ryan_618
Senior Member
- Location
- Salt Lake City, Utah
Re: neutral as current carrying conductor
I see 250.24(B) violated often when there are only three phase loads. I think it is important to remember that the grounded conductor is the conductor responsible for clearing a ground fault on the supply side of the service, and must be brought to the service equipment if the serving utility provides one at any point. This conductor must be sized at least as large as the required GEC.
The place where I see this violated is where an MCC is used as service equipment. Often the power company company will provide a grounded conductor to the CT can, and the installer will go from the CT can to the MCC with 3 ungrounded conductors and 1 EGC, sized from table 250.122 (undersized).
I see 250.24(B) violated often when there are only three phase loads. I think it is important to remember that the grounded conductor is the conductor responsible for clearing a ground fault on the supply side of the service, and must be brought to the service equipment if the serving utility provides one at any point. This conductor must be sized at least as large as the required GEC.
The place where I see this violated is where an MCC is used as service equipment. Often the power company company will provide a grounded conductor to the CT can, and the installer will go from the CT can to the MCC with 3 ungrounded conductors and 1 EGC, sized from table 250.122 (undersized).