You must support exposed vertical risers for industrial machinery or fixed equipment at intervals not exceeding _____ ft, when the IMC or RMC conduit is made up with threaded couplings, firmly ...
When installing polyvinyl chloride conduit (PVC) or reinforced thermosetting resin conduit (RTRC) as a Class I, Division 1 wiring method for an underground installation in a tank farm area, which ...
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