ElectronicsNut
DIY
I have a little disagreement between the thoughts of 2 different electricians. No, I am not crazy, I did not have them out at the same time. Maybe I should have. The issue, I have a new Leviton Smart panel that I had installed last year. The bonding and grounding is done at this main service panel. I also have an RV 50AMP panel (had installed 3 years ago) at the other end of the house that does not have its own grounding rod and uses the ground from the main service panel. There also was a discussion regarding if a ground rod was needed at this point, but both were in agreement that the use of the ground from the Main Service Panel was OK. Although, one did not sound positive about it.
Here we go...
I purchased an EG4 6000XP (Off Grid) whole house inverter with a 14.3kW battery that I am installing. The EG4 has 3 main connections, (1) Load, (2) Grid, (3) Generator
The EG4 "Grid" connection gets its 240VAC tie from the RV panel (L1, L2, Neutral, Gnd) which is supplied from the Main Service panel (6AWG). The Critical Loads panel is located next to the Main Service panel. The Critical Loads panel just removes the following items from the Main Service panel, Refrigerator, Security lights, Home Network, Media center and connects them in the Critical Loads panel. All 120VAC (L1 or L2 Neutral and Gnd) and are using Romex from the specific outlet. So they need a ground.
There is a difference with how to handle the grounding at the Critical Loads panel. One electrician said that there is no need for a ground connection between the Main Service panel and the Critical Loads panel since there is already a ground connection from the Main Service panel, through the EG4 and out to the Critical loads panel. Whereas the second electrician said that there should be a ground connection between the Main Service panel buss and that of the Critical loads panel.
I just had a thought. Maybe I should measure the resistance between the Main service panel and the ground inside the Critical loads panel. That could be interesting.
Which method is correct or are both correct?
Thanks in advance for any assistance with this
Here we go...
I purchased an EG4 6000XP (Off Grid) whole house inverter with a 14.3kW battery that I am installing. The EG4 has 3 main connections, (1) Load, (2) Grid, (3) Generator
The EG4 "Grid" connection gets its 240VAC tie from the RV panel (L1, L2, Neutral, Gnd) which is supplied from the Main Service panel (6AWG). The Critical Loads panel is located next to the Main Service panel. The Critical Loads panel just removes the following items from the Main Service panel, Refrigerator, Security lights, Home Network, Media center and connects them in the Critical Loads panel. All 120VAC (L1 or L2 Neutral and Gnd) and are using Romex from the specific outlet. So they need a ground.
There is a difference with how to handle the grounding at the Critical Loads panel. One electrician said that there is no need for a ground connection between the Main Service panel and the Critical Loads panel since there is already a ground connection from the Main Service panel, through the EG4 and out to the Critical loads panel. Whereas the second electrician said that there should be a ground connection between the Main Service panel buss and that of the Critical loads panel.
I just had a thought. Maybe I should measure the resistance between the Main service panel and the ground inside the Critical loads panel. That could be interesting.
Which method is correct or are both correct?
Thanks in advance for any assistance with this
