Protect your critical industrial equipment. Learn why rats infest electrical panels, PLC cabinets, and MCC rooms, and discover how to prevent expensive downtime.

Why Rats Love Electrical Panels, PLC Cabinets & Control Rooms (And How to Stop Them)

27 Jun 2026

Electrical panels, PLC cabinets, MCC panels, and control rooms are the nervous system of any industrial facility. Unfortunately, they also happen to be one of the favorite hiding places for rodents.

A single rat inside an electrical enclosure can chew through wiring, damage expensive electronic components, trigger equipment failures, and even cause electrical fires. The resulting downtime often costs far more than the repair itself.

In this blog, we’ll explore why rodents are attracted to electrical panels, the risks they pose, and the most effective ways to protect your critical equipment.

Why Do Rats Enter Electrical Panels?

1. Warm Environment

Transformers, power supplies, contactors, VFDs, and other electrical components generate heat.
Rodents naturally seek warm spaces, especially during cooler months.

2. Safe Shelter

Electrical enclosures offer:

Protection from predators
Minimal human disturbance
Dark enclosed spaces
Ideal nesting locations

These conditions make control cabinets attractive nesting sites.

3. Wiring Makes Perfect Nesting Material

Rats constantly gnaw to keep their teeth from overgrowing. Inside electrical panels, they chew:

Cable insulation
Communication cables
Sensor wiring
Fiber conduits
Flexible tubing

They also use shredded insulation as nesting material.

4. Food Sources Nearby

Factories often have:

Food waste
Packaging materials
Grain storage
Cafeterias
Dust accumulation

These nearby food sources encourage rodent activity around electrical installations.

What Damage Can Rodents Cause?

Cable Damage
Chewed insulation can expose live conductors, leading to:

Short circuits
Ground faults
Signal failures

Equipment Failure
Rodent damage can affect:

PLCs
HMIs
Variable Frequency Drives (VFDs)
Industrial PCs
Control relays
Sensors

Even minor cable damage can halt an automated production line.

Fire Hazards
Exposed conductors increase the risk of:

Electrical arcing
Sparks
Overheating
Fire inside the enclosure

Production Downtime
Unexpected shutdowns may result in:

Lost production
Missed delivery schedules
Emergency maintenance
Increased labour costs

Expensive Repairs
Replacing:

Wiring harnesses
PLC modules
Industrial controllers
Custom cables

can quickly become costly.

Warning Signs of Rodent Activity

Maintenance teams should watch for:

Chewed wires
Droppings
Nesting materials
Gnaw marks
Unusual burning smell
Frequent breaker trips
Random PLC faults
Communication failures

Why Traditional Rat Control Often Falls Short

Many facilities rely on:

Rat poison
Glue traps
Snap traps

However, these methods have limitations:

They require regular maintenance.
Dead rodents can create hygiene issues.
Poison may not be suitable near food or sensitive equipment.
They address existing infestations rather than discouraging rodents from entering in the first place.

A Preventive Approach: Ultrasonic Rodent Repellents

Industrial ultrasonic rodent repellents work by emitting ultrasound waves that create an uncomfortable environment for rodents, encouraging them to avoid protected spaces.

Unlike traps or poison, ultrasonic systems offer continuous protection while operating silently and without chemicals. GIZMOCAT® is designed for 24×7 operation, is maintenance-free, and is suitable for electrical panels, PLC cabinets, server rooms, CNC machines, and other enclosed industrial spaces.

Proper Installation Matters

A common misconception is that one ultrasonic device can protect an entire factory.

In reality:

Ultrasonic waves travel in straight lines.
Walls, machinery, partitions, and storage racks reduce coverage.
Large facilities typically require multiple strategically placed units based on layout and enclosure size.

If you’re planning to protect your facility, don’t rely on unrealistic coverage claims or one-size-fits-all solutions. Start with a professional site assessment, identify high-risk areas, and choose a rodent protection system engineered for your specific application.

Protect your equipment before rodents turn a minor problem into a major operational failure.