FIXTURES, OUTLETS, SWITCHES, ETC.
In residence wiring, we are as a rule con fined to chandeliers, wall brackets, and ceiling lights. The wall brackets are usually employed to increase the general illumination at certain points. Often outlets are provided in base boards, where portable lamps may be connected. In locating lamps and outlets, it is well to bear in mind that each outlet means an additional cost in the wiring.
After the outlets have been located, we next pass to the location of switches, distributing board, cut-out boxes, service switch, and meters.
The switches controlling the various groups of lamps should be located at the most convenient point in the room, which is usually, not always, near the entrance, so that one may turn the lights on or off just as he enters or leaves the room. The distributing board is, as its name implies, a distributing point where various branch circuits are connected to the main line. It should be located so as to make the various branch circuits as near the same length as possible.
Quite often, two switches are arranged to control the same circuit (see Fig. 8), being inter connected in such a way that lamps can be turned on or off at either switch independently of the other. This is quite a great convenience
in long hallways, and also in being able to con trol lamps in stairways from a switch on either floor.
Fig. 9 shows a two-wire distributing panel; 42=1 0 _5011 Fig. 9. Two-Wire Distributing Panel.
317 Fig. 10. Three-Wire Distributing PaneL and Fig. 10 a three-wire. Each of the branch circuits is provided with a fuse protection, and should not deliver more than 660 watts to any group of lamps. These distributing panels should be enclosed in fireproof boxes provided Fig. 11. Showing Location of Meter in Circuit.
with doors and fastenings. They may be mounted on the surface of the wall, or placed in the wall so that door is flush.
The cut-out and service switch should be lo cated in the circuit as near where the wires enter the building as possible.
The meter is installed in circuit just after the service switch (see Fig. 11). Where the in stallation is not large, the distributing panel may be dispensed with, and circuits run directly from the box shown in Fig. 11.