Welder Grounding Conductor

[lizzie14]

If the overcurrent protection is sized under the 200%, the supply conductors are sized in accordance with the duty cycle. How do I size the equipment grounding conductor? In accordance with the overcurrent protection? That might make it bigger than the supply conductors. Help!

 

[electricman2]

See 250.122. EGC is not required to be larger than circuit conductors.

 

[bphgravity]

It is likely the EGC will have to be the same size of the corresponding circuit conductors.