What Is a Ground Fault?
A ground fault is an electrical fault that sends current along an unintended path toward ground. It can happen when damaged insulation lets a live wire touch a metal equipment housing. The stray current can energize exposed metal and create a shock hazard for anyone who touches it.
Quick Facts About Ground Fault
- Category
- Electrical fault
- Used for
- Describing an unintended current path
- Common confusion
- Circuit overload
- Often discussed with
- Pool Electrical Repair, Electrical Troubleshooting
Key Takeaways About Ground Fault
- A ground fault isn't the same as an overload.
- A GFCI detects an imbalance in current.
- Grounding and bonding aren't names for a fault.
How Ground Fault Works
A ground fault changes the path current takes through a circuit. Current normally travels through the intended conductors to a device and returns to its source. A fault creates another path, such as through a metal housing connected to ground.
Related glossary terms: GFCI, Fault Current, Electrical Grounding.
A GFCI compares the current going out with the current returning. A difference can mean current has escaped the intended path. The device opens the circuit if it detects a qualifying imbalance.
A standard circuit breaker responds to excess current, but a fault may not draw enough current to trip it. An overload is different because the circuit carries more current than it should during use. Grounding and bonding help create paths for fault current, but they aren't the fault itself.
From the Earth Electric team
When we check a pool electrical repair, we look for damage around the affected equipment and its wiring. We also check whether the protective device responds as expected. A tripped device can point us toward a fault, but it doesn't identify the damaged part.
Ground Fault in Practice: A Real-World Example
A pool pump's wire insulation wears through where it enters the pump housing. The live wire touches the metal housing, creating a ground fault that trips the GFCI.
Related Services
Related Terms
GFCI
A GFCI is a ground-fault circuit interrupter that helps protect people from electric shock.
Fault Current
Fault current is electrical current that flows along an unintended path because of a fault in a circuit.
Electrical Grounding
Electrical Grounding is a connection between an electrical system and the earth.
Bonding
Bonding is an electrical connection that joins metal parts so they stay at a similar electrical potential.
Earth Electric
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