Per NEC 250.28, separately derived systems, a connection between the transformer grounded conductor (neutral) is to be made either at the transformer or at the first disconnecting means. Per exception #2 it should not be connected at both places if there could be a parallel path for the grounded conductor.
In NEC 250.24 it specifically calls for a connection between the grounded conductor (neutral bus) and the ground bus at the first disconnecting means.
As I read it the grounding for an outdoor service transformer supply and a separately derived system are somewhat different. Am I reading this correctly?
In NEC 250.24 it specifically calls for a connection between the grounded conductor (neutral bus) and the ground bus at the first disconnecting means.
As I read it the grounding for an outdoor service transformer supply and a separately derived system are somewhat different. Am I reading this correctly?