B bure961 Senior Member Location Farmingham, MA Jun 30, 2014 #1 I have a 3phase 20hp 480 motor. Controlled by a vfd. My question to anyone does the disconnect switch have to be rated in hp, voltage and amperage.
I have a 3phase 20hp 480 motor. Controlled by a vfd. My question to anyone does the disconnect switch have to be rated in hp, voltage and amperage.