Leave the green or copper wire thats coming out the ceiling unattached for now. Typically a green wire is attached to your fan bracket and the other green wire is attached to the fan itself.

Wiring Diagram Fan Light Source At The Fixture Ceiling Fan
What size wire for a ceiling fan. Other options would be. Black wire is for the fan. Green wire is for the ground. If you had a red wire coming from your ceiling it is hooked up to your wall switch. Rooms up to 75 sq ft 29 in 36 in. The blue wire is the hot wire for the ceiling fan light fixture.
To get the most out of a ceiling fan you must first select the right size. First thing you want to do is make sure that you have the proper gauge wire running to the bathroom fan. The ceiling fan motor does not have a ground wire. Although you can get just a ceiling fan most units offer a light kit that can be added in the future. White wire is neutral. I will be going over the circuits required for all of the options mentioned.
Downrods or ceiling fan mounting rods allow a ceiling fan to be mounted on either a vaulted or flat ceiling and are available up to 72 inches long. For a large room of 15x15 or more choose a ceiling fan with a blade span of 52 56 or 60 inches. Identify and tag that circuit at the panel and replace the 20amp circuit breaker with a 15 amp then you may extend the circuit with 14 gauge wire. Energy star makes the following recommendations for ceiling fan diameter. There are several on the market from 2 tools that are simple stripping devices to fancier wire strippers that have cutouts for 102 122 and 142 cable. Please visit our what size downrod do i need.
And today im going to talk to you about how to wire a ceiling fan for a bath. Find the short green wire or the green ground screw on your ceiling fan hanging. Guide to determine what length downrod you need based on your ceiling height. Twist the copper ends of the wires together to connect them together. Blue wire is for the light if light is included with the fan. In order to be code compliant for the project you should maintain the 12 gauge wire.
Most common fans either come with a light or without a light. Red wire is sometimes included and acts as a conductor to carry power to the light kit. As a general rule you can start with the recommended fan for a given room size as follows. To wire a ceiling fan we first have to know the options available on the fan. They almost never have a metal inner winding and are commonly undersized which makes them difficult to use if not unsafe. For a 12x12 room go with 44 to 48 inches of blade span and for small rooms of 8x8 or so a blade span of 36 inches should do the trick.
Never use the included wire nuts that come with ceiling fans.