How to Mount a Ceiling Fan to a Plastic Outlet Box

To mount a ceiling fan to a plastic box is possible if the fan is not too heavy for the box.

How to Mount a Ceiling Fan to a Plastic Outlet Box

The box must be reinforced to handle the weight and vibration of the fan. A wood brace will need to be added behind the box to give the necessary strength to the box. Access to the attic or ceiling area behind the box will be needed. .

Step 1

Measure the distance between the existing ceiling joists. Use that measurement to mark and cut a 2 inch by 4 inch board to fit snugly between the existing joists and behind the plastic box.

Step 2

Use the hammer and nails to place the 2 inch X 4 inch board behind the box for support. Nail it securely on both ends to the existing ceiling joist. Avoid damaging any existing electrical wires during installation.

Step 3

Use the screw driver and several screws to attach the plastic box to the wood piece behind it.

Step 4

Attach the ceiling fan mounting bracket to the plastic box.

Step 5

Attach the ceiling fan parts below the mounting bracket and make the wire connections as shown on the fan’s installation instructions provided by the manufacturer.

Things You Will Need

  • Hammer
  • Nails
  • Screws
  • Screw driver
  • 2” X 4” board
  • Circular saw
  • Tape measure
  • Pencil


  • If access behind the box is not possible, replace the plastic box with a metal box and hanging bracket.
  • Check the manufacturers weight restrictions for plastic box use with ceiling fans.


  • Always take safety precautions and wear proper safety equipment while using hand tools and working with electricity.
  • Hang only small, light weight fans to plastic boxes. A fan falling from the ceiling can cause serious injury or even death.


About the Author

Ed English began his writing career with his first book titled "SCUBA Diving A Newcomer's Point of View" published in 2005. English has owned businesses for over 25 years; he holds several certifications from the National Cable Television Institute, Professional Association of Diving Instructors, American Sailing Association and a Home Inspector Certification.