n8huntsman
New member
- Location
- California
I have a permanent split capacitor two speed motor for a house fan. I was going to install a relay for an automation system (Insteon 2443-222) on the high speed winding because that is the only speed ever used. I decided to check voltages at the switch to see which wire was high speed and which was low. When on low speed, the low speed wire voltage was normal but the high speed wire to neutral was about 83v. I assumed this had to do with where the tap was pulled off the winding, more resistance causing lower voltage. But then when I switched to high speed, the high speed wire was normal, 118v, but to my surprise the low speed wire to neutral jumped up to 155v! How can this be? Is this normal? I know the cap causes a phase shift. Is this phase shift what causes the voltage to elevate?
