NEC Art250.21

[Ralphie]

Does Article 250.21 (B) Require all 480 volt Delta systems have a ground fault detectr

 

[Volta]

Does Article 250.21 (B) Require all 480 volt Delta systems have a ground fault detectr

Welcome to the forum!

If the system is ungrounded, IMO, yes.

 

[raider1]

Welcome to the forum.

I agree with Volta. 250.21(B) would required an ungrounded 480 volt delta system to be equipped with ground detectors.

Chris