Most building codes require ceiling fans to be mounted on special fan rated boxes which are made of metal or strong plastic and have deep threaded holes for the mounting screws.
Install ceiling light without outlet box.
In some cases a ceiling outlet is installed to plug in the cord for a hanging light.
Place the back of the box on the wall or ceiling and adjust it straight and level.
Or other heavy light fixture in an existing ceiling requires.
Cut along the trace line with a drywall saw and remove the cutout.
Getting the wiring ready mark and cut the holes for the electrical boxes but don t install the boxes until the wires are run.
Standard electrical boxes used for wall outlets are installed for ceiling outlets in garages sheds and workshops.
Or if a fixture meets all of the criteria of a box but lacks a cable clamp don t use it without a box.
The box must be mounted firmly either by attaching it directly to a framing member or by using a fan rated brace.
Installing a remodeling box is something you can easily do with just a few.
Installing a ceiling fan chandelier or other heavy light fixture in an existing ceiling requires the right junction box j box.
In contrast to new work boxes which are screwed to the wall studs before drywall is hung old work boxes hang on the drywall with clamps built in to the box.
For example if you have a light fixture that doesn t need a box for mounting but the wiring connections are not protected by some kind of cover then you can t use the fixture without a junction box.
An easy solution is to install a fan brace box available from home centers and hardware stores that s designed to be installed without cutting any additional holes in your ceiling.
For example you would install a remodeling box if you need an additional outlet for a home office or theater.
If you have an old light fixture that is not attached to the wall or ceiling with a junction box you should repair the light fixture by removing it installing a junction box and installing a new fixture.
Light fixtures that simply protrude from the ceiling or wall without a junction box are a fire waiting to happen.
If your light fixture weighs more than 50 lbs it has to be supported independent of the electrical box.
Trace the outline of the back of the box on the drywall using a pencil.