I am hoping people here can help me clear up a question about sizing a grounding electrode conductor from an engineering standpoint.
First of all, referring to table 250.66 of the NEC and it's notes, there are lots of books which illustrate the proper use of note 1. What about note 2? Note 2...
From my experience shunt trip breakers(or similar device) is required for commercial kitchens and boiler rooms. The shunt trip breakers are operated manually by personel.
My question is, what code book or books require shunt tripping breakers? Also what conditions warrant them?
