I have a lead wire that that is between the contactor and capacitor. For the third time, the wire will burn at the connector ends twice at the capacitor, and once at the contactor. Each time after replacing the wire, I've noticed that the wire is really warm to the touch. It is a 18 gauge wire that has worked years before, but until now has given me problems. I've tested the capacitor. It is labeled to read 40 mf and the meter showed 38.8. However, the capacitor was not discharged, so I'm not sure if this was an accurate reading.
What could be causing this wiring to burn or at least run so warm?