40 amp sub-panel?

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Old 02-10-09, 08:59 AM
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40 amp sub-panel?

I have a 1960 era house that has all the wiring in metal conduit bu no ground wires. I have an used 40 amp circuit utilizing #8 copper wire that terminates about 30 feet from the main panel which is located in the garage. I am considering turning this circuit into a sub-panel located in the basement for the shop. Questions: Do I have to run a ground into the new sub-panel, ie the conduit will not suffice? Does the ground have to be #8 as well or will #10 copper work? How many circuits could I place in this sub-panel? Is it worth it?
 
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Old 02-10-09, 09:22 AM
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#10 is good up to 60 amps for an EGC.

You can put as many circuits as the panel will hold but not to say it wouldn't over load it.

I don't recommend using the conduit for a ground especially if it's that old.
 
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