Not all fixtures need to be attached to a wall stud or joist.
Lightweight fixtures can hold up on plaster or drywall if you have a remodel electrical box.
Try your hand at this small electrical project using our step-by-step instructions below.
Credit: Edmund Barr
However, they are only as strong as the wall surface to which they are clamped.
Select boxes that meet local codes.
Before cutting a hole,use a stud finderto double-check no joist or stud is in the way.
Credit: Dave Toht
With a utility knife cut the line deeply enough to cut through the drywall paper.
Cut Hole
Cut the hole with a drywall saw.
Cut to the inside of the knife cut to prevent fraying the paper.
Credit: Dave Toht
Test to confirm the old-work box fits in the hole.
Thread Cables
Run cable through the hole.
Strip 8 to 12 inches of sheathing and launch the cable into the box.
Credit: Dave Toht
Whichever clamping method the box uses, 12-inch of sheathing should show inside the box.
Tug to check that the cable clamps tightly.
Insert Box
Push the box into the hole.
Credit: Dave Toht
If it fits tightly, do not force it or you may damage the drywall.
If needed, use a utility knife to enlarge the hole in your wall.
Tighten the screw until you feel resistance and the box is firmly attached.
Credit: Dave Toht
What If the Wall Is Made with Plaster?
Take your time cutting alath-and-plaster wallwhen installing an electrical box.
It’s easy to damage the surrounding area.
Credit: Dave Toht
Most plaster is attached to 38-inch-thick wood lath, which cuts fairly easily if it does not vibrate.
If it does vibrate as you saw, sections of plaster can loosen from the lath.
It is difficult to make a neat hole in plaster and lath, so have patching plaster on hand.
Credit: Dave Toht
Make several passes with a sharp knife.
Drill starter holes at each corner and thencut with a jigsaw.
Press the saw firmly against the wall to minimize lath vibration.
Alternatively use a rotary cutter equipped with a plaster-cutting bit.
Practice first because it is hard to control.
A variation on this has side clamps that move out and toward the front as screws are tightened.
