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Strange behavior of dimmer switch
Just installed a replacement dimmer switch that exhibits the same
strange behavior as the previous one. It's on a circuit that's wired correctly. I have a dedicated outlet running a string of low-voltage halogen lights through a transformer. When I installed the first dimmer, it worked fine. When I checked it with my handy-dandy circuit checker (you know, the type with the 3 leds), it indicated the circuit was OK with the power applied. BUT: when the dimmer was switched off, the tester indicated a fault ("open neutral", it said). So I replaced the dimmer temporarily with a single-pole switch; circuit acted normally with power on and off. Then I replaced the dimmer (it's a Lutron "decora"-style with the big rocker switch on front and a little slider doohickey). Guess what? Same deal; tester says "OK" when on but "open neutral" when off. What gives? All I can think is that the dimmer is drawing just enough current when in the "off" position to spook the tester. (Yeah, I know those types of testers aren't 100% conclusive, but shoot, it's better than sticking your fingers on the damn wires.) Why this would be the case, I have no idea. Although, I just realized: the dimmer packaging says "locator light" on it; is there a dim light on this that is drawing this current? (I'm not at my client's site right now.) D "puzzled" N -- Just as McDonald's is where you go when you're hungry but don't really care about the quality of your food, Wikipedia is where you go when you're curious but don't really care about the quality of your knowledge. - Matthew White's WikiWatch (http://users.erols.com/mwhite28/wikiwoo.htm) |
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