The Tool Barn


Examine the Existing Box

The box in the ceiling must be able to support the weight of the new fixture.  Chances are that if it was a small fixture like the one shown in the pictures you will have to remove it and replace it with a stronger model.  If you have access to the space above the room, go up there and examine the box.  If the box is anchored to the rafters by four metal "legs", you're in good shape.  If it is a simple box nailed to the rafter, you'll have to replace it.

There are two different scenarios for replacing the box.  If you have access to the area above the ceiling, you can purchase a box like the one here or mount a piece of wood between the rafters and then affix a metal box to it.  Both of these are shown in the pictures to the right.  The box pictured at right is not the only solution, there are at least four different kinds of spreaders (the metal legs) that you might encounter.  All of them work via the same principle.  You spread the legs to fit between the rafters and then affix them using a screw or nail.  Screws are recommended as they are les likely to disturb the drywall which normally hangs from the rafters.  Whether or not you choose to hang the box from a piece of wood or use the prefabricated box, you'll also have to make sure that you position the box correctly.  Make sure not to hang it too close to the ceiling or the box will protrude through the ceiling.

If you don't have access to the area above the ceiling then you will have to purchase a different kind of box.  This kind of box uses a spreader that has a nut in the middle that turns and forces the spikes on the legs into the rafters.  This kind of installation is trickier than the others but still fairly simple.  When you have secured the legs against the rafters there is usually a U-bolt that goes over the legs from which the box hangs.  Just as above, make sure that you hang the box flush with the ceiling or it will show and these boxes don't come in decorator patterns.

After the box is mounted in place, route the wires through the box (make sure you use a cable clamp to protect the cable where it comes into the box).

Junction box exposed

Junction box exposed

Ceiling box with hanger

Ceiling box with hanger

View from attic of reinforcement board used to secure junction box

View from attic of reinforcement board used to secure junction box


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