Determination of ground-fault current on common A-C grounded-neutral systems in standard steel or Aluminum conduit

A NEED has been indicated in the electrical industry for information which will enable the design engineer to predict the magnitude of fault current that will flow in a circuit enclosed by metal conduit when subjected to ground fault conditions. The purpose of this paper is to present usable data, obtained by laboratory tests, for the improved design of grounded-neutral circuits in rigid steel or aluminum conduit.