Devices that interrupt the flow of electricity within 1/40th of a second are known as?

Devices that interrupt the flow of electricity within 1/40th of a second are called ground fault circuit interrupters (GFCIs). GFCIs are designed to protect people from electric shock in areas where water and electricity are in close proximity, such as bathrooms, kitchens, and outdoor outlets. They work by continuously monitoring the electrical current flowing through the circuit; if there is an imbalance, such as when electricity flows through an unintended path (like through a person), the GFCI can quickly disconnect the power.

This rapid response is crucial for preventing potentially fatal electric shocks. Their ability to interrupt the flow of electricity almost instantaneously makes them an essential safety device in modern electrical installations, ensuring that individuals are protected from the hazards associated with ground faults.