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  2. Grounding resistance tester - Wikipedia

    en.wikipedia.org/wiki/Grounding_resistance_tester

    A grounding resistance tester also called an earth tester is a ... 25 Ohms to reliably and efficiently ground the ... tester Fluke 1621 digital-25 °C to +70 °C ...

  3. Fluke Corporation - Wikipedia

    en.wikipedia.org/wiki/Fluke_Corporation

    Fluke Corporation is an American manufacturer of industrial test, measurement, and diagnostic equipment, including electronic test equipment. It was started in 1948 by John Fluke while he was employed at General Electric .

  4. Megger Group Limited - Wikipedia

    en.wikipedia.org/wiki/Megger_Group_Limited

    Wee Megger insulation tester Modern version of Megger insulation tester MIT520/2. Sydney Evershed (1858–1939) and Ernest Vignoles (1865–1948) bought the instrument section of Golden Trotter (where they both worked) and founded Evershed & Vignoles Limited on 5 February 1895. [2]

  5. Ground continuity monitor - Wikipedia

    en.wikipedia.org/wiki/Ground_continuity_monitor

    A GCM or ground continuity monitor (also called a ground integrity monitor or ground continuity tester) is an electrical safety device that monitors the impedance to ground of a temporary electrical circuit and can provide indication (or protective trip) in the event impedance rises to an unsafe value. A GCM is either an external testing device ...

  6. Electrical isolation test - Wikipedia

    en.wikipedia.org/wiki/Electrical_isolation_test

    In electrical engineering, an electrical isolation test is a direct current (DC) or alternating current (AC) resistance test that is performed on sub-systems of an electronic system to verify that a specified level of isolation resistance is met. Isolation testing may also be conducted between one or more electrical circuits of the same ...

  7. Residual-current device - Wikipedia

    en.wikipedia.org/wiki/Residual-current_device

    A residual-current device (RCD), residual-current circuit breaker (RCCB) or ground fault circuit interrupter (GFCI) [a] is an electrical safety device, more specifically a form of Earth-leakage circuit breaker, that interrupts an electrical circuit when the current passing through line and neutral conductors of a circuit is not equal (the term residual relating to the imbalance), therefore ...

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