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Old 12-05-2012, 04:12 PM  
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Default Dimmer outputs voltage when turned off

I have a weird "problem". I installed dimmers (decora diva), and when they're turned off I get a voltage of 57.7V to ground. The light does shut off completely. When I turn it on, the light turns on, aswell as dims. It functions properly, just get a voltage when its turned off. It scared a carpenter on the jobsite .
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Old 12-05-2012, 05:00 PM  
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Originally Posted by jclarmo View Post
I have a weird "problem". I installed dimmers (decora diva), and when they're turned off I get a voltage of 57.7V to ground. The light does shut off completely. When I turn it on, the light turns on, aswell as dims. It functions properly, just get a voltage when its turned off. It scared a carpenter on the jobsite .
What are you using to measure this voltage with?

A digital multi-meter or similar high impedance tester?

Use a solenoid tester or low impedance DMM and see what you get.
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Old 12-05-2012, 05:02 PM  
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Also, when you say it scared a carpenter, how do you mean?

Did he get bit, or did he just see your readings on the meter?

Just trying to determine if this is real or phantom voltage.
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Old 12-05-2012, 05:11 PM  
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Phantom voltage. Probably using a high impedance DMM.
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Old 12-05-2012, 05:11 PM  
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It's leakage current through the triacs. It's normal on solid state dimmers.

-John
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Old 12-05-2012, 05:41 PM  
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You will not read it with a Wiggy or an old Simpson meter, guaranteed.
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Old 12-05-2012, 06:12 PM  
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It's leakage current through the triacs. It's normal on solid state dimmers.

-John
OP states Diva. In the off position they should be air gap open, no leakage.
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Old 12-05-2012, 07:01 PM  
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I was using a digital multimeter. The carpenter had a proximity voltage tester.
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Old 12-05-2012, 09:21 PM  
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A diva has a backlight in it. There is a small lamp in parallel with the switch. When the switch is off it uses the load to complete the circuit. This is whatyou are reading. To test this shade the switch and install a fixture at the ceiling. In the off position the switch will be illuminated. Remove all of the lamps in the fixture and the illumination goes away.
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