Code Knows Best

摘要

An electrical contractor called me with questions pertaining to the terminating of the neutral and equipment-grounding conductor (EGC) at a sub-fed panelboard. He was mainly concerned that the local inspector was allowing the grounded (neutral) conductor to be used as a current-carrying conductor as well as an EGC. The inspector also required the EGC, but not always the isolated EGC, to be connected at pull and junction boxes, et al., where installed in the raceway run. He said he knew the National Electrical Code (NEC) covers the permitted use of the neutral conductor and EGC means, but he did not remember where in the NEC the requirements were located.