stonebreaker
06-30-2006, 01:29 AM
Just bought a Millermatic 175. When I had the house built I ordered a 230 volt socket in the garage specifically for a welder. The electrician installed a NEMA 14-50 4-wire socket.
3966
I just finished building an extension cord with a NEMA 14 plug on one end to match that socket and a NEMA 6-50 receptacle on the other for the plug that came with the machine.
3967
As you can see, the problem is the NEMA 6-50 receptacle only has three wires. When I tested the voltage across the different wires, the voltage across XY on the 14-50 receptacle was 245 volts. The voltage across both XW and YW was 123 volts. So, I wired the extension cord to use X and Y as hots plus the ground, G, giving me 245 volts plus ground. Did I do this right or do I need to change something to keep from frying the welder? One socket on the 6-50 plug is smaller than the other. Does it matter which hot wire I attached to it?
Thanks in advance.
3966
I just finished building an extension cord with a NEMA 14 plug on one end to match that socket and a NEMA 6-50 receptacle on the other for the plug that came with the machine.
3967
As you can see, the problem is the NEMA 6-50 receptacle only has three wires. When I tested the voltage across the different wires, the voltage across XY on the 14-50 receptacle was 245 volts. The voltage across both XW and YW was 123 volts. So, I wired the extension cord to use X and Y as hots plus the ground, G, giving me 245 volts plus ground. Did I do this right or do I need to change something to keep from frying the welder? One socket on the 6-50 plug is smaller than the other. Does it matter which hot wire I attached to it?
Thanks in advance.