For the past several years, the maintenance department has conducted insulation resistance (IR) tests on feeder cables and on conductors of critical branch circuits. Where a test indicates a problem cable, the test is repeated and if the results are consistent the cable is replaced. This program was instituted after a series of cable failure related production shutdowns. While those shutdowns happen less often, they still happen.
Electrical Troubleshooting Quiz — Jan. 16, 2018
Don't confuse a PdM technology with a PM technology.