I finally figured out why my keypads kept glitching on bigger jobs

Been installing for about 8 years and last month a customer in Austin showed me his old panel had a grounding issue I'd been missing on multi-zone setups... anyone else run into this with 6160 keypads causing ghost zones?

2 comments

2 Comments

danielb4318d ago

I was out on a job last year in San Antonio where a guy had three 6160s daisy-chained and the far one kept throwing random zone 7 faults. Spent two hours chasing wires before I noticed the ground screw on his main panel was barely snugged down to the can, which is funny because in my own life I've noticed the same kind of thing with loose connections. Like how my truck's tail light started flickering and I kept checking the bulb, but it was just a corroded ground strap on the frame. You fix the little foundation stuff and the whole system settles down. Ground loops are the gremlins that hide in plain sight.

kimreed18d ago

You mentioned "ground loops" but that's actually not quite what you were dealing with. A ground loop is when you have multiple paths to ground at different potentials, which causes a current to flow through the shield or ground wire. What you described sounds more like a simple poor ground connection, not a loop. The loose screw on the main panel just meant the far panel didn't have a solid reference to earth ground. That's a common issue I've seen in older homes where panels get daisy-chained without proper bonding. The random zone faults make total sense once you realize the ground reference was floating around. Your truck tail light story is a perfect example of the same kind of thing - a single bad connection at the frame, not a loop between two different grounds.