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Outside Steel Conduit Joints.

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We must maintain mechanical and electrical continuity of steel conduit, so can't use P.T.F.E tape or Loctite 55 at screwed joints to keep them watertight. Has anyone ever had water ingress at screwed conduit joints outside? 543.3.6.

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    If in doubt, use something like Galvazinc after degreasing thoroughly. You are going to need it for running couplings in any event. Good electrical continuity will be maintained by the flanks of the threads coming together once screwed tight. It's not like a water or gas pipe where the contents are under pressure - there is nothing forcing the rain in. It might even be that surface tension helps too.

    543.3.6 says nothing about being water-tight.

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    If in doubt, use something like Galvazinc after degreasing thoroughly. You are going to need it for running couplings in any event. Good electrical continuity will be maintained by the flanks of the threads coming together once screwed tight. It's not like a water or gas pipe where the contents are under pressure - there is nothing forcing the rain in. It might even be that surface tension helps too.

    543.3.6 says nothing about being water-tight.

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