CopperTone
Senior Member
- Location
- MetroWest, MA
I have posted before this service scenario now I an at the proper bonding requirements. Here is the layout and type of system.
120/208V 400 Amp 3 phase 4 wire coming in from street underground in Rigid steel conduit.
Hits a 400amp non fused disconnect then the CT cabinet then the 400amp MCB Panel.
No building steel (wood framed) with a 1 1/2" water service coming in near it - metal pipe.
Now I know I want/need 2 ground rods with #6 tied into the main disconnect. I also will use 250.66 to bond the water piping which is a 1/0.
My grounding conductor will originate from the main non fused disconnect? And continue though all the equipment looping through bonding bushings and lugs on each cabinet and land on the ground bar in the MCB Panel?
My question is bonding bushings - Do I need to bond both ends or just one end of each section of conduit between each cabinet? I thought it was just one end.
I saw some of those bonding pictures posted here before
thanks
120/208V 400 Amp 3 phase 4 wire coming in from street underground in Rigid steel conduit.
Hits a 400amp non fused disconnect then the CT cabinet then the 400amp MCB Panel.
No building steel (wood framed) with a 1 1/2" water service coming in near it - metal pipe.
Now I know I want/need 2 ground rods with #6 tied into the main disconnect. I also will use 250.66 to bond the water piping which is a 1/0.
My grounding conductor will originate from the main non fused disconnect? And continue though all the equipment looping through bonding bushings and lugs on each cabinet and land on the ground bar in the MCB Panel?
My question is bonding bushings - Do I need to bond both ends or just one end of each section of conduit between each cabinet? I thought it was just one end.
I saw some of those bonding pictures posted here before
thanks