Question

What is the minimum size copper equipment grounding conductor required to serve a multi section motor control center equipped with a 300-amp over current device

Answer 1

The minimum size copper equipment grounding conductor that is required is ; #4 copper

Equipment grounding conductor

An Equipment grounding conductor is a conductive part of ground fault current path which connects the non-conducting metallic parts of the euipment together and also connects the system grounded conductor.

For a copper euipment grounding conductor required to serve a control center connected to a 300 amp over current device the minimum size of copper is #4 copper

Hence we can conclude that The minimum size copper equipment grounding conductor that is required is ; #4 copper.

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