An electricity manhole is a little room buried in the street or sidewalk. It’s where utility workers access electric cables, switches, and other dangerous stuff. (In the old days, the majority of workers were men, so the term “manhole” stuck.)
When a cable fails, workers splice together new and old sections of the cable inside these manholes. Workers enter the manhole through a round entry, usually covered by—you guessed it—a heavy manhole cover.
Inside, manholes are hot, dangerous, and creepy. If a cable fails, it generates a lot of heat and sometimes fire. Any debris caught in the manhole will worsen the fire. And if things explode, those heavy manhole covers go flying.
To prevent problems like this, manholes should be inspected and cleaned of all debris. But since there are always a lot of other tasks to do—and, frankly, no one likes to inspect and clean manholes—this work often takes a backseat.
Read full article here.