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Old 03-08-2006, 01:51 PM   #1
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Low Voltage Light Switches...40 year old house


I have been surfing the web and stumbled upon this website. I hope to post and check it often! Anyway, Has anyone encountered a 40 year old house with a low voltage system for the overhead lighting? All of my light switches are marked only with "3A 25V" and "Made in the U.S.A.". Does anyone know if these can be replaced (mine are in need of repair. Also, how does this system work and WHY was it ever used!? Any thoughts....Anyone???

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Old 03-08-2006, 06:51 PM   #2
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Low Voltage Light Switches...40 year old house


There is a master control box somewhere for this system. Those low voltage switches turn on relays in the master controller that actually turn on the lights. It was a early version of the computerized system you see now that allow control of any light from anywhere in the house.

The problem may not be the switch. It could be the relay in the master control box.

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Old 03-08-2006, 11:41 PM   #3
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Low Voltage Light Switches...40 year old house


There is no problem with the system except for the discoloration of the relay switches and wall plates. Only one switch is currently bad and I know this because I can see that its broken. I know where the master control box is now (Remember seeing it in the attic when I re did the insulation). Does anyone know where you can buy these switches and wall plates? Also, does anyone know if their are any hazards with this type of system? Thanks for the quick response!
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Old 03-08-2006, 11:48 PM   #4
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Low Voltage Light Switches...40 year old house


Also, any websites that discuss this type of system would be excellent also, since I have not been able to find out any information on them so far.
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Old 03-09-2006, 07:56 AM   #5
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Low Voltage Light Switches...40 year old house


most of the switches ive seen like this are made by lutron. Try their website or find a electrical supplier in your area who deals with lutron. good luck
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Old 11-13-2007, 06:33 PM   #6
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Low Voltage Light Switches...40 year old house


I have the same system. It's kinda wacky. Have you found the switch covers for it?

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Old 02-11-2008, 04:09 PM   #7
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Low Voltage Light Switches...40 year old house


I have not found anything on these switches. Thank God nothing has gone wrong with these switches or master control box yet! I would just like to replace these switches and make them the room look nicer. The switches are all brown and do not match the current look of the house.
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Old 02-11-2008, 04:32 PM   #8
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Low Voltage Light Switches...40 year old house


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Originally Posted by derekspudich View Post
I have not found anything on these switches. Thank god nothing has gone wrong with these switches or master control box yet! I would just like to replace these switches and make them the room look nicer. The switches are all brown and do not match the current look of the house.
How many terminals does the existing switch have? Can the relay be operated by touching the wires togther that go to the switch?

If it is just two wires, then any single pole switch with at least the rating you stated should work.

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Old 02-11-2008, 04:45 PM   #9
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Low Voltage Light Switches...40 year old house


You can check out this site, http://www.touchplate.com/ they were very popular in the day...

Here is a catalog, see if the switches look like yours...
http://www.touchplate.com/cutsheets/...07_low_res.pdf

Last edited by chris75; 02-11-2008 at 04:49 PM.
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Old 02-11-2008, 08:37 PM   #10
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Low Voltage Light Switches...40 year old house


Here is what your master control box will look like....probably in the attic.




Good luck
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Old 02-11-2008, 11:04 PM   #11
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Low Voltage Light Switches...40 year old house


220, oh that's just evil. It MAY look like this:


Just kidding. This is an IBM lighting control unit from the 50's 220's image is the real deal, albeit a bit 'done up' shall we say?
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Old 12-27-2008, 02:42 PM   #12
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Low Voltage Light Switches...40 year old house


Just stumbled upon this forum and this thread. A friend called me the other day, he has a low voltage system, and all the lights in the house are on, switches won't work. Does anyone know how to fix this?
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Old 12-27-2008, 04:52 PM   #13
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Low Voltage Light Switches...40 year old house


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Originally Posted by derekspudich View Post
Thank god nothing has gone wrong with these switches or master control box yet!
I would just like to replace these switches and make them the room look nicer.
You post schematic for master control, we fix if necessary.

Any wall switches should work to replace these 3A, 25v spec'd switches.

Those posted photos are probably from the hyperdrive control for the Enterprise.
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Old 12-27-2008, 05:18 PM   #14
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Low Voltage Light Switches...40 year old house


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Originally Posted by rddrappo View Post
Just stumbled upon this forum and this thread. A friend called me the other day, he has a low voltage system, and all the lights in the house are on, switches won't work. Does anyone know how to fix this?

One of the buttons is probably stuck. They do that once they get old.
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Old 12-27-2008, 08:49 PM   #15
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Low Voltage Light Switches...40 year old house


Problem solved. Turns out my buddy installed a regular decora rocker for his garbage disposal, and the switch was left on and the disposal unplugged. The switch was feeding constant power to the relay, just as a stuck switch would do. I turned it off, and everything works fine now. I got the satisfaction of telling him how easy a fix it was, and that he's slept with the lights on for two days for no reason! Thanks for your quick response, I appreciate it.

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