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    jakejosh12's Avatar
    jakejosh12 Posts: 2, Reputation: 1
    New Member
    		  
    #1

    Nov 5, 2009, 07:54 PM
    30amp 10-2 wire to sub panel
    I want to run a 30 amp breaker to a sub panel in my shed. That will run a couple of outlets shop light and a 20amp exhaust fan. The run is 150ft. Will that work?
    Missouri Bound's Avatar
    Missouri Bound Posts: 1,532, Reputation: 94
    Ultra Member
    		  
    #2

    Nov 5, 2009, 10:42 PM
    NOPE. Consider a 40 amp circuit to the sub panel. You will need 4 wires, 3 #6 and 1 #8 for the ground. You will also need a grounding rod. Have you done this type of work before?
    stanfortyman's Avatar
    stanfortyman Posts: 5,598, Reputation: 279
    Electrical & Lighting Expert
    		  
    #3

    Nov 6, 2009, 04:32 AM
    A 30A feeder is the minimum size you can run, so #10 is OK if the bare minimum is OK for you. Thing is, 10/2 is NOT OK. You would need 10/3 to have a 120/240v sub-panel.
    A 120v only panel is technically code legal but makes absolutely no sense to install.

    Like Missouri said, a grounding electrode (ground rod) is required in any detached building with a sub-panel.
    jakejosh12's Avatar
    jakejosh12 Posts: 2, Reputation: 1
    New Member
    		  
    #4

    Nov 6, 2009, 04:35 AM

    I have done some but not to a sub panel so you are saying I need #6 wire and #8? Why so big because of the run? Thanks For the last answer
    tkrussell's Avatar
    tkrussell Posts: 9,659, Reputation: 725
    Uber Member
    		  
    #5

    Nov 6, 2009, 05:32 AM
    Correct, the #10 will result in too high a voltage drop for a 150 foot run.
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