Why does nobody talk about shielded cable degradation in warm hoistways?

For years, I've been battling sporadic communication dropouts between the car controller and the machine room in routine checks. It wasn't just annoying, it added hours to jobs because we'd be chasing ghosts, re-terminating connections that seemed fine. The real kicker was how it only happened under specific load conditions, which made replicating the fault a nightmare. After countless service calls, I started logging every variable: temperature, humidity, even the time of day. Turns out, a particular batch of shielded cable from a few years back has insulation that degrades faster near heat sources, like the motor. By mapping out where those cables were installed and proactively replacing them in slow periods, I've cut those troubleshooting marathons in half. It's not glamorous, but finally having a repeatable fix for something that felt random is a huge weight off. Sharing this here in case anyone else is pulling their hair out over similar gremlins.

2 comments

2 Comments

the_jordan59m ago

Man, this is such a classic case of the hidden costs in built environments. We're surrounded by systems failing slowly from cheap materials, and it's always the techs who have to detective their way through the mess. Makes you wonder what other time bombs are ticking away in plain sight.

the_ben1h ago

Ever notice how the most elusive faults always seem to tie back to something you installed years ago and forgot about? I spent a week once convinced a PLC was possessed, only to find a similar batch of cable had turned brittle behind a conduit clamp. Your method of logging variables is smarter than my approach, which mostly involved a series of increasingly creative curses. It's always the unglamorous fixes that save the most sanity, even if they make you feel a bit silly for not spotting them sooner.