At an existing building with 1200A, 480/277VAC service, have been required to remove the owner's 21Kv to 480V transformer(primary voltage service) and replace it with a 1200A meter service board fed from a 480/277V utility service. NEC 250-32(2), for multiple buildings permits the supply conductors to be run without an equipment ground. As the old service conductors do not have an equipment ground and the building service has a zero sequence ground fault system, can the new metered board be added without replacing the service conductors and adding an equipment ground?
Service Entrance Cables: Ground Wire
- Thread starter jhines
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charlie
Senior Member
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- Indianapolis
Re: Service Entrance Cables: Ground Wire
I am not sure what you are asking but it seems that you are taking a service from an electric utility and eliminating service from the existing primary metered customer primary. If this is the case, it is a new service and you will be required to follow the Code for a new electric service to a stand alone building. The previous service would have no bearing on the new one.
I am not sure what you are asking but it seems that you are taking a service from an electric utility and eliminating service from the existing primary metered customer primary. If this is the case, it is a new service and you will be required to follow the Code for a new electric service to a stand alone building. The previous service would have no bearing on the new one.
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