Wiring Nema 6-50 receptacle
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  1. #1

    Wiring Nema 6-50 receptacle

    I just bought a miller 211 and would like to wire it to my dryer circuit. I have searched and read lots of posts that talk about making an extension cord with a Nema 6-50 input for the welder and a Nema 10-30 output to plug into the existing receptacle.

    However, I can't find a Nema 10-30 plug locally so I just bought a Nema 6-50 receptacle. How do I wire up the receptacle?

    I have white, red, black, and bear wire wires in the box. From reading I think I gather that I wire the red and black wire to the flat blade, and I can wire either the bear wire or white (neutral) to the round blade which is supposed to be the ground for the welder.

    Is this correct? This is a dedicated circuit for the dryer and it is not used for anything esle. My dryer runs on gas and is plugged into another 120v outlet for power. Should I wire the bear wire or the white wire to the round blade in the Nema 6-50 receptacle?

  2. #2
    Join Date
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    Re: Wiring Nema 6-50 receptacle

    ???

    First, call a wildlife removal specialist and get that bear out of your house!

    The plain wire with no insulation on it is the BARE wire and is the ground wire. The ground wire may also have green insulation on it, so bare or green is the ground wire (or is -supposed- to be!).

    Next, if you have a gas dryer that is plugged in to a 120V outlet (NEMA 5-15R or NEMA 5-20R), then why is there a NEMA 10-30R outlet in there? Unless there used to be an electric clothes dryer and now there is a gas one.

    If you are not -sure- of what you have and how to tell or check if it is 'correct', then STOP! Electrical wiring usually isn't rocket science or brain surgery, but if done wrong or poorly it -can- cause problems. Like burning down the house or killing someone.

    That said, the NEMA 6-50 wiring is HOT-HOT-Ground, which if the wiring follows the industry and Code accepted wire colors should be Black-Black(or Red)-Green(or bare). The white neutral wire is not used for the NEMA 6-50 connections.
    The best laid schemes ... Gang oft agley ...

  3. #3

    Re: Wiring Nema 6-50 receptacle

    i have the same question. In my garage i have a 14-50 receptacle and want to replace it with the Nema 6-50 for my welder. Should i put a marrette at the end of the neutral wire if it is not used?
    Last edited by gogogsr; 05-10-2010 at 09:43 AM. Reason: more info

  4. #4
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    south GA where its hot in summer and cold in winter
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    Re: Wiring Nema 6-50 receptacle

    In older structures and even some new ones, you cannot depend upon the wire colors to be "correctly" wired into the panel box. On the 6-50 plug, you will use the two "flat" blades for your two 110V(more or less) hot legs. In other words go down to your box store (WalMart) or autoparts store and get a 10.00 dollar tester. Test each terminal to determine ground/safety and 110V legs. The two 110V legs should measure in the 220-240 range across the terminals and only 110V to ground. (be careful, hold both test terminals with one hand if possible) If you can trace the circuit back to the box, you should be able to see the wire colors used at the breaker feeding the circuit. If the wire runs uninterrupted, then you can assume that the wire colors have not changed. But if for some reason, the wire is junctioned, then you may want to double check anyway. One of the remaining wires should be used for a ground (probably green). You can put a wire nut on the other wire or trim and tape it.

    The best idea is to run a new circuit from your breaker box if you have the room. If you are using a dryer circuit, you'll need to make sure your dryer is hooked up correctly.
    Last edited by lugweld; 05-10-2010 at 10:59 AM.
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  5. #5
    Join Date
    Apr 2006
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    Re: Wiring Nema 6-50 receptacle

    I am following this post because I am in the same position. I have a new shop with a new panel and need to hook up the welder plug. The box has white and green circuits (?) separate, the white wires are connected to the common from the pole and the green wire from the box is 'bonded" to a rod that the electrician had me bury with the concrete pour. So, does the bare or green wire from the plug go to the white common, or to the green "bonded" side? I am pretty sure it goes to the green, but just want to be safe

    Thanks, Richard

  6. #6
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    Re: Wiring Nema 6-50 receptacle

    Quote Originally Posted by gogogsr View Post
    i have the same question. In my garage i have a 14-50 receptacle and want to replace it with the Nema 6-50 for my welder. Should i put a marrette at the end of the neutral wire if it is not used?
    Yes.
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  7. #7
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    Re: Wiring Nema 6-50 receptacle

    Quote Originally Posted by Mooney1el View Post
    I am following this post because I am in the same position. I have a new shop with a new panel and need to hook up the welder plug. The box has white and green circuits (?) separate, the white wires are connected to the common from the pole and the green wire from the box is 'bonded" to a rod that the electrician had me bury with the concrete pour. So, does the bare or green wire from the plug go to the white common, or to the green "bonded" side? I am pretty sure it goes to the green, but just want to be safe

    Thanks, Richard
    You got it right
    Ed Conley
    http://www.screamingbroccoli.com/
    MM252
    MM211
    Passport Plus & Spool gun
    Lincoln SP135 Plus- (Gone to a good home)
    Miller 125c Plasma 120v
    SO 2020 bender
    Beer in the fridge

  8. #8

    Re: Wiring Nema 6-50 receptacle

    can i plug the welder 6-50 plug directly into a 14-50 receptacle??

  9. #9
    Join Date
    Dec 2007
    Location
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    Re: Wiring Nema 6-50 receptacle

    Quote Originally Posted by gogogsr View Post
    can i plug the welder 6-50 plug directly into a 14-50 receptacle??
    Not Directly

    14-50R (receptacle) needs a 14-50P (Plug)

    They do make adapters to allow you to do this though

    http://store.cyberweld.com/poadne6tone1.html
    Ed Conley
    http://www.screamingbroccoli.com/
    MM252
    MM211
    Passport Plus & Spool gun
    Lincoln SP135 Plus- (Gone to a good home)
    Miller 125c Plasma 120v
    SO 2020 bender
    Beer in the fridge

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