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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 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 current flowing to another powered conductor.

3. Three-prong adaptor - Wikipedia

   en.wikipedia.org/wiki/Three-prong_adaptor

   If a Ground Fault Circuit Interrupter receptacle is properly functioning, it will interrupt dangerous current to limit the duration of a potentially lethal electric shock from an appliance precisely when the receptacle is not the only conductor to electrical ground (this is a ground fault, by definition).

4. Ground (electricity) - Wikipedia

   en.wikipedia.org/wiki/Ground_(electricity)

   If a second ground fault occurs, a ground fault protection relay must trip the breaker to protect the circuit. On an HRG system, a sensing resistor is used to continuously monitor system continuity. If an open-circuit is detected (e.g., due to a broken weld on the NGR), the monitoring device will sense voltage through the sensing resistor and ...

5. Electrical fault - Wikipedia

   en.wikipedia.org/wiki/Electrical_fault

   A ground fault (earth fault) is any failure that allows unintended connection of power circuit conductors with the earth. [ citation needed ] Such faults can cause objectionable circulating currents, or may energize the housings of equipment at a dangerous voltage.

6. 10 Safety Tips for Hanging Christmas Lights Like a Pro - AOL

   www.aol.com/10-safety-tips-hanging-christmas...

   Additionally, it's a good idea to plug the Christmas lights into a ground-fault circuit interrupter (GFCI) outlet which will automatically shut off power to the lights if it detects electricity ...

7. Ground loop (electricity) - Wikipedia

   en.wikipedia.org/wiki/Ground_loop_(electricity)

   A common example is two electrical devices each connected to a mains power outlet by a three-conductor cable and plug containing a protective ground conductor for safety. When signal cables are connected between both devices, the shield of the signal cable is typically connected to the grounded chassis of both devices. This forms a closed loop ...