ChrisWeathers
New member
Why is a 12.47kV Service Entrance Section required to have an isolated neutral, if it is supplied by a four wire service, but has no line-to-neutral loads, only three wire delta loads?
The best reason I've heard is the neutral conductor shall be tied to the ground bus inside the first compartment that the customer has full, unassisted access to. It shall not make any connection to ground until that point. it ensures that there will never be a circumstance that requires the customer to enter the utility unfused, sealed compartment.
However, couldn't the neutral from the utility be connected to a ground bus in the utility pull section, and then the ground bus continues into the first disconnect compartment, where it can be bonded to the ground electrode system by the customer?
The best reason I've heard is the neutral conductor shall be tied to the ground bus inside the first compartment that the customer has full, unassisted access to. It shall not make any connection to ground until that point. it ensures that there will never be a circumstance that requires the customer to enter the utility unfused, sealed compartment.
However, couldn't the neutral from the utility be connected to a ground bus in the utility pull section, and then the ground bus continues into the first disconnect compartment, where it can be bonded to the ground electrode system by the customer?
