Sub panel question

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In particular, what appears to be a bus connecting the two bars on opposite sides of the enclosure must be disconnected.

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GoldDigger said:
In particular, what appears to be a bus connecting the two bars on opposite sides of the enclosure must be disconnected.

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Only on the subpanel. But you don't have to do that if you add a ground bus. Just make sure the bonding screw is not tightened in or jumper in place.
In fact, some mfg say NOT to remove the bar.
 
Little Bill said:
Only on the subpanel. But you don't have to do that if you add a ground bus. Just make sure the bonding screw is not tightened in or jumper in place.
In fact, some mfg say NOT to remove the bar.
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Okay so what would it hurt leaving them if I use a ground buss which I intend to because of others recommendation.
 
Eventh said:
Okay so what would it hurt leaving them if I use a ground buss which I intend to because of others recommendation.
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Copied from the install manual...

5
Grounding and bonding
Refer to the NEC or CEC and applicable local codes for proper grounding methods.
A.
For service entrance applications, attach bonding strap to neutral bar. Torque
neutral wire screws to 35 lb-in.
B.
For second tier panels fed from the service entrance panel, DO NOT attach
bonding strap.
 
Eventh said:
I am installing a sub panel next to the main in order to have more breakers. In the main panel, the neutrals and grounds are on the same buss. No ground buss. So I would think that I should only run the neutral from the main to the sub and no extra ground wire. Would that be correct? And also the neutral buss bars in the sub would float from the case.
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Little Bill said:
It won't hurt anything as long as you leave the bonding jumper (small copper piece with green screw) out of the bus/post/hole:)
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Eventh if this sub panel was being used as the main panel then the neutral and ground would be required to be bonded along with the panel frame. So the panel manufacturer gives you a green screw to make this bonding easy.

You are only allowed to bond at the main so the screw doesn't get used when the panel is a sub panel.

When you install the ground kit this will bond the panel to ground but the neutral will be segregated. There should be no connection between neutral and ground in the sub panel.

Don't put over one neutral conductor in any one hole of the neutral bar. There will be plenty of space as there are no ground wires being terminated at the neutral bar.

I wouldn't hook up any of the neutrals until you know what type of arc faults are being used.
 
No disrespect intended but this thread is basically a DIY thread and I think it's time to close it.

Roger
 
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