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  • storts
    replied
    Im Lost

    re you saying there emt runnig to the 220 circut,but no wires in there????or as dano said,if its wired,it has to go some place,You could get luky,not knowing the building,but the old ones the spruce up for rental space,the thing could be wired,and the breaker shut off,They usually run a couple of sub panels in the rehabs ive seen!!!!!Good Luck,and Let us know!,Jack

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  • angus99
    replied
    Thanks for the reply, AnotherDano.

    Sorry, I should have mentioned that all that's left of the "circuit" in his studio is the conduit, but I can use it for the extension I described in option 1.

    Just to be sure: for option 1 (converting an unused 4-wire circuit to 3-wire and extending it), you're saying I can get the 2 hot wires i need for the welder from the red and black wires on the 4-wire coming from the two-pole 30-amp breaker? Then I'd just disconnect the white at the panel, tape it off and make sure the ground is actually grounded?

    Thanks again!

    angus

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  • AnotherDano
    replied
    Option #1 sounds like the most effective and the cheapest.
    Is there any chance of determining why the 220 outlet in the studio is not energized? It might just be a matter of locating the other end of the wiring at the panel and adding a breaker to that exisitng wiring. Run that down first.

    Don't let 220 scare you. It's only 110 twice. On a 220 circuit the neutral is used by any 110v appliances on that circuit - like the timers and blinking lights on a fancy dryer.. Most applications like your son's welder use only two hots and a ground. If there is a neutral (white) wire in addition to a black and a red, it is just ignored. If there is no red wire, the white is used as the second hot - but should be marked as such. (Browse around the electrical dept at the local home improvement center and you'll find electrical tape in colors other than black - that's what they are for; marking wires to indicate their function).

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  • angus99
    started a topic Wiring Angst

    Wiring Angst

    Hi, first post here & I would really appreciate some input from any electrical experts.

    We gave our son an MM180 for Christmas and later learned that the 220 outlet in his studio (he's a sculptor) is not live. The building is totally rewired--except for that circuit.

    The MM180 specs are:

    Input Power
    230 V, 21.7 A, 60 Hz
    Rated Output
    135 A at 22.5 VDC, 30% Duty Cycle
    Welding Amperage Range
    30 - 180 Amps

    In reading here and on other forums, I think I have two options.
    1. extend a 220 circuit that is almost never used another 100 feet to his studio. This is a 4-wire, 120/240-volt circuit, so if I understand correctly, I would have to cap the neutral on either end and make sure the ground is connected correctly. this circuit is fed by a double 30-amp breaker, 10-gauge wire, and is currently about 60 feet long. I would be adding 90 to 100 feet of 10 gauge to it. Does all this sound right? Can I use the two hots coming from the double 30-amp breaker?
    2. run a totally new, dedicated circuit of 10-2 plus ground, in conduit, about 150 feet from panel to receptacle. If I do this, there are only two empty slots in the breaker panel and they are opposite to one another. would I take the hot wires off of two single, 30-amp breakers in this case?


    I've done a fair amount of 110-v wiring in my time; not that much 220. I just want this to be safe and done right.

    Thanks!

    angus
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