How Do Pests Damage Electrical Wiring?
Rodents Can Chew Through Wire Insulation
Mice and rats regularly gnaw on materials they encounter while moving through a building. Electrical cable coverings can become one of those materials when wires cross their normal travel routes.
The first damage may appear as small tooth marks or scraped insulation. Continued chewing can remove larger sections of the protective coating and leave the cable underneath exposed.
Not every chewed cable has serious electrical damage. However, visible rodent wire damage should not be ignored because the extent of the damage may not be obvious from the outside.
Hidden Wiring Can Be Damaged Behind Walls
Many electrical cables in a home run through places homeowners rarely see. These can include:
- Wall cavities
- Ceiling voids
- Attics
- Basements
- Crawl spaces
- Garages
- Utility rooms
These are also frequent routes that mice and rats take to travel, seek refuge or create their nests.
Once pests enter a cavity in the wall, they can run next to pipes, beams and wires. This way, the damage done by pests in the wall cavity will go unnoticed for some time.
Nesting and Repeated Rodent Activity Can Increase Damage
Rodent activity could result in multiple occasions for electrical damage.
The mice or rats might travel along the same path from the nest to the source of food and back, and if there is electricity passing through that route, the cable would be repeatedly bitten.
Evidence of nesting, fecal matter, urine stain, or bite marks close to the electrical cables means the rodents have been active in that area.
Which Pests Are Most Likely to Damage Electrical Wires?
Mice
Mice can enter surprisingly small openings and move through concealed parts of a home. They are often found in:
- Wall voids
- Attics
- Basements
- Garages
- Storage areas
- Utility spaces
Chewing of the insulation coating around accessible wires by mice is one common activity among mice. Indicators of presence of mice include signs such as droppings, scratchings, nest building materials, or chewing around the wiring.
Where mice have also been active in attic spaces, homeowners may want to consider the cost of ignoring mice and attic insulation damage.
Rats
Rats can also cause substantial rodent electrical damage through persistent gnawing.
Possible signs include:
- Deep tooth marks on cable coverings
- Scraped or missing insulation
- Partially exposed wiring
- Droppings near utility areas
- Gnaw marks on nearby building materials
The fact that the cables are damaged does not indicate the extent of the electrical issue. An expert electrician should establish whether the wires have been affected.
What Are the Signs of Pest-Damaged Electrical Wiring?
Visible Signs Around Electrical Cables
Where wiring is accessible, look for physical evidence such as:
- Small or deep gnaw marks
- Scraped cable coverings
- Missing sections of insulation
- Frayed or damaged cables
- Exposed electrical wiring
- Rodent droppings nearby
- Nesting material around utility areas
- Chewed plastic around cable entry points
Rodent evidence near damaged cables can strengthen the possibility that mice or rats caused the problem.
Electrical Symptoms That May Need Investigation
Electrical problems may sometimes occur when wiring has been damaged.
Possible warning signs include:
- Breakers repeatedly tripping
- Flickering lights
- Intermittent power
- Electrical devices unexpectedly losing power
- Unexplained faults affecting part of the home
An experienced electrician needs to investigate any electrical problem that occurs without cause, particularly when there is visible damage to the wiring.
Can Pest-Damaged Wiring Become a Fire Risk?
Certainly, damaged wiring due to pests may pose an electric or fire hazard in certain scenarios.
If the rodents have stripped sufficient amounts of insulation and caused damage to the wires inside the cable, the wiring may be susceptible to electrical problems. It would depend on the nature, location, and degree of the damages.
Every rodent-infested wiring does not automatically mean that a fire outbreak would take place.
If rodent activity is recurring or the source cannot be identified, Barrie Pest Control Services can help locate active pest areas and possible entry points.
Homeowners can also review available Pest Control Services when determining the appropriate service for an active infestation.