teco
Senior Member
- Location
- Mass north shore
Hello
Only my 2nd post so here goes. I need to supply a new tool with three cord drops and it needs 480 volts 250 amps three phase 4-wire each drop. The connected load is aprox 200 amps each. They want me to use 3/0 - 5-wire cord type PPE they already own from wiring other tools with smaller loads. The problem is most of the three phase load is power supplies and drives and the like and I believe up to 70% is nonlinear load. There is also a panel built in which also uses the neurtal. Even with 4/0 after derating I come out with about 221 amps. Any input would help.
Thanks.
Only my 2nd post so here goes. I need to supply a new tool with three cord drops and it needs 480 volts 250 amps three phase 4-wire each drop. The connected load is aprox 200 amps each. They want me to use 3/0 - 5-wire cord type PPE they already own from wiring other tools with smaller loads. The problem is most of the three phase load is power supplies and drives and the like and I believe up to 70% is nonlinear load. There is also a panel built in which also uses the neurtal. Even with 4/0 after derating I come out with about 221 amps. Any input would help.
Thanks.