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  2. Earth-leakage protection device - Wikipedia

    en.wikipedia.org/wiki/Earth-leakage_circuit_breaker

    Such devices may be found in the form of either a circuit breaker, known as an earth-leakage circuit breaker (ELCB), or built into a socket (aka receptacle). Voltage-operated ELCBs can still be found in the wild, though these largely fell out of favour after the invention of the current-sensing based RCD (aka GFCI) technology.

  3. 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 protection device, that interrupts an electrical circuit when the current passing through a conductor is not equal and opposite in both directions, therefore indicating leakage current to ground or ...

  4. Circuit breaker - Wikipedia

    en.wikipedia.org/wiki/Circuit_breaker

    Three single-phase Soviet/Russian 110-kV oil circuit breakers 400 kV SF 6 live-tank circuit breakers Electrical power transmission networks are protected and controlled by high-voltage breakers. The definition of high voltage varies but in power transmission work is usually thought to be 72.5 kV or higher, according to a recent definition by ...

  5. 2.2 million Siemens and Murray circuit breakers recalled - AOL

    www.aol.com/news/2010-09-23-2-2-million-siemens...

    About 2.2 million Siemens and Murray circuit breakers are being recalled over concerns a spring clip can break and cause the breakers to fail, the U.S. Consumer Product Safety Commission said.

  6. Three-prong adaptor - Wikipedia

    en.wikipedia.org/wiki/Three-prong_adaptor

    [2] [3] These adapters are illegal in some jurisdictions, in particular throughout Canada. [4] 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]

  7. High-leg delta - Wikipedia

    en.wikipedia.org/wiki/High-leg_delta

    Even when unmarked, it is generally easy to identify this type of system, because the B phase (circuits #3 and #4) and every third circuit afterwards will be either a three-pole breaker or a blank. Current practice is to give separate services for single-phase and three-phase loads, e.g., 120 V split-phase (lighting etc.) and 240 V to 600 V ...