I have a Shelly +1 which is connected at a light fixture in a bathroom. The related wall switch is set to edge so that turn the wall switch on or off or remotely the lights can be controlled. It is an older home with cloth insulation over some rudimentary black material coating the wires which cracks when bent. Whenever I work on any of this wiring in each electrical box I place plastic tubing over each wire and then heat it the shrink it for better insulation. In any event, from time to time the lights flicker like crazy, which is disconcerting to someone in the shower, especially with soap in their hair! (WAF = -10,000) I have rewired and replaced the Shelly but the problem still came back. I’m now replacing the wall switch. Is there any other reason why I would flicker like crazy that I might not be taking into account? The wall switch has a breaker in it and is also connected to a couple of outlets in the same electrical box. They all have breakers on the front and are GFCI per required code.
Anyone have thoughts and why this flickering would be taking place or is this indicative of those kinds of wall switches when they start to fail after 25 years?
I guess I was really ust asking if that is something that would make a Shelly switch on and off very quickly, and if anyone else has noticed same. (Doing a rewire by the way.)
I think the +1 looks for spikes on AC Line to instigate switch. Is that line connected to a noisy dimmer, ac motor, battery-inverters, etc. Can you determine if it’s random or mostly daylight, night-time, oil heat turns on. etc. (good luck)
Resolved: the Shelly switches on and off very quickly when it is exposed to humidity beyond the spec… I simply put some desiccant packets (like those you see in some vitamin or medicine bottles) into a Ziploc sandwich bag, put the Shelly into the bag, closed the Ziploc as much as possible so all the wires were just sticking out of one corner, then sealed that corner with a bunch of electrical tape (and then added waterproof silicone adhesive to the end so no air can get in even between the wires. Works like a charm now with no issue:
Three times I ran the shower with hot water for nearly an hour (until we ran out of hot water) as a test. The room was literally drenched but the good old Shelly just kept working perfectly.
I had 2 electricians checking everything and they were here for 4 hours. This Shelly +1 is UL listed as well, and they checked how it was installed so there is no issue or reason for concern.