Hello this is my first post I have a question about a 80mf 440v
motor run capacitor. A power supply Im building requires 2- 80mf 440v
caps I have 2 motor run caps with no polarity. Can they be used?
if so do I have to have a + side? There brand new made in china.
Thanks Jerry

 

Motor caps have terrible voltage dependency...they change capacitance depending on what voltage is across them. You can try them. They don't have a polarity. If they are oil filled caps they will survive (unless they are cheap crap from chyna). If they are "dry electrolytic" the ripple current might make them start smoking. That's a sure sign they are about to blow up.