Metal or plastic boxes can be used with nonmetallic conduit. Always run a ground wire when using PVC conduit.Click to see full answer. In this regard, can you mix PVC and metal conduit?With a primer, PVC conduit (or metal for that matter) can be painted to match the house or foundation appropriately. When joining metal and PVC conduit, use a male threaded fitting on the PVC and threaded female coupling on the steel. I prefer to thread plastic into metal to prevent cracks in the plastic.Furthermore, are metal junction boxes safe? Ultra-strong, fireproof, and incapable of being melted, metal boxes offer the greatest level of security for all electrical wiring applications. For do-it-yourselfers, metal electrical boxes can be somewhat more difficult to work with, since they often have rear and side knock-outs that require supplementary clamps. Subsequently, one may also ask, should I use metal or plastic electrical boxes? The advantage of plastic boxes is comparatively minor even for non-metallic sheathed cable — you can avoid making one ground connection and they sometimes cost a little less. On the other hand, plastic boxes are more vulnerable to impacts. For exposed or shop wiring, metal boxes are probably better.What kind of wire do you use for outdoor conduit?Type UF cable is the most commonly used nonmetallic cable for residential outdoor wiring runs. UF cable can be direct-buried (without conduit) with a minimum of 24 inches of earth cover.
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