Main Service Disconnect

[jhduke]

We have a project in NJ where we are installing a 1Ø 1000A service. The original layout called for the Ct's to be installed inside the utility transformer and the meter was to be located on a stanchion 10' away. Utility Co. rejected the design and now wants a pad mounted CT Cabinet with a disconnect in case they need to service the CT Cabinet. Is that disconnect now considered my main? or is t still my main breaker at the service? FYI- the service is located approximately 200' from the CT Location. Thanks

 

[GoldDigger]

We have a project in NJ where we are installing a 1Ø 1000A service. The original layout called for the Ct's to be installed inside the utility transformer and the meter was to be located on a stanchion 10' away. Utility Co. rejected the design and now wants a pad mounted CT Cabinet with a disconnect in case they need to service the CT Cabinet. Is that disconnect now considered my main? or is t still my main breaker at the service? FYI- the service is located approximately 200' from the CT Location. Thanks

It is not clear where the service point is, since that is effectively determined by POCO using their own peculiar rules.
The presence of an unfused disconnect without associated (or adjacent) OCPD does not make a main (service) disconnect.

 

[kwired]

We have a project in NJ where we are installing a 1Ø 1000A service. The original layout called for the Ct's to be installed inside the utility transformer and the meter was to be located on a stanchion 10' away. Utility Co. rejected the design and now wants a pad mounted CT Cabinet with a disconnect in case they need to service the CT Cabinet. Is that disconnect now considered my main? or is t still my main breaker at the service? FYI- the service is located approximately 200' from the CT Location. Thanks

Most of the time it is not. Many times it won't even have overcurrent protection in which case it definitely is not.

If the POCO puts a lock on it or otherwise makes it inaccessible to the owner/occupant, it also is not.

Outside of those scenarios - best to check with AHJ.

Around here they normally don't have a disconnect ahead of such a CT cabinet. If they want non energized condition when working in the CT cabinet they kill the transformer. Not very often would they supply a 1000A service single or three phase that supplies more then one customer either, a multi-tenant building would be an exception to that though, but those are sort of a different ballgame with regard to the question asked here.