- Joined
- Dec 18, 2013
- Messages
- 2,334
Input - single phase 220 vac 30 amp breaker at my service panel. I originally had this wired to the VFD with just 3 wires, Black HOT, White HOT, Green, simple.
Then I got it in my head to re-wire it using 4 wire Black HOT, Red HOT, White Neutral, Green so that I could tap one of the hots and the White Neutral for a 120 vac service at the mill. I read that's the proper way to do this, that there is the potential for the White Neutral to have voltage on it when used for 120 vac service thus you need a 4th wire for the ground.
So should I use the Green ground wire for all grounding, VFD, Motor ground lug, electrical cabinet, etc. and only use the White neutral wire for the 120 vac service?
Then I got it in my head to re-wire it using 4 wire Black HOT, Red HOT, White Neutral, Green so that I could tap one of the hots and the White Neutral for a 120 vac service at the mill. I read that's the proper way to do this, that there is the potential for the White Neutral to have voltage on it when used for 120 vac service thus you need a 4th wire for the ground.
So should I use the Green ground wire for all grounding, VFD, Motor ground lug, electrical cabinet, etc. and only use the White neutral wire for the 120 vac service?