08/03/2026
WHEN A FUSE RUNS HOT, LOOK BEYOND THE FUSE. 🔥
An elevated temperature reading at a fuse doesn't automatically mean the fuse itself is failing.
The location and distribution of elevated temperature can provide clues about the underlying electrical condition:
⚡ Fuse clip: Possible increased contact resistance from poor tension, oxidation, contamination, or mechanical degradation.
⚡ Fuse body: May indicate sustained overcurrent, phase imbalance, or internal element degradation.
⚡ Conductor: Heat extending into the conductor can indicate that excessive resistance at the connection is transferring heat into the conductor and potentially affecting insulation.
For maintenance and reliability teams, the important question isn't simply:
“What's hot?”
It's:
“Why is the temperature elevated here, and what does the thermal pattern tell us about the condition of the electrical system?”
Thermography doesn't replace electrical testing. It helps identify where to look and what to investigate before a developing condition becomes a failure.
At Proactive Maintenance Consultants (PMC), we use quantitative infrared thermography to help facilities identify developing electrical conditions and prioritize corrective action.
Find the pattern. Investigate the cause. Address the condition before it becomes a failure.
