Page:Incandescent electric lighting- A practical description of the Edison system.djvu/84

 an elevator shaft, hallway, or suitable space provided in the walls for this purpose, as nearly central as may be, and are carried up to the topmost floor to be lighted. On each floor the wires pass through what is known as a pocket, which is generally a boxed-up space provided with a door for easy access to the enclosure.

In this pocket are arranged a number of cut-outs and switches corresponding to the number of branch circuits to be run to the several rooms on that floor. At this pocket, by turning the proper switch » lights may be turned on in any room before entering it, or the current may simply be turned on, and the lights on that branch be cut in one by one by turning the keys with which each socket is provided.

For large chandeliers, a switch is generally arranged against the walls, at some suitable point in the room by which all the lamps on the chandelier may be turned on at one and the same time.

Arrangements are often provided by