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Earth Loop & RCD Testers
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  1. Metrel MI3122 Z Line Loop RCD Tester
    £488.00
    Save £149.00
    £339.00
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    Metrel MI 3122 Z Line-Loop / RCD Tester

    • Help screens, automatic loop evaluation and online voltage monitoring
    • Phase sequence testing, upgradeable and triplock function
    • Rechargeable, portable unit with built-in memory
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Earth Loop & RCD Testers

About Earth Loop & RCD Testers

Earth loop testers can be used to easily identify and measure earth loops present within electrical systems, verifying the loop impedance of live electrical circuits. Most work without having to disconnect the electrical supply and are designed not to trip RCDs attached to a circuit.

Also designed to work across phase to earth, phase to neutral and phase to phase connections, earth loop testers can use either 2-wire or 3-wire testing methods to evaluate earth loops.

RCD testers are designed to specifically measure that RCDs are correctly integrated into a circuit. When testing, the RCD tester will apply trip current levels to the RCD, allowing the user to ascertain at what threshold the RCD will trip. Many testers include automatic 'ramp' testing which will cycle through the available ranges until the correct tripping level is ascertained.