Short Circuit
Hot touching neutral or ground directly, bypassing any load: current spikes to hundreds of amps instantly and the breaker trips immediately. The breaker that re-trips the moment you reset it is reporting a short.
A short is the most dramatic fault and, diagnostically, one of the cleaner ones: something conductive is bridging hot to neutral or ground. Common culprits ranked by frequency: a failed device or appliance plugged into the circuit, a chewed or nicked cable, a wire pinched in a box, water in a fixture, or a screw or nail that found a cable years ago and finally settled in.
The DIY-safe move is subtraction: unplug everything on the dead circuit, reset once. Holds: plug things back one at a time until the offender reveals itself. Trips instantly with everything unplugged: the short is in the fixed wiring, and that is where homeowner troubleshooting correctly ends. Never hold a breaker closed against a short.
Talking to a contractor about this?
Run the project past a licensed electrical pro first. Calls are answered around the clock and routed to a pro serving your area.
- Ground Wire (Equipment Ground) : The bare or green wire that carries no current in normal use.
- Grounding Rod (Grounding Electrode) : The 8-foot copper-clad rod driven into the soil near your meter, connecting your electrical system to the earth itself.
- Bonding : Connecting all the metal parts that could become energized (panels, pipes, pool equipment, gas lines) so they sit at the same voltage and faults trip breakers instead of waiting for a person.
- Ungrounded (Two-Wire) Circuits : Pre-1960s circuits with only hot and neutral, no ground conductor.