324 / | HD | ELECTRICITY: MEASURING AND TESTING |
500 | DF | FAULT DETECTING IN ELECTRIC CIRCUITS AND OF ELECTRIC COMPONENTS {10} |
537 | DF | .~ Of individual circuit component or element {17} |
539 | .~.~ Multiconductor cable {3} | |
540 | DF | .~.~.~> With sequencer |
541 | DF | .~.~.~> For insulation fault |
542 | DF | .~.~.~> Having a light or sound indicator |