Skip to main content

    Tools & Testing · Test Instruments

    Receptacle Tester

    A plug-in device with indicator lights that reveals wiring faults such as open ground, reversed polarity, or open neutral.

    Common uses

    Verifying outlet wiring and GFCI operation

    Related terms

    Related diagrams

    Pro launch updates

    Get notified when Pro launches, plus a monthly code-change digest. Email only — no account required.