I have 3 romex lines (black and white)coming into switch box.

  • Recessed lights
  • Fan
  • Power from breaker

If I want 1 dimmer switch how do i connect?

  • Fans can't be dimmed. Using a dimmer on a fan can set it on fire. – Harper - Reinstate Monica Jul 8 '18 at 13:09
  • 1
    Even if a dimmer could be used for the fan, the results wouldn’t equal your expectation. – Tyson Jul 8 '18 at 13:59
  • I'm not suite why you would want one dimmer switch. Then you couldn't have bright light for reading + low fan speed so papers don't blow around the room or low light for watching TV + high fan speed for comfort on a hot day. – manassehkatz-Moving 2 Codidact Jul 8 '18 at 14:44

You'll need a special sort of dimmer for this

What you need for this job isn't an ordinary dimmer switch, it's a combination dimmer/fan speed controller. Fortunately, this isn't too rare a product (most of the major lighting controls manufacturers make them).

Once you have one (get one that's a self-contained unit vs. one that needs a module in the fan base), simply wire it as per the instructions, and you should have speed control of the fan and dimmed lights at that point. (If you get stuck, ask another question here, specifying the make and model of the fan controller in question.)

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