Thanks for the replies, and I understand the normal safety procedures for Lock Out, Tag Out, etc. However to attempt to predict heater failure, or when a heater should be taken out of service before it actual trips a breaker or blows the fuses, a megohmeter reading or hipot test. or some type of test ought to able to be preformed to predict such a failure, and I'm courious about the voltage/current leakage to ground before the fault take place. Thanks Clgman.
