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Ground Fault Circuit Interrupter (GFCI)
A ground fault circuit interrupter, or GFCI, is a safety component that cuts off the main power supply when it detects an imbalanced difference in input and output currents. These devices protect individuals from injuries and burns and the equipment from overheating or fires. They have become indispensable devices in a wide variety of environments.
How do ground fault circuit interrupters work?
These devices are incredibly robust in performance and work quickly, sometimes in less than one-tenth of a second. They sense the amount of current flowing and outgoing current, even a current range of 4 to 5 milliamps. Upon detecting any difference, they respond efficiently and shut off or trip the circuit to avoid danger.
Three main benefits of installing GFCIs:
These devices offer a wide variety of benefits; however, the main benefits include that they:
- Prevent shocks
- Avoid damage to appliances/individuals
- Deflect fatal electrical fires
Types of GFCIs:
GFCIs are classified into three types.
- Receptacle GFCIs
They are the same as standard wall outlets and are widely preferred by consumers.
- Circuit breakers GFCIs
They are used as alternate breakers for standard circuit breakers that protect the complete circuit receptacles.
- Temporary/Portable GFCIs
These portable interrupters are ideal for indoor construction environments with mowers, trimmers, and other electrical tools and require testing before use each time.
How often should I test GFCIs?
It is crucial to test these devices appropriately depending on the type of GFCI to use. It is recommended to test them monthly to ensure they operate correctly and check them in the proper place to avoid risks.
Where to install the ground fault circuit interrupter?
Some appliances come with GFCIs built-in and do not require these devices, such as hairdryers. However, these devices are indispensable to install, generally in water proximity areas that mostly increase the conductance of electricity.
Typical environments for GFCIs:
They are suitable for places such as:
- Kitchen
- Bathrooms
- Laundry rooms
- Out-of-doors
- Garages
- Workshops
- Restaurants
- Hotels.
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