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  2. 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 ...

  3. Three-prong adaptor - Wikipedia

    en.wikipedia.org/wiki/Three-prong_adaptor

    A safer and more reliable alternative identified in the US and Canadian electrical codes is to replace the outlet with a Ground Fault Circuit Interrupter (GFCI) breaker outlet. [3] Cheater plugs are also used to break ground loops in audio systems. [5] This practice has been condemned as disregarding electrical safety.

  4. Z-Wave - Wikipedia

    en.wikipedia.org/wiki/Z-Wave

    Z-Wave is a wireless communications protocol used primarily for residential and commercial building automation. It is a mesh network using low-energy radio waves to communicate from device to device, [2] allowing for wireless control of smart home devices, such as smart lights, security systems, thermostats, sensors, smart door locks, and garage door openers.

  5. Glossary of electrical and electronics engineering - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_electrical_and...

    standing wave ratio A measure of impedance mismatch for transmission lines in microwave engineering; the ratio of peak amplitude of a standing wave to its minimum. star-mesh transform A mathematical technique used in circuit analysis. state observer In control theory, that which discovers and reports the internal state of a controlled system.

  6. Arc-fault circuit interrupter - Wikipedia

    en.wikipedia.org/wiki/Arc-fault_circuit_interrupter

    This option includes a listed outlet branch-circuit-type AFCI that is installed on the branch circuit at the first outlet in combination with a listed branch-circuit overcurrent protective device when the following four conditions are met: (a) The "Home Run" circuit must be continuous from the branch circuit overcurrent device to the OBC AFCI.

  7. Circuit breaker - Wikipedia

    en.wikipedia.org/wiki/Circuit_breaker

    In the United States and Canada, these are called GFCI breakers. Earth leakage circuit breaker (ELCB) — This detects current in the earth wire directly rather than detecting imbalance. They are no longer seen in new installations as they cannot detect any dangerous condition where the current is returning to earth by another route – such as ...

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