Wire size question


Old 08-09-15, 07:15 AM
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Wire size question

I want to run wire to my shed from the main panel in my house. It will be to a small sub panel. I need to run it close to 300' so I'm not sure the wire size. It will used used for minor things, light plugs, hand saws and such. It is the distance that concerns me. Its a small ahed 10x16. Did.not know if I could get by with #10 or if I have to use #8.
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Old 08-09-15, 07:25 AM
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You will need #6 copper wire e.g. 6-3 UF with ground cable to give you 240 volts x 30 amps or two allotments of 120 volts x 30 amps. (600' round trip, near worst case voltage drop about 3%)

It might be wired into a shed subpanel with a master breaker and four 20 amp branch circuit breakers in it.
Old 08-09-15, 07:57 AM
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Welcome to the forums! I know you only need small circuits...........now. What about future proofing it as AllanJ said?
Old 08-09-15, 04:55 PM
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Didn't realize handsaws needed power!
Old 08-10-15, 06:46 AM
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At that distance you would need minimum of #6-3 UF-B copper, which is going to be about $2.50 / ft and get you two 20A circuits (multiwire circuit) or maybe a bit more with a small panel (assuming you're using tools with small motors). If you can find a vendor that sells #6-2 UF-B you could use that for a single 20A circuit, but I'm guessing the price isn't much better than #6-3 given that it is more rare.

For about $1.90 / ft you can switch to #2-2-4-6 aluminum USE/MHF cable and run a 40A subpanel (roughly 4 20A circuits)
Old 08-12-15, 08:27 AM
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Wow I did no think it would need that large of size, thank you
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