Direct answer: If rats chewed a security camera wire, do not tape it up and power through it. First figure out whether it is low-voltage camera cable or line-voltage wiring, then look for heat, burning smell, moisture, or a tripped breaker before deciding the next move.
Most likely: Most of the time this is exposed low-voltage camera cable that leaves the camera offline but does not trip a breaker. The serious version is when the chew damage reaches line-voltage wiring, a power adapter cord, or a wet exterior splice.
Rodent damage is one of those jobs that looks small until you find where the wire runs and what voltage is on it. Reality check: a dead camera is annoying, but hidden chew damage can become a heat or short problem later. Common wrong move: replacing the camera before checking the cable path and power source.
Don’t start with: Do not start by twisting conductors together, wrapping on electrical tape, or burying the damage behind siding, soffit, or insulation.
One camera lost video or power, and you found tooth marks or missing insulation on a visible cable run.
Start here: Start by identifying whether the damaged run is low-voltage camera cable, Ethernet, coax, or a plug-in power lead.
A breaker trips, a GFCI won’t reset, or the problem started right after rain or rodent activity.
Start here: Treat this as possible energized wiring damage. Shut the circuit off and do not keep resetting it.
The visible damage is near an entry point, but you cannot see the full run or where the cable ties into power.
Start here: Assume there may be more damage than the first bite marks you found and stop short of opening hidden spaces unless you know the circuit is de-energized.
The camera comes on, but the cable sheath is torn, flattened, or missing in spots.
Start here: Do not ignore it just because the camera still works. Exposed conductors outdoors or in an attic usually get worse, especially with moisture and more rodent traffic.
This is the most common outcome with exterior cameras and attic runs. The camera drops offline, but house power stays normal.
Quick check: Trace the cable from the camera to its power source or recorder and look for tooth marks, missing jacket, or copper showing through.
Many cameras use a small power supply plugged into an outlet indoors or in a garage. Rats often chew the softer cord near storage areas.
Quick check: Unplug the adapter and inspect the full cord length, especially near the plug, low to the floor, and where it passes through a wall or cabinet.
If the problem showed up after rain, dew, or washing the exterior, water may be getting into a damaged splice or connector.
Quick check: Look for wet tape, green corrosion, blackened insulation, or a connection hanging loose under eaves or behind the camera mount.
This is the dangerous version. A breaker trips, a GFCI trips, or you notice heat, smell, or buzzing near the damaged area.
Quick check: If any nearby outlet, light, or adapter lost power too, stop treating it like a camera-only problem and isolate the circuit.
The next move depends on whether you are dealing with low-voltage camera cable or energized house wiring.
Next move: If you confirm it is only exposed low-voltage camera cable or a plug-in lead, keep it disconnected and move on to a careful visual inspection. If you cannot tell what the wire is or where it is fed from, treat it as a wiring safety issue and bring in a pro before anyone energizes it again.
What to conclude: A simple dead camera and a damaged house circuit can look similar at first glance. Separating those early keeps you from taking a live-wire risk.
Chewed insulation can arc, short, or heat up, especially outdoors or in attics where moisture and debris are present.
Next move: If there is no heat, smell, or tripping, you have time to inspect the run and plan a proper repair. If there is any heat, smell, repeated tripping, or visible arcing damage, shut off the affected circuit and stop DIY work.
What to conclude: No danger signs usually points to a failed low-voltage run. Danger signs mean the damage may involve energized wiring or a compromised power source.
Rats rarely chew one neat spot and quit. The visible damage is often just the part you happened to find first.
Next move: If the damage is limited to one fully visible low-voltage run, replacement of that entire run is usually the clean fix. If you find multiple damaged spots, hidden sections, or damage near house wiring, stop patching ideas and plan for professional replacement or rerouting.
This is where the repair path becomes clear enough to act without guessing.
Next move: If it is a simple exposed low-voltage run, replace the full damaged cable path and secure it better against future chewing. If the source, voltage, or extent of damage is still uncertain, leave the system off and schedule service rather than experimenting.
Even a good cable repair fails fast if the rats still have the same route and nesting area.
A good result: If the camera runs normally and the cable stays cool with no trips or smell, the immediate problem is resolved.
If not: If the camera still drops out, a breaker trips, or any smell returns, shut it back down and have the wiring path checked professionally.
What to conclude: The job is not finished until both the damaged wiring and the rodent route are dealt with.
Not as a real repair. Tape may cover the damage for a moment, but it does not restore the cable properly, keep moisture out, or address hidden chew points farther down the run. For exposed low-voltage camera cable, replacing the damaged run is usually the right fix.
Low-voltage cable is usually less dangerous than house wiring, but it still should not be left exposed, especially outdoors or where metal edges and moisture are present. The bigger risk is assuming it is low voltage when the damage is actually on a power adapter cord or nearby line-voltage wiring.
Do not take that as a pass. A nicked or partly chewed cable can keep working for a while, then fail after rain, heat, movement, or more chewing. If the jacket is split or copper is exposed, plan on proper replacement.
Call an electrician if a breaker or GFCI trips, there is any burning smell, the damaged wire may be line voltage, or the run disappears into house wiring. A qualified low-voltage or camera installer is a better fit when the problem is clearly limited to exposed camera cable, connectors, or a plug-in camera power lead.
Yes. That is common. If you found one chewed section in an attic, soffit, garage, or crawlspace, inspect the whole visible route and nearby cables. Rodents usually travel the same path more than once.
Usually not. Most of the time the camera is fine and the cable or power lead took the damage. Replace the camera only after the wiring path and power source check out and the camera still will not power up or communicate.