Q. What is the Code rule for sizing the equipment grounding conductor for feeder taps, and can you give me an example?
A. Equipment grounding conductors for feeder taps must be sized in accordance with Table 250.122, based on the ampere rating of the overcurrent device ahead of the feeder. In no case is it required to be larger than the feeder tap conductors [250.122(G)].
Example: A 400A breaker protects a set of 500