What Is Infrared Electrical Testing and Why Should Facilities Use It?

A thermal camera and an infrared thermometer are different tools

A basic infrared thermometer gives a temperature reading for a spot within its measurement area. A thermal camera produces an image of temperature patterns across the scene. That distinction matters when a proposal promises an “infrared inspection”: a handful of spot readings is not the same deliverable as a documented thermographic survey.

Ask what equipment will be accessible for inspection and what will remain concealed. Camera resolution, viewing distance and the target’s size also affect what can be resolved. FLIR explains the differences between these instruments.

What can an electrical thermal inspection reveal?

Unusual heat patterns may point to a connection problem, excessive loading or an imbalance that warrants further testing. Comparable components need to be evaluated with their operating conditions in mind. One warm area should not automatically be labeled a loose connection.

Fluke notes that several different electrical problems can produce similar thermal patterns and that electrical load measurements are needed to diagnose the cause. Its inspection guidance also emphasizes operating load and repeatable comparisons. See Fluke’s guide to electrical thermal inspections.

For a building owner, the useful question is: what action does this finding justify, and how soon? Request an explanation that separates observed conditions from suspected causes.

Understand what a clean report does not prove

A survey records conditions at a particular time. Lightly loaded equipment or equipment that was not operating may not show the same heating seen during normal production. Enclosed or inaccessible components may remain unexamined; thermal cameras cannot see through ordinary metal enclosures, as Fluke’s inspection guide explains. A report should identify these limitations plainly.

Surface characteristics and reflected heat can also affect interpretation. Thermal-camera settings and operator judgment matter; the brightest color in an image is not, by itself, proof of a defect. FLIR explains how surface properties and reflected temperatures affect thermal readings.

Treat “no abnormality observed” as a finding within the survey’s scope and conditions, rather than a certification that the entire electrical installation is safe.

Plan electrical safety before arranging access

Facility staff should not remove electrical covers to prepare for a photograph or scan. Exposure to energized parts requires appropriate qualifications, procedures and protective measures. Under federal OSHA’s electrical work-practice rule, exposed live parts generally must be deenergized before work unless the stated exceptions apply; work on parts that remain energized is restricted to qualified persons. See OSHA 1910.333.

The inspection team must determine how to obtain useful operating information safely and how any corrective work will be isolated. A planned scan does not authorize live repairs. Have the responsible electrical professional coordinate access and explain any locations that cannot safely be surveyed.

Ask for a report you can use to manage repairs

Before approving a survey, agree on the deliverables. A practical request includes:

• A list of equipment inspected and equipment omitted, with the reasons for omissions.
• Equipment identifiers and locations that match the facility’s records.
• Thermal images and corresponding visible photographs for reported findings.
• The operating conditions and available load measurements at the time of inspection.
• An explanation of each concern, its priority and any additional investigation needed.
• A repair or follow-up recommendation, with responsibility assigned.

This is a purchasing checklist, not a substitute for the inspection provider’s technical procedure. Ask to see a sample report before agreeing to a broad scope described only as “scan all panels.”

Use the findings to plan and verify work

For a restaurant, discuss which refrigeration, cooking and ventilation loads should be operating for a representative survey. For a manufacturer, discuss production cycles. For an office property, identify normal tenant and HVAC operating periods. These conversations help define useful survey conditions without assuming every building operates the same way.

Track findings through investigation, an approved repair plan and completion. Where appropriate, a follow-up image under comparable conditions helps evaluate whether the abnormal pattern was resolved. Retaining prior images also supports comparisons over time, as described in Fluke’s inspection guidance.

Make the next step specific to your facility

Ask your electrical professional to establish an inspection schedule using the equipment’s condition, operating environment, manufacturer guidance and the requirements applicable to the facility. Avoid treating one scan as a complete maintenance program or assuming every location needs the same interval.

If you already have a report, gather it with the affected equipment list and any shutdown restrictions. Contact Halo Electric to discuss commercial electrical troubleshooting, repair needs and project scope, or learn more about Pro Care electrical service.