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Welder plug patter different than wall plug

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doug vose

11-19-2001 15:02:06

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I have a 50/30 amp 250 volt welder (plugs can be switched from horizontal to vertical) and i want to use it, but my wall plug (50 amp 250 volt) is different. the wall plug has two diagonal holes on the bottom, and one vertical hole in the top. The welder is just like a 115 volt plug, only bigger, much bigger. Can I still by an outlet that this style plug can go into, so i just have to put the new outlet on the wall (I got a 100 in my houshold electrics class in school, my teacher said i could instantly get a job as an electrician), or are there adapters that plug into the wall that i can plug the welder into�
Thanks for the help
Doug

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gene b

11-25-2001 19:12:34

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Re: Welder plug patter different than wall plug in reply to doug vose, 11-19-2001 15:02:06

get a wall plate to match if you scored 100 on the test this should be a piece of cake

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Craig

11-25-2001 10:22:59

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Re: Welder plug patter different than wall plug in reply to doug vose, 11-19-2001 15:02:06

Sounds like your wall receptacle is that old style that is no longer used for welders. It was common many years ago on welders and many are still around. I'd replace or add a new receptacle on the wall so you will be ready to plug in any newer welder with that style plug on the cord. If the wires and fuses / circuit breakers are sized correctly then you could just add the new style receptacle in parallel with the old one if you want to keep the old receptacle too.

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DHunter

11-20-2001 03:43:41

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Re: Welder plug patter different than wall plug in reply to doug vose, 11-19-2001 15:02:06

What I do in this same situation is make a heavy duty extension cord adapter. I use a male plug that is compatible to the wall receptacle then about 10 or 15 ft of heavy duty braided three conductor lead. On the other end I install a three gang receptacle box and three receptacles. One for the welder, one for a normal 220 volt plug and a double 110 volt receptacle. I have two of them made, one for each end of my shed and they are very handy. Be sure you wire them up correctly and if you have any doubt ask your teacher or an experienced electrician to help you.

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Cubub

11-19-2001 19:10:25

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Re: Welder plug patter different than wall plug in reply to doug vose, 11-19-2001 15:02:06

If your teacher was right you would definitely verify each wire with a known good volt meter. Do you know who's been there ahead of you? What size is the wire? Are the breakers sized to the wire? Don't assume anything. Be especially careful with electricity, it won't always warn you before you get it. According to the NEMA rated devices chart I'm looking at, the flat bladed receptical you describe is 3 phase no ground, that's THREE HOT WIRES which if adapted, may shock and possibly kill you or someone else if any metal part of the welder is touched. These type have been used for other purposes and may be OK. YOU HAVE TO VERIFY IT!

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john nelson

11-19-2001 18:57:56

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Re: Welder plug patter different than wall plug in reply to doug vose, 11-19-2001 15:02:06

if the plug on the welder has two parallel blads one being narrower, its probably whats called a 50a polorised plug, there are a few specilaty houses which sell them.
john

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Jim K

11-19-2001 16:58:11

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Re: Welder plug patter different than wall plug in reply to doug vose, 11-19-2001 15:02:06

Doug change the plug on the welder to match the outlet in the wall and you will be good to go.
Jim K

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doug vose

11-19-2001 18:06:30

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Re: Re: Welder plug patter different than wall plug in reply to Jim K, 11-19-2001 16:58:11

it is my friends welder, and he is letting me borrow it for a long period of time. I dont think he'd like it if i switch out the plug

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Ken

11-19-2001 16:47:32

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Re: Welder plug patter different than wall plug in reply to doug vose, 11-19-2001 15:02:06

I think you would have make you own adaptor. Making one will probably be as cheap as changing the wall outlet, some wall outlets can run $30. if it is a special order item.

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Dick

11-19-2001 20:10:24

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Re: Re: Welder plug patter different than wall plug in reply to Ken, 11-19-2001 16:47:32

Doug, that plug is probably a "crowfoot" type, originally used for 220 about 40-50 years ago. The codes changed drastically quite a number of years back. The crowfoot was only used in factories, etc., I believe

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Bigdog

11-19-2001 23:44:29

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Re: Re: Re: Welder plug patter different than wall plug in reply to Dick, 11-19-2001 20:10:24

If it's a 220V 50A outlet it's probably an electric range outlet. You can either buy a range cord for the welder or replace this outlet with one compatable with the welder plug.

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Mark Kw

11-20-2001 04:22:11

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Re: Re: Re: Re: Welder plug patter different than wall plug in reply to Bigdog, 11-19-2001 23:44:29

Sounds like a standard welder plug to me. You can buy an outlet at Lowe's or Home Depot, surface mount around 10 bucks and flush mount w/ metal box and cover for about 22 bucks. Most welders come with a 50 amp 250 volt plug NEMA code# 6-50.

Be sure you know what you are doin before pking around with the outlet and breakers and make sure you have enough service to handle the welder. Also be sure to have known good circuit breaker. Just had to change one of mine out last night that went bad. 50 amp @ 250 volt requires a minimum wire size of AWG# 8, for longer runs, you should increase wire size accordingly. Be safe!

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Skinner

11-26-2001 03:44:53

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Re: Re: Re: Re: Re: Welder plug patter different than wall plug in reply to Mark Kw, 11-20-2001 04:22:11

Exactly, bought a New Hobart 175 yesterday and it has the same plug arrangement. Found the recepticle at TSC in the Welding Section (Not electrical) for 15.00

It would be very nice if every 220v device I had did not have a different plug on it! Lets, see, 4 or 5 items, all different. I would say I have over $150 in stupid adapter plugs.

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