220 extension cord for tools - Router Forums
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post #1 of 74 (permalink) Old 02-24-2019, 07:50 AM Thread Starter
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Default 220 extension cord for tools

I have a 220 50 amp circuit in my shop for welding which I will use for my 220 bandsaw. Is there any reason not to make a 220 extension cord that would make it easier to change out plugs?

Maybe a gang box with a couple of plugs? I wouldn't be running two tools at a time, but the convenience would be great.

I'm sure someone here has done that so would you give me some tips?

Thanks.

Steve

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post #2 of 74 (permalink) Old 02-24-2019, 08:03 AM
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As long as you use wire capable of handling 50 amps, then no problem.

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post #3 of 74 (permalink) Old 02-24-2019, 10:18 AM
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Quote:
Originally Posted by ger21 View Post
As long as you use wire capable of handling 50 amps, then no problem.
Thatís the first thing that I thought .

The wire in the extension cord would have to be rated for 50 amps as you mention, otherwise if a short occurred ,the breaker wouldnít trip
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post #4 of 74 (permalink) Old 02-24-2019, 10:34 AM
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Voltage and current rating of cord should meet or exceed your current and voltage.
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post #5 of 74 (permalink) Old 02-24-2019, 12:03 PM
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I just did exactly what you want to do. I added a 20 amp plug wired from my welder plug. I only used 12 gauge wire and it's not a great idea but it's for my planer and I'll be standing next to it the whole time it's running so I think I can manage the risk. The best way to do what you suggest is to take the wire from the welder plug and run it into a sub panel. Some sub panels allow you to run a wire out that is direct and not fused. That could allow you to hook up to the welder again without going through another breaker other than the the one in the main panel. That would allow a 30 amp sub panel which could be used for the tools you want to run as none of them should be greater than 20 amps. That should be code compliant I think.
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post #6 of 74 (permalink) Old 02-24-2019, 12:11 PM
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Quote:
Originally Posted by RainMan 2.0 View Post
Thatís the first thing that I thought .

The wire in the extension cord would have to be rated for 50 amps as you mention, otherwise if a short occurred ,the breaker wouldnít trip
More to the point, the equipment at the business end is going to be seriously shortchanged on the voltage it needs to operate; expect the cable to get really hot and self destruct if the equipment is operating at near the rating of the breaker. #6-3 wire/grd...
https://www.ebay.com/itm/50-6-3-SOOW...-/273520619202
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post #7 of 74 (permalink) Old 02-24-2019, 12:11 PM
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A friend of mine had the same issue so made a couple of short 2 ft extension 220volt cords. Same male end to fit the wall 220volt receptical but different female ends on the cords to fit the different 220 machines.
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post #8 of 74 (permalink) Old 02-24-2019, 12:18 PM
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Charles; maybe a couple of inline fuses in a made-up junction box, plugged into the 50A receptacle?
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post #9 of 74 (permalink) Old 02-24-2019, 01:35 PM
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Good thread. What is the maximum length for such a cord? We are talking about a few feet here but curious. I know that regular cords have a limit before a voltage drop.
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post #10 of 74 (permalink) Old 02-24-2019, 01:43 PM Thread Starter
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Quote:
Originally Posted by DaninVan View Post
More to the point, the equipment at the business end is going to be seriously shortchanged on the voltage it needs to operate; expect the cable to get really hot and self destruct if the equipment is operating at near the rating of the breaker. #6-3 wire/grd...
https://www.ebay.com/itm/50-6-3-SOOW...-/273520619202
I'm not sure I understand so let me state what I have. It's a 50 amp breaker with a 220 outlet using an old welder outlet.


I've ordered a plug (50 amp) that matches the outlet receptacle.


Now I need the wire and outlet receptacle (or receptacles) at the other end of the extension cord to plug in my 220 tools.

I see 25' welding extension cords on Amazon with 8 ga. wire, but of course, the plugs don't have the older style of my 220 receptacle.

I was hoping to get a 20-25' extension cord to be able to go outside my shop and work with a future planer or lathe.

Are you saying that if I plug a tool into an extension cord of 8 ga.wire that I could damage my tool?

Sorry, but electrical situations are not my area of expertise, so your help is appreciated. Pretend I know nothing about this situation so explain in simple terms.

Thanks.
Steve

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Last edited by sgcz75b; 02-24-2019 at 01:50 PM.
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