Bonding jumper for wire troth

[wirenut46]

I have a troth that has three meters with three panels single phase. It has 4/0 Feeders conductors Al for two of the meters and a number 1 Al for the other meter. What size Conductor do i need to bond the troth. And what is the best way to bond it.

 

[infinity]

Since the trough is on the line side of the service disconnects you would need to connect it directly to the system neutral conductor. Although you cannot really see it in the graphic you would bond the neutral directly to the metal wireway.

 

[augie47]

If you make the connection Rob noted by means of a "jumper" attached to the service neutral, that jumper would be sized from Table 250.66. At this point that size is undetermined as you don't have the supply service conductor size.

 

[kwired]

Size of boning jumper will be dependent on the size of the supply conductor feeding this.

You could also install the terminal block for the grounded conductor(s) directly to the enclosure and kill two birds with one stone.