What Is a Ground Fault Circuit Interrupter?
A ground fault circuit interrupter is a protective device that shuts off power when electrical current escapes its intended path. Often called a GFCI, it helps protect people from electric shock. You may find this device in an outlet or a circuit breaker.
Quick Facts About Ground Fault Circuit Interrupter
- Category
- Electrical protection device
- Used for
- Shock protection
- Common confusion
- Arc fault protection
- Also called
- GFCI, Ground fault interrupter
- Often discussed with
- Hot Tub Wiring, Pool Wiring
Key Takeaways About Ground Fault Circuit Interrupter
- GFCI protection can be built into a breaker.
- A tripped device interrupts power to connected equipment.
- Ground fault and arc fault protection address different problems.
How Ground Fault Circuit Interrupter Works
A ground fault circuit interrupter compares current leaving on the hot wire with current returning on the neutral wire. Under normal conditions, the current follows its intended path through the circuit. A difference between those flows signals that some current has taken another path. Related service: Hot Tub Wiring.
Related glossary terms: Ground Fault, Circuit Breaker, Arc Fault Circuit Interrupter.
A ground fault can occur when current escapes through damaged insulation or a wet connection. The GFCI responds by opening the circuit and stopping power to the protected equipment. A breaker-style GFCI can protect a circuit from its place in the electrical panel.
An outlet-style GFCI can also protect connected outlets when the wiring supports that arrangement. The device may have test and reset buttons on its face. A GFCI breaker typically has its test button at the panel.
From the Electrician Pittsburgh team
When we work on hot tub wiring, we check how the GFCI fits the equipment and circuit. We also look at the wiring connections and the location of the protective device. The setup needs to suit the hot tub's electrical design.
Ground Fault Circuit Interrupter in Practice: A Real-World Example
A homeowner adds a hot tub near a patio. The hot tub circuit has a GFCI breaker in the panel that protects the connected equipment.
Related Services
Related Terms
Ground Fault
A ground fault is an electrical fault that occurs when current escapes its intended path and travels toward the ground.
Circuit Breaker
A circuit breaker is an electrical protection device that stops current when a circuit draws too much power or develops a short.
Arc Fault Circuit Interrupter
An arc fault circuit interrupter is an electrical safety device that detects certain dangerous arcing patterns and shuts off power to.
Electrical Grounding
Electrical Grounding is a connection between an electrical system and the earth.
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