Welder wiring question

[jbrewer]

Originally Posted by R Bedell

On the above diagram, there is nothing noted about needing a separate Neutral for the 230V application.

True... probably because it's NOT new, and is made in China, and there are more exceptions allowed (by NEC?)

The 4 wire arrangement is the same philosophy as the 3 wire 120V, where neutral and ground are connected together only at the load center....

John

[Jeff in Pa]

Originally Posted by jbrewer

I think most modern 230V items have the ground and neutral tied together ONLY at the panel ...meaning a 4 lug plug but yes, this is the way to use what you have.

John

My four year old Hobart Handler 187 has a 3 prong plug. Two hots and the ground.

[Oak]

You don't need a neutral unless there is something that uses 120 volts inside.

[jbrewer]

Originally Posted by Oak

You don't need a neutral unless there is something that uses 120 volts inside.

Or unless it's an "appliance" and you care about wiring to Code.

[jdroison]

the only diff between ground and neutral is ground is not to be used as a current carrying conductor, it is only for safety. if a unit operates on 220 but has circuits in it that only draw 110 off of one side you must have the neutral to carry the current for the 110 portion. also in this case the neutral should not be bonded to the equipment chassis even tho neutral and ground end up the same in the panel. and true there is a lot of equipment that don't follow these rules.