Guys I'm no electrical genius. . .I'm familiar with your standard 110-125V household wiring and I know the electrical safety rules but I've never messed with the high-voltage stuff before. That being said I got all the stuff to install a 250V/50A breaker & outlet for my Millermatic 211 so that I stop tripping the stupid, tiny 15A breaker that my outdoor receptacle uses. Here's what I got (I checked the Miller manual to make sure I got the right stuff first): a double pole 50A breaker, a 50A welding receptacle/socket, 25 ft. of 10/3 (with the bare copper wire) outdoor wire, a deep-well outdoor receptacle box, an outdoor face plate with the swing up cover, and PVC conduit and the associated fittings and mounting clamps necessary to hold it in place. Here's what I understand about high voltage outlets, please correct me if I'm wrong. . .the black and red wires both are "hot" and carry 120V each and therefore it doesn't matter which one goes in which side of both the double pole breaker and the socket. When hooked up correctly and you test your outlet with a multimeter, if you place one lead each in the "hot" slots you should get 240V, if you place one lead in a "hot" slot and one in the "ground" you should get 120V, and when you leave the ground lead in and switch to the other "hot" slot you should still get 120V. . .I believe all of that is correct. Here's my question. . .where do the white and copper wires go? I know that inside the breaker box the white wire goes to the community ground bar, but where does it go in the receptacle box? I believe it should go in the lower central ground connection of the receptacle/socket. . .is that correct? I have no idea what to do with the bare copper wire. . .does it attach to the receptacle box ground screw? What about inside the breaker box. I was gonna have an electrician come out and do this for me, but after I got the estimate back they can forget about that! I'm not paying an electricain over $500 to put a single outle 5 ft. away from my breaker box. I priced out the parts first. . .and I got everything for ~$75. . .they want to charge me $100 for parts (which they should be able to get cheaper than I can since they are buying in bulk) and over $400 in labor. . .this is after the guy that came out said the job should only take 1/2 hr. No way am I gonna pay that much for that little amount of work. . .so I just wanna make sure I put the wires in the right spots before I start the job. Thanks!