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PostPosted: Fri Oct 21, 2016 2:09 pm 
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Elite

Joined: Mon Nov 16, 2009 9:06 am
Posts: 1093
Location: Trenton, Michigan
In my laundry room on the first floor the ceiling florescent lights never seem to last more than 4 years. So this time I decided to replace it with an LED fixture. Not a hard thing to do.

Since it was not working and it is a double switch control, I used a simple neon bulb test light to confirm the power was truly off. It seemed when "off" there was still a dim glow. Then I got a multi meter to measure the voltage and am seeing 44 volts when it is off.

Any ideas?

The ceiling light is hooked up to be controlled by two different wall switches. One of the switches has a "night light" in the rocking wall switch for when it is "off", but it is not working now that the overhead light is disconnected.

Steve.


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PostPosted: Fri Oct 21, 2016 3:28 pm 
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Elite

Joined: Tue Dec 06, 2011 5:04 pm
Posts: 1344
Location: Ann Arbor
This may not be the right answer, but if one of the switches has a light in it or is illuminated then there will be a current through it. Not sure about the 44v, but I've gotten tickled thinking the switch was off and it wasn't!

But while we're on the subject....I bought some LED lights at Costco the other day, the ones that look like Edison bulbs. I put two in the garage door opener and they won't work. When I replaced them with incandescent, they work, so I know there's power. I can't imagine it's got to do with the socket, but I've never seen anything like this. Anyone got a suggestion?

Jay


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PostPosted: Fri Oct 21, 2016 3:50 pm 
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Elite
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Joined: Fri Aug 05, 2011 4:17 pm
Posts: 966
Location: Farmington Hills
Did you have to discount the light ballast I think they capacitors and keep a small charge.


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PostPosted: Fri Oct 21, 2016 4:40 pm 
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Elite

Joined: Tue Oct 27, 2009 9:14 am
Posts: 1358
Leakage current through the neon light in switch. It's not on because it is wired to be in series with the load when switch is off, thus completing the circuit. When you measure with millimeter the meter is high impedance, not enough load to illuminate the neon light.
Shut off the breaker feeding the circuit, YOU are low impedance, you will get knocked on your butt as the low impedance load will cause the neon light to glow.


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PostPosted: Sun Oct 23, 2016 10:55 am 
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Elite

Joined: Mon Nov 16, 2009 9:06 am
Posts: 1093
Location: Trenton, Michigan
Shut off the breaker, replaced the fixture, powered back up and works fine.

Steve.


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PostPosted: Sun Oct 23, 2016 3:06 pm 
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Elite
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Joined: Sat Feb 28, 2004 10:12 am
Posts: 772
Location: Brownstown,Mi.
SteveStram wrote:
Shut off the breaker, replaced the fixture, powered back up and works fine.

Steve.


Shut off the breaker :s_thumbsup Always assume its HOT (live) ...
I was pulling a oven burner element, oven was off, as I pulled it out, it touched
the side and shorted out. SAFETY FIRST turn off the breaker..
Wid T

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Seen it all, done it all. Can't remember most of it .


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PostPosted: Sun Oct 23, 2016 7:24 pm 
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Master

Joined: Sun Feb 05, 2012 10:04 am
Posts: 299
Location: Farmington Hills, MI
Many years ago in our last house I was working on a circuit in the basement and had turned off the breaker, checked the outlet and it still read hot?? Figured I must have thrown the wrong breaker so checked it again...hmm, it's the correct one. Cycled the breaker again to off and rechecked the outlet...still hot. Pulled the front panel off the box and found that the particular breaker had been damaged on installation such that it was still conducting no matter which position the switch was in. Went to the hardware store (this was before the BORG) and got a replacement breaker to fix the issue. Always check the circuit before commencing work even if you KNOW it is off!

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PostPosted: Mon Dec 19, 2016 9:40 pm 
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Elite
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Joined: Sun Mar 08, 2009 8:00 pm
Posts: 820
Location: The Hartland of Michigan
Jay Houghton wrote:
But while we're on the subject....I bought some LED lights at Costco the other day, the ones that look like Edison bulbs. I put two in the garage door opener and they won't work. When I replaced them with incandescent, they work, so I know there's power. I can't imagine it's got to do with the socket, but I've never seen anything like this. Anyone got a suggestion?

Jay

Dragging this one back up.
There is a thread on SMC about LED lights in garage door openers. They have a tendency to interfere with the operation of the opener.
http://www.sawmillcreek.org/showthread. ... ost2632800

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PostPosted: Mon Dec 19, 2016 11:05 pm 
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Master

Joined: Sun Feb 05, 2012 10:04 am
Posts: 299
Location: Farmington Hills, MI
I replaced the incandescents in my 30ish year old Crafstman opener with LEDs...nothing fancy just bulb shaped LEDs equivalent to 60W incandescents and it works fine.

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Kevin (Specialist in reconstituting the wood after a wayward toolpath)


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