NEC 230.95 GFPE on 1KA WYE Services

Whats the reasoning on the GFPE on 1KA solidly grounded WYE services and not other configurations.

It was put in the code in 71', Free Access doesn't have 71' comments, do any of you?

Thanks.

Last edited by Wiresmith; 11/28/18 07:36 PM.