We have put miles of cross-linked solid dielectric bare concentric neutral in the earth with some in PVC conduit. We have had a lot of failures with the cable in the conduit. We quit using the bare concentric neutral and went to a polyethylene jacket over the concentric neutral cable and have had no trouble with the jacketed concentric neutral cable. [Linked Image]

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Charlie Eldridge, Indianapolis, Utility Power Guy

Charlie Eldridge, Indianapolis Utility Power Guy