Equipment Grounding Conductor Bonded to Metal Enclosure

[Gategator37]

All,

08' NEC 250.148(C) requires a connection from the equipment grounding conductor to a metal enclosure. I have a #1/0 egc being spliced in an enclosure, the electrician has tapped off of this #1/0 ground with a #8 and bonded the #8 to the enclosure. From what I have learned in the past, you always bond to the enclosure with the largest egc that is spliced in the enclosure, and since we only have one egc (#1/0) then that would be the minimum size that can be used.

I am having problems finding the code reference that specifically states this... Or is 250.148(C) the only reference I have?

As always I appreciate your help.

 

[jumper]

250.102(D) Size — Equipment Bonding Jumper on Load Side
of an Overcurrent Device.
The equipment bonding jumper
on the load side of an overcurrent device(s) shall be sized
in accordance with 250.122.

 

[petersonra]

I wonder how he came to select a #8?

If it is metal conduit the bond is not even needed.

 

[iwire]

I wonder how he came to select a #8?

It is what he had and fit the lugs.

If it is metal conduit the bond is not even needed.

It may not be needed for safety but 250.148 may well require it.