Utility CT Cabinet

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SparkyHC said:
In New Jersey we have three Pocos. Since the day I started we have been landing the supply side grounded conductors or neutrals in the CT cabinets of all the Pocos. This directive "not" to allow termination of the neutrals in the CT cabinet is new as far as I am aware. Why, is only speculation at this point. To comply with their directive at this particular project, the neutrals will pass through the CT cabinet unbroken, travel another 125 feet to the service gear where they are bonded to ground with the GEC. What bothers me is that they are asking for grounding conductors to be run from the service to the CT cabinet for safety. This will likely satisfy the NEC and provide for some level of safety but this also adds 250 feet or so of conductor impedance to a fault that occurs at the CT cabinet. The fault will have to travel back to the service and then back to and through the CT cabinet to reach the utility transformers where we hope it will be cleared by a fuse...
If you are a contractor or code official in southern NJ, be aware...
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Why do you have the metering installed so far away from service disconnect? Just curious.
 
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meternerd said:
The only time the neutral is grounded in the meter enclosure is when it's a combo with the main disconnect in the panel (which is now standard because of requirements for outside service disconnects), but those western utilities that go by EUSERC (Electric Utility Service Equipment Requirements Committee) require that the utility section is separated by a barrier and is sealable. The grounding of the neutral is done in the unsealed disconnect side. The utility service neutral lands on an insulated neutral terminal which is bussed or wired to the customer side before it's grounded. Older services may differ, but that's the way it's done now.
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Maybe we should clarify terms and what you say is done. When you say no grounding is done - that likely means no earthing lead, or jumper to other items is installed. One still may have the can bonded to the grounded conductor though, and is done with typical self contained metering sockets. And that would be required if NEC applies to the installation.
 
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