If it fails: the first hour
What the site contact should do before the technician arrives.
- Reference the most recent maintenance report for any panel or circuit flagged as high risk
- Note whether the affected equipment was identified in a prior thermal scan
- Request the maintenance provider expedite a repair visit if the issue matches a previously flagged finding
What fails
Loose connections going undetected between inspectionsPanel and equipment connections loosen gradually from thermal cycling and vibration, and without periodic thermal scanning the first sign is often a failure.
Circuit loads drifting out of safe range as equipment changesFacilities add or swap equipment over time without reassessing circuit capacity, and a maintenance review is often the only point this gets checked.
Breaker and protective device degradationCircuit breakers and protective relays age and can fail to trip properly when actually needed, a condition that is not obvious without testing.
Emergency system readiness gapsEmergency lighting, exit signage and backup power transfer equipment can fail silently between the rare moments they are actually needed, which is why scheduled testing matters.
Grounding and bonding deteriorationGrounding connections corrode or loosen over time, reducing the effectiveness of a building's protection against faults and surges.
Undocumented panel changes creating safety hazardsCircuits get added, moved or relabeled incorrectly over years of ad hoc work, leaving a panel directory that does not match reality, a hazard for the next person working in that panel.
What a service call includes
- Thermal imaging scan of panels and major equipment connections to identify developing hot spots
- Torque verification on panel and equipment connections
- Load assessment against current circuit ratings and equipment inventory
- Testing breaker and protective device operation
- Emergency lighting and exit sign function testing, including battery backup duration
- Grounding and bonding inspection
- Panel directory verification and correction where labeling does not match actual circuits
- Written report with thermal images, findings and a prioritized list of any items needing repair
Preventive checklist
The items a maintenance program should carry for this system. Build a combined checklist across systems with the checklist builder.
Spring
- Test emergency lighting and exit sign battery backup function
- Inspect grounding connections after winter weather exposure
Fall
- Thermal scan panels feeding heating equipment before peak seasonal demand
- Verify panel directories are current before winter service calls increase
Quarterly
- Visual inspection walk of accessible panels for signs of overheating or damage
- Spot-check high-load circuits feeding critical equipment
Annual
- Full thermal imaging scan of the full electrical distribution system
- Full load assessment and panel directory audit
- Testing of transfer switches and backup power equipment if present
What it costs
| item | typical range | what moves it |
|---|---|---|
| Scheduled maintenance visit, per panel | $150 to $400 | Number of panels and building complexity |
| Annual maintenance program, per building | $1,000 to $3,500 per year | Building size, number of panels, and whether thermal imaging is included in every visit |
| Full thermal imaging survey | $300 to $900 | Number of panels and equipment locations scanned |
| Emergency lighting testing and certification | $200 to $600 | Number of fixtures and whether documentation for code compliance is required |
National ranges. Local labor, access, after-hours timing and materials move them. Multi-site programs usually price below one-off calls.
How to choose a provider
- Ask whether thermal imaging is included in every scheduled visit or offered only as a separate service
- Confirm the provider documents findings with images, not just a checklist, so issues can be tracked over time
- Ask how load assessments are handled when new equipment is added between scheduled visits
- Check whether emergency lighting and backup power testing is included in the standard program
- Ask for a sample report to see the level of detail and how prioritization is communicated
Questions
What is the difference between electrical maintenance and electrical repair?
Maintenance is scheduled inspection work intended to catch developing problems before they cause a failure. Repair addresses a fault or outage that has already occurred.
How often should thermal imaging be done on electrical panels?
At least annually for a full survey, with more frequent scans on panels feeding critical or high-load equipment.
Why does emergency lighting need to be tested if it works fine every time it is checked?
Battery backup systems can hold a visible test but fail to sustain the required duration during an actual outage, which is why timed function testing matters, not just a quick on-off check.
Can an electrical maintenance program reduce the risk of a fire?
Yes, most electrical fires start at loose or failing connections that generate heat over time, and catching those conditions with thermal imaging before they progress is the core purpose of a maintenance program.