How to Retrofit a Ceiling Fan Electrical Box
Use a fan-rated outlet box that will support the fan's weight and its motion. Look for the label to be sure.
Before installing a ceiling fan, make sure that you follow the portion of the electrical code that requires that you use a fan-rated outlet box that will support the extra weight and the motion associated with a fan. A fan-rated box will be labeled as such inside and typically can support up to 70 lb.
|A 1⁄2-in.-deep pancake box is meant to be screwed to a joist or block. It’s used if only one cable is coming into the box.|
|A 2-1⁄4-in.-deep box can be attached to blocking between joists and is roomy enough to handle more than one cable. It is also available in a saddle-mount configuration.|
No blocking, no problem
|Paired with a deep box, this hanger is meant to span between two joists and takes the place of wooden blocking.|
This tutorial is an excerpt from the following article:
With common-sense wiring and the right hardware, you can replace an existing light fixture with a breeze in almost any room in the house
Fan-rated outlet boxes support the extra weight and motion associated with a fan.