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How to wire extension cord to go from welder to generator?

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  • How to wire extension cord to go from welder to generator?

    I want to run my H 187 welder from my generator.

    Does anyone know how to wire in the connectors? I plan on using 8/3 wire. But I forsee a problem. The welder takes a 3 conductor wire. However the generator has a 4 wire inlet.

    The inlet on the extension cord will have to be a 6-50r. The plug on the extension cord will have to be a L14-30 though to plug into the generator.

    How do I go from a 4 conductor inlet on the generator to the 3 conductor wire to the generator?

    Any help is greatly appreciated.
    Shiny new HH187

  • #2
    You do not use the neutral wire, 2 hots and the ground.
    http://www.facebook.com/cary.urka.urkafarms

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    • #3
      Thanks... that is what I was thinking. It looks like I am just going to buy 8/4 and drop the neutral. ****.... wire is awful expensive these days! What's up with THAT?
      Shiny new HH187

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      • #4
        I am not an electrician but why not just use a 3 conductor wire and leave the pin for the 4th wire on the 6-50p disconnected?

        as opposed to have one wire in the cord that is not conected to anything on one end
        Last edited by Dodgepu360; 02-16-2007, 05:03 PM.

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        • #5
          You can do that, 3 wire will work, he could conceivably use the 4 wire at some future point for a house feed if needed.
          http://www.facebook.com/cary.urka.urkafarms

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          • #6
            Originally posted by Dodgepu360 View Post
            I am not an electrician but why not just use a 3 conductor wire and leave the pin for the 4th wire on the 6-50p disconnected?
            There is no "fourth" pin on a 6-50R or P. Just 3. Two hot. One ground.

            3-wire cable is all that's needed for the generator to welder connection.

            Hank
            ...from the Gadget Garage
            MM 210 w/3035, BWE
            HH 210 w/DP 3035
            TA185TSW
            Victor O/A "J" series, SuperRange
            Avatar courtesy of Bob Sigmon...

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            • #7
              does the L14-30 have 4 pins?

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              • #8
                Si,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
                http://www.facebook.com/cary.urka.urkafarms

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                • #9
                  Originally posted by Dodgepu360 View Post
                  does the L14-30 have 4 pins?
                  Yup. The NEMA 14-30 configuration is called "3-wire grounding", which mean it lands an equipment ground (green), a neutral, and two hots.

                  In older generators, neutral and ground were bonded on the generator, but the new versions have a "floating" neutral. No bond. That's important to remember if you want to use your generator for emergency power to your house! Make sure to take the two hots and the neutral! If you don't, there will be no neutral reference for your 120V circuits, and much stuff will let the smoke out.

                  It would be kind of you not to ask how I know this......

                  Hank
                  ...from the Gadget Garage
                  MM 210 w/3035, BWE
                  HH 210 w/DP 3035
                  TA185TSW
                  Victor O/A "J" series, SuperRange
                  Avatar courtesy of Bob Sigmon...

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                  • #10
                    Yep.... I am likely just going to go 8/4, as mentioned I can always find a use for the cord later on if need be. It should work out to be the same cost if I buy in bulk. I need 250 ft of cord (for my generator to transfer switch, welder to genertator, and welder to house current).

                    Still trying to find 8/4 (600 volt), for less than $2.28 per foot though.

                    The 14-30 inlet is wired 4 wire. The 6-50 is inlet is only wired with 3 wires as noted above. Thus my original question as to how to wire them together. Dropping the 4th wire (neutral) on the cord will be the solution.

                    When going generator to household current (into my manual transfer switch), I will heed the advice above and be sure to wire in the neutral!
                    Last edited by cybordolphin; 02-17-2007, 01:26 AM.
                    Shiny new HH187

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                    • #11
                      100' 220V Welder Extension Cord

                      I bought a 100' 10/2 (w/gnd) extension cord from Lowes. Chopped the ends and rewired with NEMA plugs. Been using it for about a year now with no negative effects.

                      Also, I went to my local ACE Hdwe and bought a household Dryer cord (4') AND a household Oven/Range prefab cord (also 4'). I cut the soldered connector rings off and hardwired NEMA plugs to both.....no matter what, if I show up at someone's house to do some work for them, there's always a plug that will work.
                      Lincoln 175+ MIG
                      Lincoln Precision TIG 280

                      Hobart Ironman 210
                      Soon: Plasma Cutter, Spoolgun, Engine-Driven, and Dual-Spool SA Wirefeeder

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                      • #12
                        Welder Extension Cords

                        I suppose one of these days I'm gonna break down and buy a ****** engine-driven welder...
                        Lincoln 175+ MIG
                        Lincoln Precision TIG 280

                        Hobart Ironman 210
                        Soon: Plasma Cutter, Spoolgun, Engine-Driven, and Dual-Spool SA Wirefeeder

                        Comment


                        • #13
                          Originally posted by hankj View Post
                          Yup. The NEMA 14-30 configuration is called "3-wire grounding", which mean it lands an equipment ground (green), a neutral, and two hots.

                          In older generators, neutral and ground were bonded on the generator, but the new versions have a "floating" neutral. No bond. That's important to remember if you want to use your generator for emergency power to your house! Make sure to take the two hots and the neutral! If you don't, there will be no neutral reference for your 120V circuits, and much stuff will let the smoke out.

                          It would be kind of you not to ask how I know this......

                          Hank
                          I know that the hard way too, did it a while back at my Dads house, had to repair a bunch of stuff. I had one of my men wire up a genset for equipment and I told them to do it that way, then without thinking I hooked it up in an outage. Fixxed things for a week.
                          http://www.facebook.com/cary.urka.urkafarms

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                          • #14
                            ok I get it now I had the cord ends opposite

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