Electrical – Which wires do I connect to the new ceiling fan

ceilingceiling-fanelectricaljunction-boxwiring

I looked all over the internet and my outlet box seems to have unorthodox wiring/ colors.

On the ceiling outlet box I have 3 thick wires, red, white and green, and a fourth single little wire that is orange.

On the ceiling fan there is motor, light and neutral wire. There is also a little green wire connected to the mount which I think is the ground wire.

What connects to what?

I would like to add that this condo building is about 8 years old. So it's fairly new.

Best Answer

What was there before? By the colors you describe, I suspect there was a hard wired smoke detector there, the smaller orange wire is daisy chained to all detectors so if one detects smoke/Co/extreme heat, all detectors go into alarm mode. If you removed a smoke detector, you have violated local codes!