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A non-contact voltage tester is a tool used for determining the presence of AC voltage (electricity) without touching the wires or items in questions. The sensing tip may be sized to fit into an electrical outlet to check for power at that outlet. The tester indicates the presence of nearby voltage with a visual indicator (such as a light) and/or sound.

See alsoEdit

  • Stud finder - advanced types can detect hidden electrical wiring

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