What should you do if a mouse chewed through a wire? - briefly
Immediately shut off the circuit’s power, remove the chewed section, and install a new insulated replacement. Seal all gaps or entry points to prevent further rodent access.
What should you do if a mouse chewed through a wire? - in detail
If a rodent has severed a cable, turn off the power source at the breaker or fuse box before touching anything. Verify that the circuit is de‑energized with a tester.
Inspect the damaged section. Identify the type of wire (e.g., power, data, low‑voltage) and the extent of the cut. If insulation is stripped or conductors are exposed, treat the area as a potential fire or shock hazard.
Replace or repair the wire according to the following steps:
- Cut back to intact insulation. Use wire cutters to remove the compromised segment, leaving a clean, undamaged length on each side.
- Strip the ends. Remove the appropriate amount of insulation (typically ½ in or 1 cm) to expose copper or aluminum conductors.
- Choose a connection method.
- Secure the splice. Twist conductors together, attach the connector, and cover with heat‑shrink tubing or electrical tape. Ensure no exposed metal remains.
- Mount the repaired section. Run the wire through a conduit, cable tray, or protective sleeve to shield it from future gnawing.
- Restore power. Turn the breaker back on and test the circuit with a multimeter or the intended device.
Prevent recurrence by implementing rodent‑proofing measures:
- Seal entry points around walls, floors, and vents with steel wool, caulk, or metal mesh.
- Install conduit or armored cable in areas prone to infestation.
- Place traps or ultrasonic deterrents near vulnerable wiring.
- Keep the environment clean, removing food sources that attract rodents.
If the damaged wire supplies critical equipment, consult a licensed electrician before attempting repairs. Failure to follow code‑compliant procedures can result in fire, electric shock, or equipment damage.