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Thread: PM205 L10-50R Plug Wiring

  1. #1

    Default PM205 L10-50R Plug Wiring

    I got my PM205 on friday and finally got the 220v wall socket wired up in my garage with a NEMA L10-50R 3 prong socket and 6 gauge wiring to a 50amp double pole breaker. But the question I had was about the wire colors coming out of the PM205 unit, its green, white, and black. I want to confirm with you guys that the wiring is correct.

    Plug wires from unit:
    Green - neutral White wire from breaker?
    White - 110v hot Red wire from breaker?
    Black - 110v hot Black wire from breaker?

    Without tearing into the unit I not sure if this is correct, basically I just need to know which wire is the neutral wire because the other two can connect to either remaining wires to get the 220v connection. I'm eager to get this thing up and running, thanks Jason.

    edit: after reading the online manual, it stated: Power cord. The power cord must not be kept in a strain or the unit pulled by the cord at any time. Notice that you will have 3 wires coming from the cord. You will see a green wire. This is the ground connection. A white wire and a black wire. These are your two hot connections. Follow the wiring connection directions for your type of welding power plug. I would still like your input on this, just a sanity check to make sure I not missing anything. Thanks.
    Last edited by jas329; 01-11-2010 at 08:55 AM. Reason: got the wire colors mixed up.

  2. #2


    You will be hooking the black and white wires to the breakers as they are both hot and the green wire will go the the groung bus bar in the panel. This is all the wire you will need unless there is a red wire for a 3 phase connection. Let me know if you need any additional electrical help. And remember to never work on a live curcuit! Sparks happen.

  3. #3


    I think I figured it out, you are correct. Both black and white wires from the unit are hot and connect to the red and black hot wires from the NEMA socket. The green ground wire from the unit connects to the white neutral wire from the NEMA socket, which is the return line to the grid transformer and is grounded there and at the main breaker box. I should be good to go.

    Oh I definately made sure the main breaker was off, electricity is something I've always been a little hesistant to work on, but I got help from a my uncle. It was a little hard to work in the dark but better dark than dead, thats what flashlights are for.

    Thanks for the help Wayne!

  4. #4


    Glad you got it worked out.

  5. #5


    I completely missed the NEMA classification you gave the first time and it didn't ring a bell until now. What you have is a dryer plug.

    What is generally used, though it may not be required in all areas, is a nema 6-50p plug.

    Yours should work, but I just wanted to let people know.

  6. #6


    Now that you mentioned it, I took a closer look and the unit came with the NEMA 10-20P plug which I think is only rated for 20A. I thought it was a 10-50P rated for 50A so I went ahead and bought the appropriate (dryer) wall socket NEMA 10-50R to fit the plug.

    Should I upgrade to a 50A rated plug or do you think I will be ok running on the 20A plug that came with the unit? Or should I just completely scrap the 10-50p and switch to a 6-50p?

    Edit: I just read another thread that you posted Mark and you said to ignore the plug that comes with it, I think my task tomorrow is to find a higher rated 10-50P plug or just get a new plug and wall socket. I'll check out whats available at the hardware store and price things out.
    Last edited by jas329; 01-13-2010 at 06:31 AM.

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