250.64(f)(3) - using a busbar for the GEC

[marmathsen]

This feel like this one of those things where I've always done it a certain way and I'm unclear if I'm interpreting the code correctly now that I need to try something different.

If I look at 250.64(f)(3), am I reading it correctly that I can simply install a supplemental busbar in order to connect all my grounding electrodes? See attached Image

Historically I've always landed all my GECs and bonding jumpers onto the service neutral terminals, but I'm running into issues now because some of the outdoor disconnects I'm installing don't have enough provisions on the neutral terminals to land all my GECs. I know I can do an irreversible splice and land a single wire but can I simply add a busbar instead? And if I do add a busbar, does it need to be a dedicated busbar only for GECs? Or can I add other bonding, like for the other piping systems, or even have the EGC land on it?

I'm a Resi guy and surprisingly haven't had too many instances where I don't have enough space.

Thanks in advance for your input.

Rob

 

[tom baker]

It’s commonly done in comm and industrial blds, the nec has specific requirements for the bus bar. Yes you can land gecs, bond wires on it.

 

[Greentagger]

Also compliant per 250.24(A)(4).

 

[paulengr]

You can/should only land grounds on the neutral bus bar in one place…at the point where the main bonding jumper is used, either at the main panel or the transformer. Everywhere else the neutral and grounds should always be distinct separate circuits. Otherwise all metallic parts become current carrying conductors.