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Top 7 Common Electrical Hotspots Found During Infrared Inspections

  • Writer: Stephen Fike
    Stephen Fike
  • 5 days ago
  • 3 min read

Electrical failures rarely happen without warning.

In most cases, systems begin showing early signs of stress long before equipment fails. One of the earliest—and most dangerous—warning signs is heat.

Hidden electrical hotspots can develop inside:

  • Electrical panels

  • Switchgear

  • Transformers

  • Motor control centers

  • Bus ducts

  • Breakers

  • HVAC electrical systems

These issues often go unnoticed until they lead to:

⚠ Equipment failure ⚠ Unexpected downtime ⚠ Electrical fires ⚠ Arc flash risks ⚠ Expensive emergency repairs

That’s why facility managers increasingly rely on infrared inspections to identify common electrical hotspots before major failures occur.

At Assured NDT, we help commercial and industrial facilities detect these hidden issues early through advanced infrared thermography inspections.


common electrical hotspots

Quick Answer: What Are Common Electrical Hotspots?

Common electrical hotspots are areas within electrical systems that generate abnormal heat due to loose connections, overloads, failing components, or system imbalances.

Infrared thermography helps identify these hotspots before they cause serious failures.

Why Electrical Hotspots Are Dangerous

Heat is often the first indicator of electrical failure.

When components overheat:

  • Insulation breaks down

  • Connections weaken further

  • Fire risks increase

  • Equipment lifespan decreases

  • System reliability drops

Many hotspots remain invisible during normal visual inspections.

That’s why thermal imaging is so valuable.

Top 7 Common Electrical Hotspots Found During Infrared Inspections

1. Loose Electrical Connections

This is one of the most common issues found during infrared inspections.

Loose connections create electrical resistance, which produces heat.

Common locations:

  • Panel connections

  • Breaker terminals

  • Bus bars

  • Disconnects

Risks:

  • Equipment failure

  • Fire hazards

  • Power interruptions

2. Overloaded Circuit Breakers

Circuit breakers handling excessive electrical loads often begin overheating.

This is common in:

  • Older buildings

  • Expanding facilities

  • Manufacturing plants

  • Commercial buildings with growing electrical demand

Risks:

  • Breaker failure

  • Unexpected shutdowns

  • Fire risk

3. Transformer Hotspots

Transformers often develop thermal issues due to:

  • Load imbalance

  • Cooling problems

  • Aging insulation

  • Internal faults

Risks:

  • Transformer failure

  • Expensive replacement costs

  • Facility-wide outages

Bus systems carry high volumes of electricity throughout facilities.

Even minor connection issues can create significant heat.

Risks:

  • Major outages

  • Fire hazards

  • Distribution failures

MCCs commonly develop hotspots due to:

  • Overloaded motors

  • Loose wiring

  • Aging components

Risks:

  • Production downtime

  • Motor failures

  • Reduced operational efficiency

6. HVAC Electrical Components

HVAC systems are critical in:

  • Hotels

  • Hospitals

  • Data centers

  • Universities

  • Commercial buildings

Overheated electrical components can cause cooling failures.

Risks:

  • Occupant discomfort

  • Equipment shutdowns

  • Revenue loss

7. Backup Power Systems

Generators, transfer switches, and emergency systems often remain untested until emergencies occur.

Infrared inspections frequently find:

  • Loose terminations

  • Overheated switches

  • Generator panel issues

Risks:

  • Failure during outages

  • Major operational disruption

Industries Most Affected by Electrical Hotspots

These issues commonly impact:

Any facility with critical electrical infrastructure should monitor for hotspots.

How Infrared Thermography Detects Hidden Hotspots

Infrared cameras identify heat patterns in energized systems without requiring shutdowns.

This allows technicians to:

  • Identify issues early

  • Prioritize repairs

  • Reduce downtime

  • Improve safety

  • Extend equipment life

It’s one of the most effective predictive maintenance tools available.

NFPA 70B and Hotspot Detection

The updated NFPA 70B standard emphasizes:

Thermal inspections help facilities stay compliant.

Why Facilities Choose Assured NDT

Assured NDT provides:

✅ Certified thermographers ✅ Detailed reporting ✅ NFPA 70B-aligned inspections ✅ Nationwide service coverage ✅ Flexible scheduling

We help facilities identify hidden risks before failures happen.

Schedule Your Infrared Inspection

Don’t wait for overheating equipment to cause downtime.

Contact Assured NDT today to schedule an infrared inspection.

FAQs: Common Electrical Hotspots

1. What causes electrical hotspots?

Electrical hotspots are usually caused by loose connections, overloaded circuits, failing equipment, and load imbalances.

2. Can infrared inspections detect hidden electrical problems?

Yes. Infrared thermography identifies overheating components that may not be visible during standard inspections.

3. Are electrical hotspots dangerous?

Yes. They can lead to fires, equipment failures, downtime, and safety hazards.

4. How often should facilities perform infrared inspections?

Most facilities should perform inspections annually, while critical facilities may need more frequent inspections.

5. What equipment should be inspected?

Panels, switchgear, transformers, breakers, MCCs, HVAC systems, and backup power systems.

 
 
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