Opened up a 32A rotary isolator (IP65) mounted on an outside wall and found traces of condensation within and corroded terminals/cable ends; not helped by the use of steel screws and I suspect the cage.
I will be replacing the isolator, but how to prevent or lessen corrosion?
A good smear of Vaseline before tightening the terminals comes to mind, but is that a good idea? I guess Vaseline is an insulator (Google seems to suggest it is and it isn't), but when used during the connection of a car starter battery, any reduction in surface contact must be minimal since I have never seen signs of overheating.
If not Vaseline, how about Copperslip?
Clive
