There is currently a
project that was reviewed by the local plan review in another state where the project is being done and he wanted to insure that the service was only connected at one point the grounded conductor. There is a utility xfmr. That feeds a 3000A bolted pressure switch in a single enclosure (this is where the N-G bond connection is made) it then feeds a troff with bus routed along the back wall approx 30? in length. The bus is taped at multiple points to feed tenant metering for tenant spaces larger than 200A and at the end there is a tap to a 1200A MCB cabinet that contains 6 meters with integral 200A C.B. for the smaller tenant spaces. We are connecting to one of the tenant meters in the meter bank. Since the meter bank is more for tenant metering, the meter bank / disconnect would be wired as 208V-3ph-4w. that means that the neutral bus is insulated from the equipment ground connection thru the meter to insure only one N-G connection is made at the first service disc. (the 3000A BPS), and the ground for each meter is connected bonded to the cabinet, that is in tern boded to the troff that feeds the meter bank. Is this correct? Also from doing some research the tenant equipment requires a isolated ground would it be acceptable to run an additional ground from the associated meter ground bus to the panel with the isolated ground bar? Then the feeder from the meter bank to the panel would consist of two ground conductors?
project that was reviewed by the local plan review in another state where the project is being done and he wanted to insure that the service was only connected at one point the grounded conductor. There is a utility xfmr. That feeds a 3000A bolted pressure switch in a single enclosure (this is where the N-G bond connection is made) it then feeds a troff with bus routed along the back wall approx 30? in length. The bus is taped at multiple points to feed tenant metering for tenant spaces larger than 200A and at the end there is a tap to a 1200A MCB cabinet that contains 6 meters with integral 200A C.B. for the smaller tenant spaces. We are connecting to one of the tenant meters in the meter bank. Since the meter bank is more for tenant metering, the meter bank / disconnect would be wired as 208V-3ph-4w. that means that the neutral bus is insulated from the equipment ground connection thru the meter to insure only one N-G connection is made at the first service disc. (the 3000A BPS), and the ground for each meter is connected bonded to the cabinet, that is in tern boded to the troff that feeds the meter bank. Is this correct? Also from doing some research the tenant equipment requires a isolated ground would it be acceptable to run an additional ground from the associated meter ground bus to the panel with the isolated ground bar? Then the feeder from the meter bank to the panel would consist of two ground conductors?