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01-30-2021, 08:06 AM
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#1
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Bus Nut
Join Date: May 2017
Location: Houston TX
Posts: 553
Year: 1998
Coachwork: Amtran
Chassis: International
Engine: dt466e
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Welders... extension cord wire gauge
I have a Hobart Handler 140 MIG welder 115v and wanted to run a 100ft extension cord. The outlet is 20 amps. Any tips? Also, is it a bad idea to, on top of the extension cord, plug the welder into a 5 outlet adapter? And if the adapter is 15 amps that defeats the initial 20amp outlet right? Seems obvious but I'm an amateur and just want to make sure. Would a 12 gauge extension cord be enough or should it be 10? Some
Thanks
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01-30-2021, 08:51 AM
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#2
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Bus Geek
Join Date: Sep 2014
Location: Eustis FLORIDA
Posts: 23,659
Year: 1999
Coachwork: Thomas
Chassis: Freighliner FS65
Engine: Cat 3126
Rated Cap: 15
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Quote:
Originally Posted by adic27
I have a Hobart Handler 140 MIG welder 115v and wanted to run a 100ft extension cord. The outlet is 20 amps. Any tips? Also, is it a bad idea to, on top of the extension cord, plug the welder into a 5 outlet adapter? And if the adapter is 15 amps that defeats the initial 20amp outlet right? Seems obvious but I'm an amateur and just want to make sure. Would a 12 gauge extension cord be enough or should it be 10? Some
Thanks
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I've used a regular 100ft extension cord to weld with my Hobart 140.
That was just to weld thin stuff on a bus. Wasn't using a lot of power.
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01-30-2021, 09:00 AM
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#3
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Bus Crazy
Join Date: Oct 2020
Location: Near Flagstaff AZ
Posts: 1,327
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I might get beat up a bit by the more label-conscience sticklers (who are, actually, right...) but I think you'll be fine with that. There are lots of variables here, as the actual current draw will depend upon your welder settings. The two issues here are the voltage drop at the welder end of the cord...meaning you start with 120V at the receptacle but will have some lower voltage at the welder under load. Will the welder work okay? In my experience, yes. That cord is at the smaller end of the range for a 15A cord 100 feet long. The other issue is heat within the extension cord, under load. Out in the open air, on the ground, I don't see an issue. Just don't coil the cord up inside an enclosed container filled with old oily rags..which you're not going to do.
I've run bigger welders on much smaller, and lots longer, wire runs in other countries and had no issues with welder performance or melted wire.
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01-30-2021, 09:14 AM
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#4
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Bus Nut
Join Date: May 2017
Location: Houston TX
Posts: 553
Year: 1998
Coachwork: Amtran
Chassis: International
Engine: dt466e
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Quote:
Originally Posted by EastCoastCB
I've used a regular 100ft extension cord to weld with my Hobart 140.
That was just to weld thin stuff on a bus. Wasn't using a lot of power.
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Thanks. I'll give it a go
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01-30-2021, 09:24 AM
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#5
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Bus Nut
Join Date: May 2017
Location: Houston TX
Posts: 553
Year: 1998
Coachwork: Amtran
Chassis: International
Engine: dt466e
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Quote:
Originally Posted by rossvtaylor
I might get beat up a bit by the more label-conscience sticklers (who are, actually, right...) but I think you'll be fine with that. There are lots of variables here, as the actual current draw will depend upon your welder settings. The two issues here are the voltage drop at the welder end of the cord...meaning you start with 120V at the receptacle but will have some lower voltage at the welder under load. Will the welder work okay? In my experience, yes. That cord is at the smaller end of the range for a 15A cord 100 feet long. The other issue is heat within the extension cord, under load. Out in the open air, on the ground, I don't see an issue. Just don't coil the cord up inside an enclosed container filled with old oily rags..which you're not going to do.
I've run bigger welders on much smaller, and lots longer, wire runs in other countries and had no issues with welder performance or melted wire.
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Thanks for this info! Yea I'm going to run the cord along the wall in a rv/boat storage unit. The wall is metal of course. Plus I'll keep an eye on the cord and feel how hot it gets. I'm gonna be patching up holes in the ground from when I removed the seats. Roof raise and entry stair repair later. And who knows what else
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01-30-2021, 09:55 AM
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#6
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Bus Nut
Join Date: Jul 2020
Location: Sacramento
Posts: 994
Year: 1999
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I had to weld a fence that was 50ft back from the house power, and just ran a plain 12awg extension cord with the two wires hacked into the breaker box for 220v, no ground. It will work, will not give you full power at all. Not safe, do it own risk, have phone ready for 911 call...
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