The Golden State: Where & How to Live, Secure, Visit, Enjoy and Thrive in California
Practical Electricity And House Wiring
In installing, fasten the switch or receptacle to the box but not tightly; leave the screw just loose enough so that if the box is not straight, you may still mount the device straight by virtue of the elongated holes. When you have found the proper position, tighten the screws securely. See Fig. 190. Installing Fixtures.—The correct installation of fixtures involves both proper wiring, and proper supporting. Your fixtures will probably be wired ready to use, and if they are, you will find one of the following schemes used: (a) one white wire, one another color; in this case the white wire connects to the white wire in outlet box; (b) two identical wires, one with a knot; the wire with knot corresponds to white wire; (c) two identical wires except that one is a solid color, the other the same color but with a tracer of different color woven into the fabric cover; in this case the wire with tracer corresponds to the white wire. The white wire on the fixture connects to the white wire in the outlet box.
If the fixtures are unwired, follow one of the above three methods, preferably the last, but make sure that the wire corresponding to white wire, connects with screw shells of the sockets; the other wire connects with the center terminals of the sockets.
Ceiling fixtures are supported on the box over which they are mounted. Larger pieces are fitted with a "hickey" fitting on the end of the "stem," as shown in Fig. 191. The canopy of the fixture moves on the stem, slides down while connections are made, slides up and is locked in position on the stem, concealing box and connections, with a set screw on the canopy itself.
Smaller pieces frequently employ a strap, which is fastened over the fixture stud in the box, or to the "ears" on the box. The fixture is then fastened to the strap. Fig. 192 will make this clear.
Wall brackets usually are provided with an extension rod fitting into the fixture stud in a box, which method will be self-explanatory upon reference to Fig. 193.
