SubPanel


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Old 09-26-14, 08:49 AM
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SubPanel

I have a 60 amp subpanel about 2 foot from the main box and have it connected by 6ga wire. My question is, if I replace the 60 amp with a 125 amp rated but only install a 100 amp breaker what size wire would I need. Also the sub box has only 1 ground bar and needs second one; is it connected directly to box or is it separated from the box using rubber or plastic standoffs like it's original one, thanks.
 
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Old 09-26-14, 09:11 AM
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#3 copper for 100 amps, four wires.
Also the sub box has only 1 ground bar and needs second one; is it connected directly to box or is it separated from the box using rubber or plastic standoffs like it's original one,
The original one on insulators is not a ground bar. It is a neutral bar. What you install will be a ground bar and be bonded to the subpanel case by directly mounting metal to metal. The neutral bar in the subpanel is isolated. If it has a bonding screw or strap that is removed.
 
 

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