220 Volt Welder Circuit


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Old 03-21-19, 04:24 PM
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220 Volt Welder Circuit

What size circuit breaker, wire gauge? I have an 8 foot run. Conduit is installed.

Thank you, Charlie.
 
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Old 03-21-19, 04:33 PM
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Welcome to the forums.

Look at the ID tag on your 240v welder. It should tell you the operating current.
What does it say ?
 
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Old 03-21-19, 04:37 PM
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Oh, have not purchased the welder yet. Just setting up and getting ready. I need a circuit that I can also use for 220 V compressor, separately of course.

TY, Charlie.
 
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Old 03-21-19, 04:38 PM
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Usually a compressor runs on a 240v 20A circuit and a welder can be from 30A to 50A.
Two circuits.... one for each.
 
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Old 03-21-19, 05:15 PM
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It's probably gonna be 30 Amp. Can I run 3 #12s and if I do go to 40 A is 12 gauge still OK?

TY, Charlie.
 
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Old 03-21-19, 06:04 PM
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240v requires 2 wires (hot-hot) not three. #12 is good for 20 amp on most circuits however with welders wire size may be smaller in some cases do to duty cycle.

You have the cart before the horse. You need the actual devices to plan the circuits.
 
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Old 03-21-19, 06:49 PM
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You need to identify the equipment first.
A compressor could 20 or 30 amp. A welder could 30, 40 or 50 amp.
 
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Old 03-22-19, 06:00 AM
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Yeah, agree. Get the equipment then figure.

Charlie
 
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Old 03-22-19, 06:04 AM
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Compressors that don't come with a cord and plug, usually needing greater that 20A circuits, need to be wired based on the motor name plate HP. A NEMA 50A outlet needed for most 240V welders are only rated to be used with motors up to 3HP. A NEMA 60A is 3.5HP. HP above 3.5 should be hardwired unless you used expensive PIN and Sleeve plugs.
 
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Old 03-22-19, 06:07 AM
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What size conduit did you run without knowing the wire size?
 
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Old 03-23-19, 01:54 PM
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3/4 inch conduit.

Charlie
 
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Old 03-30-19, 06:47 AM
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So I only need 2 wires for 220 Ckt. I have 3 wire plus the ground. Leave the white wire unattached and just add the Grn to the receptacle?

Charlie
 
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Old 03-30-19, 06:52 AM
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It is 240 nominal voltage. Yes two hots and a ground. Cap the white.

What amps does the welder require? What is its duty cycle? Both pieces of info are needed to determine wire size.
 
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Old 03-31-19, 06:31 AM
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Vulcan 220 welder. 110/220 volts. Duty cycle 20%.

Charlie
 
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Old 03-31-19, 07:31 AM
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How many amps, please? .
 
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Old 03-31-19, 09:57 AM
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Titanium 200 welder. Maximum amperage output (amps), 50-200A.

Charlie
 
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Old 03-31-19, 10:49 AM
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Input amps is what is needed to determine the circuit breaker and wiring needed.
What is the model number. When I search 'Titanium 200 welder' it seems it could be anything from 20 to 200 amps depending on the model.
 
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Old 03-31-19, 12:26 PM
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Old 03-31-19, 12:35 PM
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From link:
For use on a dedicated 20A branch circuit.
It doesn't say if 240 or 120 primary amperage. #12 wire will be fine. Use a 20 amp breaker. What plug comes on the welder?
 
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Old 03-31-19, 03:11 PM
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Can't find that info.

In the meantime, this popped up and couldn't resist. Cheap enough.


Charlie
 

Last edited by ray2047; 04-01-19 at 07:32 AM. Reason: Remove link per request.
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Old 03-31-19, 11:35 PM
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Your linl is not a public link.
 
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Old 04-01-19, 06:48 AM
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Please remove the link.

Charlie
 
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Old 04-01-19, 07:31 AM
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I removed the link. Can you explain what you were trying to show?
 

Last edited by ray2047; 04-01-19 at 02:28 PM.
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Old 04-01-19, 02:00 PM
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