Wiring welder receptacle?

[ratdoggy]

I have a receptacle that looks like this......Bottom right on the page.
http://www.groverelectric.com/howto/19_How%20to%20Wire%20an%20Electric%20Welder.pdf

Coming into the box I have a red,black, white and bare copper wires.
I know the white has to be terminated in the box and connected to neutral at my panel
The bare copper goes to the round terminal.
The red and black wires are my question. Since they are both "hot" does it matter which side of the receptacle they get attached to since one blade is wider than the other

 

[sands35]

You don't need the white wire. Stuff it in the back of the box with a wire nut on it.

No it is does not matter which side the black and the red go to.

 

[ratdoggy]

You don't need the white wire. Stuff it in the back of the box with a wire nut on it.

No it is does not matter which side the black and the red go to.

Thanks .....Exactly how I thought it should be.

 

[5mall5nail5]

Yep - no neutral in a welder circuit