ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
ShoutChat Box
Recent Posts
Southwire Recalls Electrical Outlet Boxes
by Admin - 08/21/19 06:39 PM
Fuse blower plug?
by HotLine1 - 08/20/19 01:50 PM
100 year old Light Bulb
by HotLine1 - 08/20/19 01:26 PM
Forum Updates Coming Soon.
by Admin - 08/18/19 01:55 PM
Anybody Remember this?
by Bill Addiss - 08/17/19 09:07 PM
New in the Gallery:
What is this for?
Plug terminals
Who's Online Now
0 registered members (), 36 guests, and 8 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate Thread
Motion detectors and dimmers #219649 09/20/18 02:24 PM
Joined: Jul 2004
Posts: 9,382
G
gfretwell Online Content OP
Member
Have you guys had problems with dimmers on motion detectors (dimmer in the load path). The lights don't even glow.
I can make the dimmer work and I can make the motion detector work but not together. I have tried 4 different types of dimmer and 2 motion detectors. The MD is turning on and I see 120 at the dimmer, it just does not put out. I swapped in and out on the dimmer. Still no joy. They are light bulbs Tom Edison would recognize so that isn't it.


Greg Fretwell
Work Gear for Electricians and the Trades
Re: Motion detectors and dimmers [Re: gfretwell] #219650 09/20/18 02:52 PM
Joined: Dec 2002
Posts: 198
G
geoff in UK Offline
Member
I'm guessing your motion detector has a solid state relay type output.
Both devices are probably designed to work with a sinusoidal input and a resistive load.
The MD won't "see" a load when it tries to switch on, and /or the dimmer won't see an appropriate supply to trigger its electronics.

Perhaps a motion detector with an old fashioned mechanical relay would solve your problem.

I've not tried your setup, but the incompatibility of some dimmers with some led or cfl lights is well known and similar

Re: Motion detectors and dimmers [Re: gfretwell] #219651 09/20/18 04:02 PM
Joined: Jul 2004
Posts: 9,382
G
gfretwell Online Content OP
Member
I wired a bulb in directly to the MD and everything seems to work. Thanks. I really thought these Heith dimmers were relay output tho. The others I have click. I guess this is just progress.


Greg Fretwell

Featured:

2017 Master Electrician Exam Preparation Combos
2017 NEC Electrician
Exam Prep Combos:
Master / Journeyman

 

Member Spotlight
richard
richard
L.I. New York
Posts: 99
Joined: August 2003
Show All Member Profiles 
Top Posters(30 Days)
Admin 23
GeneSF 8
Popular Topics(Views)
257,894 Are you busy
193,629 Re: Forum
183,252 Need opinion
Powered by UBB.threads™ PHP Forum Software 7.7.3