Requirements of a Grounded System are expanded to include premises wiring instead of only interior wiring


Grounded Conductor: A system or circuit conductor that is intentionally grounded

The Code: Section 200.3

Connection to a Grounded System

Grounded conductors of premises wiring systems shall be electrically connected to the supply system grounded conductor to ensure a common, continuous grounded system. For the purpose of this section, electrically connected shall mean making a direct electrical connection capable of carrying current as distinguished from induced currents.

Copyright IAEI 2020

Other Notes

The 2020 version of 200.3 replaces “interior wiring” with “premises wiring” in order to clarify that this section doesn’t apply to ONLY wiring inside a building or structure.

Correlates with 250.42 (C): Grounded Conductor Brought to Service Equipment