Dimmer switch wiring help


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Old 11-22-16, 06:52 PM
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Dimmer switch wiring help

Hi all,

Trying to install a new dimmer switch for a bank of flourescent lights (6x4' Tubes).

The dimmer I am trying to install is a part of a three switch box:
1 - Light Switch
1 - Dimmer
1 - Outlet Switch

The problem I am having is figuring out which wires are what. Connected to the old dimmer switch is 2 blacks, 1 red, 2 twisted white/gray.

I bought a few dimmer switches trying to wire them up, but in whatever configuration, either the breaker blows or nothing.

Was just wondering if you guys have any insight on possible wiring.

Thanks
 
  #2  
Old 11-22-16, 07:18 PM
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Standard dimmer switches, even those for CFL will not usually work on fluorescent "tube" lights. If you have a 3-conductor cable, red, black, white to the old dimmer then you have a dimable ballast and require a custom ballast and custom dimmer made for the ballast.
See a larger diagram and explanation at: https://www.google.com/url?sa=t&rct=...qO17GFcyaXSFAA

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Source: https://www.google.com/url?sa=t&rct=...qO17GFcyaXSFAA
 

Last edited by ray2047; 11-22-16 at 07:50 PM.
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Old 11-22-16, 07:58 PM
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If you still have the old one.... post the model number of it.
 
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Old 11-23-16, 05:59 AM
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Connected to the old dimmer switch is 2 blacks, 1 red, 2 twisted white/gray.
As a test, disconnect the dimmer. Keep the white/gray twisted.
Connect the 2 black and 1 red together and see if the lights come on.
 
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Old 11-23-16, 01:09 PM
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The old dimmer is an LC5F Flourescent Dimmer - 2~10 40W RS Lamps, 4. 16A, 120V 60Hz, Max

@Handyone, I have tried that and no lights.

Again appreciate the input.
 
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Old 11-23-16, 01:24 PM
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Fluorescent dimmers are a dying breed. I'm afraid your going to need to stay with your Prescolite dimmer. I see a few available on eBay.

Prescolite Lc5f-3p 3-way Fluorescent Dimmer for 10 40w Rapid Start Lamps | eBay
 
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Old 11-23-16, 01:32 PM
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Yea I was afraid so since I couldn't really find much info on the LC5F.

TBH, I really don't need the dimming capability, can I wire up a regular fluorescent light switch with the current wiring?
 
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Old 11-23-16, 02:06 PM
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can I wire up a regular fluorescent light switch with the current wiring?
You'd probably need to change the ballast to a non dimable ballast or switch to LED tubes and remove the existing ballast. (No such thing as a regular fluorescent light switch. A standard switch is used with non dimable ballasts.)
 
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Old 12-04-16, 11:12 PM
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Hmmm, so I have been looking around for that dimmer, but nobody has it in stock anymore. I tried purchasing it from the linked ebay sale, but they said "they couldn't find it"

So do I have any other options than replacing ballast and tubes?

Thanks again for everyone's input.
 
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Old 12-05-16, 09:09 AM
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Can you post the model number of one of the ballasts ?
 
 

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