Thank you all for the information. It may not have anything to do with the neutral, but we had a situation where the neutral in a A-A-A-N, B-B-B-N, C-C-C-N configuration was carrying excessive current and overheating and the jacket was literally melting. The conduit of course was also overheating.
I need information on installing a 3 phase, 4 wire system in rigid conduit from the transformer secondary to a secondary bus. Specifically, is there an explanation out there regarding placing conductors for each phase and the neutral in conduits. More specifically, the pairing should be...
