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#192748 - 03/01/10 08:07 PM Cree LED 4" lights- phantom downstream voltage  
Haligan  Offline
Member
Joined: Feb 2004
Posts: 111
Berkeley, CA USA
Connected 2 Cree 4" LED cans to dedicated circuit. Powered on, checked placement and operation. Switch off, breaker off.
Come back almost an hour later. Test with voltage pen to make sure no one warmed anything up while I was away. Surprise- there's voltage. Woah.

I put the meter on the hot and neutral of the lights and there is a steady 63v trickling back down from the two lights.

I then disconnected hot, neut, and gnd from circuit. Nothing but the two LED cans.
Still the 63 phantom volts.

What's happening here? It sounds like capacitance draining backwards.

I didn't think to put the ammeter on there.


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#192749 - 03/01/10 08:44 PM Re: Cree LED 4" lights- phantom downstream voltage [Re: Haligan]  
Tesla  Offline
Member
Joined: Jun 2004
Posts: 1,273
Sacramento, CA
Use analog meter...

Voltage will disappear.



Tesla

#192750 - 03/01/10 08:52 PM Re: Cree LED 4" lights- phantom downstream voltage [Re: Tesla]  
Haligan  Offline
Member
Joined: Feb 2004
Posts: 111
Berkeley, CA USA
I had no idea. Too much trust in all things digital.



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