grounded corner delta service

[bjb]

On a 480 volt 3 phase 3 wire service. I need to ground the center leg at the CT cabinet. My question is does that ground need to be sized according to 250.66 or 250.122. If anyone can provide me with the correct code ref as for as the correct way to bond and ground this particular service i would appreciate it. Thanks

 

[augie47]

If you are bonding your CT cabinet to your grounded conductor, you would size the jumper per 250,66 per 250.102(C)
(assuming your CT cabinet is ahead of your service disconnect)

 

[bjb]

Thanks Augie47, the grounded conductor on the B phase would be terminated to the lug provided with the cabinet which is bonded to the enclosure. In which case would you not bond your grounded conductor to the cabinet?

 

[augie47]

Thanks Augie47, the grounded conductor on the B phase would be terminated to the lug provided with the cabinet which is bonded to the enclosure. In which case would you not bond your grounded conductor to the cabinet?

sounds as if the lug already has it bonded

 

[kwired]

It does not matter if there is a grounded phase or a grounded neutral, the rules are the same for either, the deal is thatg you have a grounded conductor.

NEC calls it a grounded conductor for a reason - it is the conductor that is intentionally grounded. Many people just don't see a grounded phase as being right and second guess everything about it. Truth is you can ground any conductor of any system, and the system will work, you just can't ground two conductors.