Hint: PVC problems on the pier
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I spotted this broken PVC conduit at a pier in South Carolina. The cable inside the conduit is UF cable, so at least it is permitted by Sec. 555.13(A)(1) to be used in a wet location. Section 340.10(3) recognizes that UF is permitted in wet locations. PVC conduit is also allowed in wet locations per Sec. 352.10(D). However, PVC conduit installed exposed in areas where subject to physical damage must be of a type identified for that use. Schedule 80 PVC conduit should have been used at this location to help avoid the type of damage we can see in the photo. For marinas, boatyards and docking facilities, Sec. 555.13(B)(5) similarly requires PVC conduit “suitable for the location” to be installed to protect the wiring above the decks of piers. Section 110.12(B) prohibits damaged parts that may affect safe operation or mechanical strength of the equipment. I think it’s obvious from the photo that the safe operation and mechanical strength of this installation has been severely compromised.