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Thread: 220v/50amp to Shop

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  1. #1

    Default 220v/50amp to Shop

    Hi Gang, I just joined this forum.......I don't think I have been here before....not sure.

    I'm a beginning welder and have managed to stick up a couple of metal buildings and so far they stayed "glued" despite the wind here in NM. I used a wire-feed and the beads aren't "purty", but.......................

    I just acquired an almost new Lincoln AC-225 and my shop isn't wired for 50 amps. I was discussing this with my friend, who wired my shop for 30 amps.
    We buried 10g wire and ran it to a sub-panel in the garage.

    He thought that I might be able to just use a heavy duty 4-6 gauge extension cord to run from my the electrical input at the house since I don't weld that often and not for long at a time.

    I would rather have the shop wired for the welder, actually, but there are other things to consider, not the least of which is the cost. Main thing is that I don't have room for another double breaker in the box.

    The only thing requiring more than 20 amps in my shop, other than the welder, is a large 220v air compressor, which we wired directly into a 30 amp breaker. Since I don't have room in my existing electrial box (at the house) for another double breaker, another thought was why couldn't we go ahead and run a 4-6 gauge wire to the shop and then run a 30 and a 50 off it for the compressor and welder(using the space of the existing double breaker).
    Zat make any sense?

    I'm shooting in the dark at a black target that isn't even there, so any help will be more than welcomed.

    Regards,

    Jim

  2. #2
    Electrician ActionDave's Avatar
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    What does the name plate say on your welder- Amps? Duty cycle?

  3. #3

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    Quote Originally Posted by ActionDave View Post
    What does the name plate say on your welder- Amps? Duty cycle?
    Duty cycle 20%

    Single Phase 60Hz

    Input 230v/50a

    Max output 225

    Thanks,

    Jim

  4. #4
    In the Trades mattbee24's Avatar
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    Well, there are a few things you could do. But first, we need to know a few things.

    First, did you run conduit from your panel in the house to the panel in the shop? If so, What size is it?

    Second, What amperage panel is in the shop, and how many spaces does it have?

    Third, What brand panel do you have in the house?

  5. #5

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    Quote Originally Posted by mattbee24 View Post
    Well, there are a few things you could do. But first, we need to know a few things.

    First, did you run conduit from your panel in the house to the panel in the shop? If so, What size is it?

    Second, What amperage panel is in the shop, and how many spaces does it have?

    Third, What brand panel do you have in the house?
    No conduit was used.

    The panel in the garage has plenty of spaces, but not sure of the amps. I believe, though, it is a 100amp box. My friend gave it to me when he found he needed 200amps in his big RV garage.....for whatever reason.

    The panel at the house is a GE.

    It's a little weird because the guy who built this house lived in the garage while building the house. We have the box on the outside, another panel in the garage and another one in the kitchen.......and the one we added to the shop.

    I have almost decided to replace the 30amp plug for the RV (which is there under the box at the house) with a 50amp plug. Then make an extension cord for the welder and use the same plug. I don't weld that often and when I do, I could unplug the RV, which will kick over to gas for the refer.

    Either way, it seems to be a bit more pricey than I had figured. Maybe I should just sell the welder and get a better 110 model.

    Regards,

    Jim

  6. #6
    Electrician ActionDave's Avatar
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    Colorado
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    You should change the wiring going to your shop, size it for 70A, add a proper disconect, feed the inside panel, run a circut for your welder. Can't cost that much more than a over sized extension cord.

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