I just completed my Level 1 thermography class for work, we do all our own electrical panel IR scans and the #1 issue is...loose wires.
I have shot my breaker panel in my Thor RV last time i brought it to work and come across a few loose connections. We like you said also use them to find leaks within walls and light ballast burning up. The HP sometimes uses them at truck stops to catch buring breaks on the Big rigs.. Many uses.
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