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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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    Are BARE COPPER CPCs still allowed ? I suspect not but am not aware of what regulation prohibits them.

    It would seem to me that a BARE CPC pulled into conduit would be preferable since long runs would be earthed throughout by fortuitous contact. Joints could then be made with PTFE tape to ensure water resistance in exposed locations.

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    Are BARE COPPER CPCs still allowed ? I suspect not but am not aware of what regulation prohibits them.

    It would seem to me that a BARE CPC pulled into conduit would be preferable since long runs would be earthed throughout by fortuitous contact. Joints could then be made with PTFE tape to ensure water resistance in exposed locations.

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