Cheap 4-life
Member
- Joined
- Aug 3, 2020
- Messages
- 380
This grounding stuff can be confusing. So many people contradicting each other. Some say separate Ac an Dc grounding to different rods. Some say use the grids ac ground rod for all grounding of ac and dc. Some say to bond separate ground rods...
The thing that causing my brain the biggest problem is that my inverter has 60v from neutral to ground and 60v from hot to ground which makes 120v.. so I got a 3 pole manual transfer switch. I will connect ground neutral and hot from grid to the transfer switch, one pole for each wire. This will completely disconnect the grid from the critical loads subpanel. I will connect the inverters hot, neutral (but hot) and ground to the 3 poles on the other side of the transfer switch. I’m doing this so the inverter never puts 60v on the grids neutral. Am I doing that right? If I am then I have to install a separate ground rod to ground the case of the inverter. Then the case is connected to the inverters ac output ground (inside the inverter) which would become the subpanels and critical loads ground when the transfer switch is turned to inverter. When transfer switch is turned to grid then subpanels and critical loads ground would be main panels ground. Same with the neutrals.. please help me understand if the extra ground rod is needed for the inverter and if I should bond that rod to the grids rod? That seems like it would defeat the purpose of installing the second rod...
The thing that causing my brain the biggest problem is that my inverter has 60v from neutral to ground and 60v from hot to ground which makes 120v.. so I got a 3 pole manual transfer switch. I will connect ground neutral and hot from grid to the transfer switch, one pole for each wire. This will completely disconnect the grid from the critical loads subpanel. I will connect the inverters hot, neutral (but hot) and ground to the 3 poles on the other side of the transfer switch. I’m doing this so the inverter never puts 60v on the grids neutral. Am I doing that right? If I am then I have to install a separate ground rod to ground the case of the inverter. Then the case is connected to the inverters ac output ground (inside the inverter) which would become the subpanels and critical loads ground when the transfer switch is turned to inverter. When transfer switch is turned to grid then subpanels and critical loads ground would be main panels ground. Same with the neutrals.. please help me understand if the extra ground rod is needed for the inverter and if I should bond that rod to the grids rod? That seems like it would defeat the purpose of installing the second rod...
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