voltage tester
Electrical diagnostic tool
A voltage tester is a device that detects the presence of electrical current in a wire, outlet, or circuit.
Basic models simply indicate whether voltage is present, while more sophisticated versions measure exact voltage levels.
Electricians use them to verify that power is off before working on wiring: Always use a voltage tester before touching any wires.
- multimeterCombined electrical measuring device
- probeThorough examination or tool
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- hot wireBypass vehicle ignition system
- live wireElectrified conductor or dynamo
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