A GFCI (Ground Fault Circuit Interrupter) protects you by quickly detecting any difference in the electrical current flowing into and out of a circuit and shutting off power if an imbalance is detected. This prevents electric shocks by stopping the flow of electricity in as little as 0.025 seconds when a ground fault (an unintended path of electricity, potentially through a person) occurs, especially in locations near water where the risk is higher. This rapid interruption helps prevent potentially fatal electric shocks and reduces the risk of electrical fires caused by ground faults.
How GFCI Works
- GFCIs monitor the current going into the circuit and compare it to the current returning.
- If there is a difference as small as 5-6 milliamps, the GFCI immediately cuts off power.
- This action prevents electricity from traveling through unintended paths, such as a human body, which can cause electrocution.
Why GFCIs Are Important
- They prevent electrical shocks from damaged appliances or wiring exposed to water.
- GFCIs are essential in areas prone to moisture like bathrooms, kitchens, garages, basements, and outdoors.
- They also help reduce electrical fires by shutting off power before overheating or electrical arcing can occur.
In summary, a GFCI protects people by detecting dangerous ground faults and interrupting electrical flow to prevent shock or electrocution nearly instantaneously.