I know the code says Neutral to Earth connection shall be made at every main service disconnection point and then be isolated on every panel afterward. In my case I have an overhead pole mounted meter disconnect with neutral to earth connection, then UG quad threephase wire to a UG vault with the neutral connected to the earth ground rod, then about 10 feet of secondary to the main disconnect panel in the building. I said the customer should also connect neutral to earth bond in the main disconnect panel and then no where else. Isn't this setup correct? The electrician suggested that this would set up a parallel ground path and questioned the logic. I suggested it was code. Any thoughts?
Neutral to Earth Connection
- Thread starter shlcmid
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Re: Neutral to Earth Connection
What about 250.28 on main bonding jumpers which indicates that each service disconnect shall have an unspliced main bonding jumper from the equipment grounding conductor to the grounded conductor. Isn't the customer's main disconnect panel still a service disconnect? Also on 250.24 (5) how can you not bond on the load side of a service disconnecting means? If you bring an equipment grounding conductor into the service disconnect panel, it will also be tied to the load side of that panel at that point, wouldn't it?
What about 250.28 on main bonding jumpers which indicates that each service disconnect shall have an unspliced main bonding jumper from the equipment grounding conductor to the grounded conductor. Isn't the customer's main disconnect panel still a service disconnect? Also on 250.24 (5) how can you not bond on the load side of a service disconnecting means? If you bring an equipment grounding conductor into the service disconnect panel, it will also be tied to the load side of that panel at that point, wouldn't it?
websparky
Senior Member
- Location
- Cleveland, Ohio
Re: Neutral to Earth Connection
Please clarify what piece of equipment is the "service disconnect".
You mentioned the "pole mounted meter disconnect", and " of secondary to the main disconnect panel".
The "seconary" would seem to indicate a xfmr?
Thanks,
Dave
Please clarify what piece of equipment is the "service disconnect".
You mentioned the "pole mounted meter disconnect", and " of secondary to the main disconnect panel".
The "seconary" would seem to indicate a xfmr?
Thanks,
Dave
charlie
Senior Member
- Location
- Indianapolis
Re: Neutral to Earth Connection
a. Consist of service drops or service laterals, and associated metering, or"
Since the meter disconnect is required by and is under the exclusive control of an electric utility, the meter disconnect is not service equipment.
Bottom line, ignore the cash register . . . UH . . . metering equipment and treat the cable past the meter as a customer owned service lateral. Don't forget to install the warning ribbon.
The NEC, in section 90.2(B)(5), states "Installations under the exclusive control of an electric utility where such installations
a. Consist of service drops or service laterals, and associated metering, or"
Since the meter disconnect is required by and is under the exclusive control of an electric utility, the meter disconnect is not service equipment.
Bottom line, ignore the cash register . . . UH . . . metering equipment and treat the cable past the meter as a customer owned service lateral. Don't forget to install the warning ribbon.
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