Ground Fault Circuit Interrupters monitor the balance of electrical current moving through a circuit. A GFCI prevents fatal electrical shocks by promptly cutting off the flow of electricity if power goes where it shouldn't, like in a short. The National Electric Code and OSHA requires the use of GFCI's in many applications and use cases.
Additional Info: Panel mount. Cord gauge: L and N, 12 AWG. Trip level: 4 to 6 mA.