mkgrady
Senior Member
- Location
- Massachusetts
I keep trying to understand the danger of wiring a seperatley derived portable generator to a panel without switching the neutral. I understand the difference between separately derived and non-seperatley derived. I understand automatic and manual transfer switches, interlocks, etc. I have tried drawing out a sketch of a service including the distribution transformer, service entrance, GECs, EGCs and how they connect or don't connect during a transfer. I just can't follow how a ground fault while running on a generator can be hazardous. I get that in these situations the bond between neutral and the EGC at the generator can be removed to make it code compliant and I get that this generator should no longer be used as a stand alone power system. What am I missing? Has anybody seen a sketch that shows this dangerous current path that needs to be avoided?