conduit network. ..."
Call Before You Dig
Diggers Hotline, Inc.
811 or 800-242-8511
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