During a routine electrical thermal imaging survey, a distribution board read a maximum surface temperature of 36 degrees Celsius. On a route covering dozens of boards in a shift, a reading like that does not slow you down. It was cooler than the room on a warm day, no gradient worth annotating, no discoloured connection, nothing that earns a second look. If the thermal image were the whole story, that board would have been marked clean and I would have moved on.
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