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OT garage wiring
I'm running a 240V circuit in my garage for a welder down the road. I'm not sure what welder I will get...most likely will try to find one used...
From what I understand I would use 10 ga wire for a 30 amp circuit, 8 ga for 40 A and 6 ga for 50 A. It will be about a 30 ft run for the circuit....
I would just go with 6 ga wire knowing the more than likely that will be way overkill for whatever welder I find, however, that'll be $90 in wire...which in the grand scheme of my garage really isn't too big of a deal but...and in comparison to $60 for 10 ga and $70 for 8 ga I guess not too big of a deal...
I know it would be best if I knew what welder I would be getting but...
why yes, yes i am a moron
Last edited by OIIIIIIIO; 12-01-2012 at 06:59 AM.
My Miller 351 TIG/Stick machine is on a 125 amp beaker. It was tripping a 100 amp breaker about one of of three times I turned it on. But it's an old-technology transformer machine. The newest comparable Miller inverter TIG machine only needs a 75 amp breaker according to a salesman here. If you're planning to get a new machine 75 amps will probably be enough, but if you're going to buy used maybe not.
If you're going to bury the wire, go big. Or as an alternative, bury conduit and then pull in the appropriate wire when you get the welder. One sure thing - you don't want to starve it of power. It may not trip the breaker because of drawing too much current, but voltage drop can make for poor welds. My 120 volt Miller MIG machine goes really funky on an inadequate circuit.
EVERYTHING's easy for the guy who doesn't have to do it.
B. Dash Fabrication
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