Ceiling Lights

Ceiling fixtures don’t have any moving parts and their wiring is very simple, so, other than changing bulbs, you’re likely to get decades of trouble-free service from a fixture. This sounds like a good thing, but it also means that the fixture probably won’t fail and give you an excuse to update a room’s look with a new one. Fortunately, you don’t need an excuse. Upgrading a fixture is easy and can make a dramatic impact on a room. You can substantially increase the light in a room by replacing a globe-style fixture by one with separate spot lights, or you can simply install a new fixture that matches the room’s décor.

NNo matter what a ceiling light fixture looks like on the outside, they all attach in basically the same way. An electrical box in the ceiling is fitted with a mounting strap, which holds the fixture in place. The bare wire from the ceiling typically connects to the mounting strap. The two wires coming from the fixture connect to the black and the white wires from the ceiling.

If the new fixture is much heavier than the original fixture, it will require additional bracing in the ceiling to support the electrical box and the fixture. The manufacturer’s instructions should specify the size and type of box. If the ceiling is finished and there is no access from above, you can remove the old box and use an adjustable remodeling brace appropriate for your fixture (shown). The brace fits into a small hole in the ceiling (inset). Once the bracing is in place, install a new electrical box specified for the new fixture.

Recessed Ceiling Lights

Recessed lights are versatile fixtures suited for a variety of situations. Fixtures rated for outdoor use can also be installed in roof soffits and overhangs for accent and security lighting. Recessed fixtures can also be installed over showers or tubs. Be sure to use fixture cans and trims rated for bathroom use.

There are recessed lighting cans in all shapes and sizes for almost every type of ceiling or cabinet. Cans are sold for unfinished ceilings (new construction) or for finished ceilings (retrofit installation). Cans are also rated as insulation compatible or for uninsulated ceilings. Be sure to use the correct one for your ceiling to prevent creating a fire hazard.

Vanity Lights

Many bathrooms have a single fixture positioned above the vanity, but a light source in this position casts shadows on the face and makes grooming more difficult. Light fixtures on either side of the mirror is a better arrangement. For a remodel, mark the mirror location, run cable, and position boxes before drywall installation. You can also retrofit by installing new boxes and drawing power from the existing fixture. The light sources should be at eye level; 66" is typical. The size of your mirror and its location on the wall may affect how far apart you can place the sconces, but 36 to 40" apart is a good guideline.

Turn off the power at the service panel. Remove the old fixture from the wall and test to make sure that the power is off. Then remove a strip of drywall from around the old fixture to the first studs beyond the approximate location of the new fixtures. Make the opening large enough that you have room to route cable from the existing fixture to the boxes. Mark the location for the fixtures and install new boxes. Install the boxes about 66" above the floor and 18 to 20" from the centerline of the mirror (the mounting base of some fixtures is above or below the bulb, so adjust the height of the bracing accordingly). If the correct location is on or next to a stud, you can attach the box directly to the stud, otherwise you’ll need to install blocking or use boxes with adjustable braces (shown). Open the side knockouts on the electrical box above the vanity. Then drill 5/8" holes in the centers of any studs between the old fixture and the new ones. Run two NM cables from the new boxes for the fixtures to the box above the vanity. Protect the cable with metal protector plates. Secure the cables with cable clamps, leaving 11" of extra cable for making the connection to the new fixtures. Remove sheathing and strip insulation from the ends of the wires. Connect the white wires from the new cables to the white wire from the old cable, and connect the black wires from the new cables to the black wire from the old cable. Connect the ground wires. Cover all open boxes and then replace the drywall, leaving openings for the fixture and the old box. (Cover the old box with a solid junction box cover plate.) Install the fixture mounting braces on the boxes. Attach the fixtures by connecting the black circuit wire to the black fixture wire, and connecting the white circuit wire to the white fixture wire. Connect the ground wires. Position each fixture over each box, and attach with the mounting screws. Restore power and test the circuit.

Low-voltage Cable Lights

This unique fixture system is a mainstay of retail and commercial lighting and is now becoming common in homes. Low-voltage cable systems use two parallel cables to suspend and provide electricity to fixtures mounted anywhere on the cables. A 12-volt transformer feeds low-voltage power to the cables. The system’s ease of installation, flexibility, and the wide variety of individual lights available make it perfect for all kinds of spaces. Low-voltage cable light systems are ideal for retrofits and for situations where surface-mounted track is undesirable or impossible to install.

Lay out locations for the screw eyes that are used to suspend the cables, which should be in a parallel line. The path should lead the cables within a foot of the existing ceiling fixture box that you are using to provide power. Install wall anchors at the appointed locations for the screw eyes that will suspend the cables. Plastic sleeve anchors are adequate in most cases. Drive the anchors into guide holes with a hammer. Twist the screw eyes into the wall anchor sleeves, taking care to make sure they are driven in equal amounts and are not overdriven. Install a set of screw eyes the same distance apart on each facing wall in the installation area. Cut two pieces of low-voltage cable to span between screw eyes on facing walls. Recommendations may vary—for the project shown here the cable is cut 12" shorter than the distance between the screw eyes. Use the crimping hardware in your kit to form small loops at the ends of each cable. Slip the loops over the screw eyes on one end, and attach them to turnbuckles at the opposite ends. Slide the turnbuckles over the screw eyes and tighten them until the cables are taut. Attach the transformer crossbar to the electrical box containing the circuit leads. Shut off the power at the main service panel and test for power, then remove the old fixture if you have not already done so. Make wiring connections for the transformer inside the electrical box. Make sure the transformer is supported while you join the wires. Be sure to attach the grounding wires to the grounding screw or clip in the box. Mount the transformer onto the electrical box according to the manufacturer’s instructions. The model shown here has a separate chrome cover that is secured with a setscrew after the transformer is mounted to the crossbar. Thread short lengths of cable into the openings on the screw terminals on the transformer. Tighten the screws until the pointed probe in each terminal pierces the cable sheathing and makes contact with the wire inside. Do the same with the other ends of the jumper cables using the provided connector hardware.

Aurther

Current with 2011-2013 Electrical Codes

Downlaod Book