Location for Intersystem Bonding Bridge/Terminal

[AdamTeeScott]

Doing a resi service and panel upgrade 100->200.
I always upgrade the grounding system with 2 rods as I don't trust old metallic water pipes and I'd need to supplement anyways.
I also need to install the IBT.
Meter and panel locations must remain as drawn.

Question:
1) Can one simply install the IBT into a non-concentric 1/2" KO in the bottom of the meter base and leave it like that? [250.94(A)(4)]
2) Must I also bond it to the house panel's ground bar where the GEC is terminated? [Will do this anyways]
3) Or must it be part of the continuous #6 GEC? [250.94(A)(5) says "...or to the GEC with a #6]

My confusion is that between NEC numbers 4 & 5 in that article there seems to be a lot of options, and (A) states ...it SHALL comply with the following [1-6], not some, but all.

 

[petersonra]

I think it has to be all of the listed conditions. But 4 and 5 are mutually exclusive.

I think your proposal is fine.

 

[augie47]

This Southwire critter is common here GEC runs through it and bonds to communication terminals

 

[jaggedben]

All the ones I've seen seem designed to have the GEC run through them for a quick install. But if you wanted to run a separate 6awg bonding jumper to the ground bar that seems to be allowed too. Simply securing it to a KO (concentric or otherwise) and relying on locknuts for bonding falls short of the code requirements you quoted and is therefore not good enough.

 

[LarryFine]

Question:
1) Can one simply install the IBT into a non-concentric 1/2" KO in the bottom of the meter base and leave it like that? [250.94(A)(4)]

Check with your POCO. We're not allowed to put any grounding in meters here.

 

[AdamTeeScott]

I think it has to be all of the listed conditions. But 4 and 5 are mutually exclusive.

I think your proposal is fine.

"Mutually exclusive" is the term that evaded me at the time of writing. But yes, I agree. Thx

 

[AdamTeeScott]

This Southwire critter is common here GEC runs through it and bonds to communication terminals
View attachment 2565221

I usually use these when I travel from outside, through the meter box, and into the panel but my installation has the GEC going in a different location than where this guy will be located. Plus, I was just curious how others understand that section of the code.

 

[electrofelon]

Simply securing it to a KO (concentric or otherwise) and relying on locknuts for bonding falls short of the code requirements you quoted and is therefore not good enough.

Where are you seeing that in the code?

 

[Steve16]

Don't forget your exceptions as a way around an IBT

 

[jaggedben]

Where are you seeing that in the code?

Sorry, I take it back. I somehow misread the 6awg bonding jumper as a requirement instead of an option.

 

[electrofelon]

Sorry, I take it back. I somehow misread the 6awg bonding jumper as a requirement instead of an option.

I did that recently where I but an IBT into a meter KO with no other conductor. This meter didn't have the small accessory lug. I had to do a double take that it was allowed. The inspector said something about it and I said yeah I was surprised too, but check the code!