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Electrical: making rainproof conduit connections
Hello,
I'm somewhat familiar with the use of different electrical metal conduits (e.g. RMC and EMT), but I'm wondering what additional procedures are required when making up connections outdoors. A few questions: 1) For an overhead connection to a box (enclosure), a hub is typically held onto the top of the box by 4 screws. Is the mating of the two metal surfaces raintight, or is an additional washer or silicone needed between the two surfaces? 2) For a threaded RMC connection, is any silicone or other thread sealant required? 3) When making an RMC connection to a knockout at the bottom of a box (enclosure), is the use of two locknuts sufficient, or is a different termination fitting required? Thanks, Wayne |
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