toothless48
Mechanical
- Oct 27, 2014
- 29
Hello,
My question is whether NEC or other standards prohibit this design choice:
We have an industrial electrical cabinet that receives 480V power from an electrical drop. There is a knife switch disconnect that kills power to the whole cabinet. We would like to be able to disconnect just the 480V branch to our motors and leave the 24V power supplies and PLC active while people work in the hazard area. Is there any guidance in the standards regarding having a lockable rotary disconnect switch on the cabinet in addition to the main knife switch?
Thank you
My question is whether NEC or other standards prohibit this design choice:
We have an industrial electrical cabinet that receives 480V power from an electrical drop. There is a knife switch disconnect that kills power to the whole cabinet. We would like to be able to disconnect just the 480V branch to our motors and leave the 24V power supplies and PLC active while people work in the hazard area. Is there any guidance in the standards regarding having a lockable rotary disconnect switch on the cabinet in addition to the main knife switch?
Thank you