Despite a fairly robust insulation resistance testing program for feeder cables, the plant has experienced several unscheduled shutdowns that resulted from cable failure. Initially, the failed cables were outside the testing program. But as more cables were added to the schedule in response to this now all feeder cables and many important branch circuit cables are now in the program. And several of those have failed.
Electrical Troubleshooting Quiz - June 20, 2017
Find out why cable failures are persisting in your plant.