What Ed Beal says, but let me backfill some details.

Here is our cast of characters.

If you're confused about neutral and ground, perhaps it's the welder has a NEMA 10 connector. (Hot hot neutral). This was the standard dryer plug in the old days before safety was important.

For some strange reason a lot of people still use NEMA 10 plugs on welders.

Anyway, if your welder has a NEMA 10 plug, change it to a NEMA 6 plug (Hot-hot-ground) which is on the same shelf 2 bins over. Welders need ground if you don't like being dead.

Now it is a simple matter of getting “cordage” which is special flexible cable made for daily flexing - well you know, every one of your home appliances has cordage. Don't use Romex for this, it's not made to flex and will quickly get metal fatigue, crack, heat up, arc and start a fire.

You need 3-wire, which will be black white green wire colors. Here's the important part: mark the white wire black on both ends. It will not be used as neutral, but rather as second hot. (the two hots are interchangeable, you can use red if you want but it doesn't matter).

What Ed Beal says, but let me backfill some details.

Here is our cast of characters.

If you're confused about neutral and ground, perhaps it's the welder has a NEMA 10 connector. (Hot hot neutral). This was the standard dryer plug in the old days before safety was important.

For some strange reason a lot of people still use NEMA 10 plugs on welders.

Anyway, if your welder has a NEMA 10 plug, change it to a NEMA 6 plug (Hot-hot-ground) which is on the same shelf 2 bins over. Welders need ground if you don't like being dead.

Now it is a simple matter of getting “cordage” which is special flexible cable made for daily flexing - well you know, every one of your home appliances has cordage. Don't use Romex for this, it's not made to flex and will quickly get metal fatigue, crack, heat up, arc and start a fire.

You need 3-wire, which will be black white green wire colors. Here's the important part: mark the white wire black on both ends. It will not be used as neutral, but rather as second hot. (the two hots are interchangeable, you can use red if you want but it doesn't matter).

Also note that in European style cords, ground is yellow/green, hot1 is brown, and hot2 is light blue. (well they call that last one neutral, but in a North American context it's hot2 because of split-phase).

If you're confused about neutral and ground, perhaps it's the welder has a NEMA 10 connector. (Hot hot neutral). This was the standard dryer plug in the old days before safety was important.

For some strange reason a lot of people still use NEMA 10 plugs on welders.

Anyway, if your welder has a NEMA 10 plug, change it to a NEMA 6 plug (Hot-hot-ground) which is on the same shelf 2 bins over. Welders need ground if you don't like being dead.

Now it is a simple matter of getting “cordage” which is special flexible cable made for daily flexing - well you know, every one of your home appliances has cordage.

You need 3-wire, which will be black white green wire colors. Here's the important part: mark the white wire red on both ends, It will not be used as neutral, but rather as second hot.

Now, it wires up simply. On the NEMA 14-30 plug, you have 4 pins and 3 wires. Don't connect anything to neutral.

What Ed Beal says, but let me backfill some details.

Here is our cast of characters.

If you're confused about neutral and ground, perhaps it's the welder has a NEMA 10 connector. (Hot hot neutral). This was the standard dryer plug in the old days before safety was important.

For some strange reason a lot of people still use NEMA 10 plugs on welders.

Anyway, if your welder has a NEMA 10 plug, change it to a NEMA 6 plug (Hot-hot-ground) which is on the same shelf 2 bins over. Welders need ground if you don't like being dead.

Now it is a simple matter of getting “cordage” which is special flexible cable made for daily flexing - well you know, every one of your home appliances has cordage. Don't use Romex for this, it's not made to flex and will quickly get metal fatigue, crack, heat up, arc and start a fire.

You need 3-wire, which will be black white green wire colors. Here's the important part: mark the white wire black on both ends. It will not be used as neutral, but rather as second hot. (the two hots are interchangeable, you can use red if you want but it doesn't matter).