Changing from 220 Range Plug to Welder Plug.

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Hi,I've got a 220 circuit in my garage on a 40 amp breaker. Right now it has a range plug. I'd like to switch it to a welder plug. Do I need to find a receptacle that says "40 amp," or will a 50 amp part work too? This would be an example of what I'm looking at:Leviton 5374-S00 50 Amp, 250 Volt, Flush Mounting Receptacle, Straight Blade, Industrial Grade, Grounding, Black, 1-Pack - - Amazon.comAlternatively, I could just get an adapter. Leaning against that, but I'm curious if that would affect output.Also, is there any functional reason for all the different 220 plug styles?Thanks Everyone.
Reply:You have to change both.
Reply:

Originally Posted by ZLT

Hi,I've got a 220 circuit in my garage on a 40 amp breaker. Right now it has a range plug. I'd like to switch it to a welder plug. Do I need to find a receptacle that says "40 amp," or will a 50 amp part work too? This would be an example of what I'm looking at:Leviton 5374-S00 50 Amp, 250 Volt, Flush Mounting Receptacle, Straight Blade, Industrial Grade, Grounding, Black, 1-Pack - - Amazon.comAlternatively, I could just get an adapter. Leaning against that, but I'm curious if that would affect output.Also, is there any functional reason for all the different 220 plug styles?Thanks Everyone.
Reply:You can wire in that 50 amp welding style plug in place of the 50 amp range plug.I suspect it wasn't really being used for a range so it could be wired any number of ways. Is it a 3 wire or a 4 wire range plug. If it is a 4 wire then yank it out and install the other one onky using the two hots and the green ground and cap the white.If it is a 3 wire and the ground wire is a white neutral like it would be in a actual range outlet then,   If your panel is after the first means of disconnect(after meter) then you should open the panel and move the neutral that is going to neutral bar and move it to the ground bar.If your panel has a main breaker in it as the first means of disconnect then just phase the white neutral wire green and also at the receptacle because now it  is your equipment ground and not a current carrying neutral.  If that range plug is 3 wire and it's wire besides the two hots is already a green ground and not a neutral at all then wire it apples to apples.I think I cover the possible scenario's you could be dealing with hopefully you can suppky some more info on the range plug that is there and how it is wired and I/we can further assist so it is done correctly. The 50 can be used  with only the 40 amp feeding it as I know you were asking that also as long as it has at least #8's for hots. The worst is if you needed more than the 40 you have it would trip. What welder will you be powering up ?
Reply:I have used Range as usual best price.Also most large welders do not come with cord and goto hardware store and buy one at low cost.If need be just install two types of outlets now whatever your welder comes with your covered.Dave

Originally Posted by ZLT

Hi,I've got a 220 circuit in my garage on a 40 amp breaker. Right now it has a range plug. I'd like to switch it to a welder plug. Do I need to find a receptacle that says "40 amp," or will a 50 amp part work too? This would be an example of what I'm looking at:Leviton 5374-S00 50 Amp, 250 Volt, Flush Mounting Receptacle, Straight Blade, Industrial Grade, Grounding, Black, 1-Pack - - Amazon.comAlternatively, I could just get an adapter. Leaning against that, but I'm curious if that would affect output.Also, is there any functional reason for all the different 220 plug styles?Thanks Everyone.
Reply:

Originally Posted by smithdoor

I have used Range as usual best price.Also most large welders do not come with cord and goto hardware store and buy one at low cost.If need be just install two types of outlets now whatever your welder comes with your covered.Dave