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What size wire do you need you need run about 50000 plus watts of electricity The barn sits 300 feet from the main power box?
Saine237
That certainly is a lot!! It sounds like you will need to install a 200 Amp subpanel in your barn. This means that your main power box will have to have room for a 2-pole 200 Amp breaker, in addition to whatever other main breakers that may be in it. As far as wiring: normally you could go with 3/0 copper, or 4/0 aluminum. However, with a 300-foot run, I would size up my wire by at least one. 4/0 for copper, or 250kcmil for aluminum MINIMUM. You only want a maximum of a 5% voltage drop from the main breaker to the barn's subpanel. Using the smaller wire size will probably give you a drastic voltage drop, causing tools to not work properly. Be certain the wire gets buried 18-24 inches below the ground.
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How do you run electricity to a barn?
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