Code Q&A
Nov 27, 2006 4:32 PM, By Mike Holt
Q. What are the limitations on the use of rigid nonmetallic conduit in an underground application serving a gasoline dispenser?
A. Rigid nonmetallic conduit can be installed underground below a Class I location if the raceway is covered with not less than 2 feet of earth, concrete, or asphalt [514.8, Exception 2]. However, threaded rigid metal or threaded intermediate metal conduit must be used for the last 2 feet of the underground run.
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