Failing Connections Run Hot Long Before They Fail. Thermal Imaging Finds Them First.

Thermal imaging detects abnormal heat patterns on energized electrical equipment: hot spots that indicate hidden problems such as loose or corroded connections creating high resistance at a lug, breaker, or bus bar; overloaded circuits or breakers running above their intended load; unbalanced 3-phase loads and failing components including motors, transformers, and contactors; failing breakers, fuses, lugs, or terminations that are heating internally before they actually fail or trip; and in some cases insulation damage or moisture causing localized heating in cables or gear. Because most of these issues heat up long before they trip a breaker or start a fire, thermal imaging is ideal for early detection. Our team uses calibrated radiometric thermal imaging cameras and delivers a written report with thermal images, temperature data, and severity ratings for every anomaly found.

For commercial and industrial properties, NFPA 70B calls for infrared scanning at least once every 12 months across all major electrical equipment including panels, switchgear, MCCs, busways, and large disconnects, and every six months for equipment in poor condition or critical operations. One trigger property managers miss: equipment whose last two scheduled maintenance cycles were simply skipped drops to Condition 3 on that basis alone, which puts it on the six-month clock even if it still looks fine. Schedule a thermal imaging inspection before peak load seasons: summer for HVAC loads, and wildfire and PSPS season in California. Schedule after major changes including panel upgrades, large new equipment like EV chargers, CNC machines, or HVAC, or service changes. Schedule any time you have had unexplained breaker trips, burning smells, or repeated equipment failures. For homeowners, a thermal scan is especially valuable in older homes, homes with known aluminum or knob and tube wiring, or before purchasing a property as a supplement to a standard inspection.

They answer different questions and work best together. A standard electrical inspection is primarily de-energized work: panel covers are removed to inspect wiring, breaker sizes, terminations, and code issues, devices are tested for GFCI and AFCI function and polarity, and visual condition is assessed. Thermal imaging is non-contact work done with equipment energized and under load, so you see how things behave in real operation. It quickly scans many components to find heat-based anomalies invisible to the eye including loose lugs, overloaded circuits, and failing components. A traditional inspection checks whether something is wired and sized correctly. Thermal imaging checks whether anything is heating up abnormally when it runs. Our team offers a combined thermal and standard safety inspection at $650 to $950, the most comprehensive single-visit electrical assessment we run.

Yes, and the standard is explicit about it. NFPA 70B Section 7.4.2 requires all accessible and necessary covers to be removed before the infrared inspection, so the camera has direct line of sight to the equipment being scanned. That scan is performed by qualified persons using the required protective equipment and work practices, while the equipment is energized and under real operating load. As an industry practice we want meaningful load on the gear, ideally 40 percent or more, because a lightly loaded fault shows a weaker signature. Covers off is what lets the camera read bus bars, lugs, and breaker bodies directly, and surface scanning through a closed panel door misses the most important components. Where gear already carries installed IR windows, common on switchgear and critical panels in higher arc flash installations, we scan through them, which is our own practice for reducing exposure rather than an exception the standard publishes. Where no viewing window exists, taking covers off changes the job. The equipment stops counting as normally operating the moment the deadfront is removed, because NFPA 70E lists covers in place and secured among the seven conditions of a normal operating condition, and its Table 130.5(C) puts removing bolted covers to expose bare energized parts in the likely-to-produce-an-arc-flash column under any operating condition, where non-contact inspection outside the restricted approach boundary with nothing opened is not likely. So that visit is planned as energized work: a documented arc flash and shock risk assessment, the boundaries established, and the protection matched to the result before anyone opens anything. Where a site cannot accept an open-cover scan at all, NFPA 70B does recognize permanently installed, continuously monitoring temperature measurement devices as an alternative to the periodic survey. Nothing has to be shut down for the scan itself, which is the point: the building keeps running while we work.

Yes. Many insurers now request or require thermal imaging as part of their loss control and underwriting process, especially for commercial and industrial properties. Insurers use IR reports to verify you are proactively managing electrical fire risk, document compliance with the infrared survey requirements NFPA 70B sets, identify and prioritize corrective work, and confirm that identified issues have been corrected. Some carriers treat documented thermography programs as a credit factor and view customers with regular IR inspections as lower risk, and may require updated IR reports at renewal or after major modifications. For homeowners, a thermal report can help demonstrate that hazards have been identified and corrected, especially in older or higher-risk homes. The written report with thermal images is included with every thermal imaging inspection we perform.

A hot spot is a diagnostic flag, not an automatic emergency, but it has to be taken seriously. Our team follows a closed-loop process: detect, investigate, repair, verify, and document. First we confirm and classify, evaluating how many degrees hotter it is than comparable components under the same load, and assigning a severity level of monitor, schedule repair, or immediate action. Then we investigate cause by de-energizing as appropriate and performing a close visual and mechanical inspection for loose or corroded lugs, undersized conductors, overloaded circuits, damaged insulation, or failing breakers. Corrective action depends on findings and may include retorquing or reterminating connections, replacing a failing breaker, redistributing load across circuits or phases, or scheduling a planned outage for more invasive repairs. After repairs the equipment is re-energized and re-scanned to confirm the hot spot has returned to normal temperature. The updated thermogram and repair notes are added to your maintenance documentation.