Breaker panel bonding question

[outboard1196]

Yet another dumb bonding question.
I have a sub panel going to fed by inverter, no generator or grid.
This was shipped bonded, I want to unbond it because my bond is elsewhere. Left bar is neutral and right bar is ground, do I remove both green bonding screws or an I right that only the left ( neutral) bond screw needs to be removed?
Also, I need to feed panel from right top two breakers? What's the reason for that?
@timselectric

 

[740GLE]

Remove the bonding screw in the left, have all your neutral on that bar, then all your grounds on the bar all the way to the right.

Check with your meter there’s no continuity between neutral bar and ground bar, or neutral and case.

So where are you bonding?

 

[outboard1196]

Remove the bonding screw in the left, have all your neutral on that bar, then all your grounds on the bar all the way to the right.

Check with your meter there’s no continuity between neutral bar and ground bar, or neutral and case.

So where are you bonding?

Thats what I thought, yes meter has no continuity now.
I have a 2 breaker box that's running now with a bond, I have to open it up and see if it's a pain to unbond, or might use the inverter bond.

 

[ricardocello]

I see two green neutral bonding screws (!) The ground bar is to the far right.
Check with an ohm-meter. Edit: ok you did

 

[outboard1196]

I see two green neutral bonding screws (!) The ground bar is to the far right.
Check with an ohm-meter.

Correct the instructions in the box are unclear but if I remove both the case is ungrounded which is not desirable.

 

[DPC]

So where are you bonding?

ya thats good question worth repeating..

 

[outboard1196]

ya thats good question worth repeating..

See above

 

[ricardocello]

Correct the instructions in the box are unclear but if I remove both the case is ungrounded which is not desirable.

Neutral bar on left, ground bar on right, remove left green screw only. Extra ground bar far right (!)
Sheesh.

https://library.industrialsolutions.abb.com/publibrary/checkout/DET-582?TNR=Application%20and%20Technical%7CDET-582%7CPDF&filename=DET582C_PowerMark%20Gold%20Load%20Centers%20100-125%20Amp,%2012-22-24%20Circuit_FactSht.pdf

 

[outboard1196]

Neutral bar on left, ground bar on right, remove left green screw only. Extra ground bar far right (!)
Sheesh.

View attachment 293962

I wasn't confused, just sharing my thought process.

 

[ricardocello]

I wasn't confused, just sharing my thought process.

I was confused. I only know SquareD QO, homeline, and some old cutler hammer panels. Not an electrician.

 

[timselectric]

Yet another dumb bonding question.
I have a sub panel going to fed by inverter, no generator or grid.
This was shipped bonded, I want to unbond it because my bond is elsewhere. Left bar is neutral and right bar is ground, do I remove both green bonding screws or an I right that only the left ( neutral) bond screw needs to be removed?
Also, I need to feed panel from right top two breakers? What's the reason for that?
@timselectric
View attachment 293955

Definitely remove the one on the left. Maybe the one on the right, I can't really see how it's in there.
Continuity testing will tell you for sure.
And yes, top right or left breaker will be the main breaker location.

 

[outboard1196]

And yes, top right or left breaker will be the main breaker location.

It specifically calls out top right slots for back feeding.
Any reason why it's so specific?

 

[timselectric]

It specifically calls out top right slots for back feeding.
Any reason why it's so specific?
View attachment 293977

It is the industry standard. But I don't know why it would matter.
Unless that panel only has provisions for locking the breaker in place, on the right side.

 

[timselectric]

It specifically calls out top right slots for back feeding.
Any reason why it's so specific?
View attachment 293977

Also it shows that you only need to remove the left green screw.
You have one neutral bar (left). And two ground bars (right).

 

[outboard1196]

It is the industry standard. But I don't know why it would matter.
Unless that panel only has provisions for locking the breaker in place, on the right side.

OK, there's no interlock or lockout. Couldn't find anything different between left and right location.

Also it shows that you only need to remove the left green screw.
You have one neutral bar (left). And two ground bars (right).

Correct but it said bonded, which I initially thought was part of the n-g bond but I assume it's bonded to case note.

 

[timselectric]

OK, there's no interlock or lockout. Couldn't find anything different between left and right location.

A backfeed main breaker, must be affixed in place. There should be provisions for this. (A screw or clamping device, to physically hold the breaker in place)

 

[timselectric]

Correct but it said bonded, which I initially thought was part of the n-g bond but I assume it's bonded to case note.

Correct, it's bonded to the enclosure.

 

[outboard1196]

A backfeed main breaker, must be affixed in place. There should be provisions for this. (A screw or clamping device, to physically hold the breaker in place)

I'll check it out.
Thank you.