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replacing dimmer need help (wall has 2 wires, dimmer has 3+ground)!

replacing dimmer need help (wall has 2 wires, dimmer has 3+ground)!


Old 04-26-14, 11:23 PM
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Unhappy replacing dimmer need help (wall has 2 wires, dimmer has 3+ground)!

the wall has

1 Black
1 Red
when I use a electrical detector the black one is the hot one

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my dimmer has
1 red, 1 black, 1 white, 1 green (ground)
RF9537-NAW 1000W Electronic Low Voltage (ELV)
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I tried connected in any combination but no go.

I thought maybe I need an accessory type of dimmer so I used this
1 black, 1 white, 1 green (ground)

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still no go... what am I missing?
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Old 04-27-14, 12:29 AM
PJmax's Avatar
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The first dimmer requires a neutral to operate.
The second unit appears to be the remote for the first dimmer.... probably for 3 way applications.

You are showing us a junction box with a red and black wire only. I don't see any other wires in the box. That tells me that you have a metal conduit system and just a switch leg there with no neutral. You may be able to locate the other end of that conduit and pull a neutral to that point.
Old 04-27-14, 02:04 PM
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what am I missing?
A grounded conductor, aka a neutral wire, in your switch box. If you want to keep that dimmer and you have wiring run in conduit, you can pull a neutral to there, as PJ suggested. If you don't really care what dimmer you use, you can return the two dimmers you have now and buy an ordinary dimmer that doesn't require a neutral.

Two questions:
  1. Does that dimmer have a special feature that you want to have that requires a neutral connection? Does it light up or something?
  2. What type of lamps (light bulbs) will be controlled by the dimmer?

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