ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals

ECN Shout Chat
Top Posters(30 Days)
Admin 16
Recent Posts
Another Forum Update
by Admin. 03/22/17 03:04 PM
Dining room plugs
by watersparkfalls. 03/21/17 10:31 PM
TRUE POWER
by jraef. 03/21/17 09:13 PM
WEG CFW-11 Frequency Inverter
by jraef. 03/21/17 08:50 PM
fuse rejectors
by HotLine1. 03/20/17 08:14 PM
New in the Gallery:
SE cable question
Popular Topics(Views)
231,196 Are you busy
165,927 Re: Forum
160,458 Need opinion
Who's Online Now
0 registered members (), 46 guests, and 11 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate This Thread
#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.


Work Gear for Electricians and the Trades

#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.



Member Spotlight
Scott35
Scott35
Anaheim, CA. USA
Posts: 2,707
Joined: October 2000
Show All Member Profiles 
Featured:

2017 NEC and Related
2017 NEC
Now Available!

Shout Box
Powered by UBB.threads™ PHP Forum Software 7.6.0
Page Time: 0.010s Queries: 15 (0.003s) Memory: 0.7492 MB (Peak: 0.8729 MB) Zlib enabled. Server Time: 2017-03-23 10:17:49 UTC