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FOR MANAGERS AND OPERATORS
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is called the push button wire and the whites are called the individual wires. It is these latter wires which determine which bell a button will ring and you may cause a button to ring a different bell by simply changing the individual wire to that bell. Fig. 305 shows a plan of this system.
Figure 306.
An additional bell easily may be installed at any time as follows : Test the bell and install it and its push-button wherever you want them to be. Now with a piece of first color wire connect one binding post of the bell with the first color wire already in use wherever you can find it. With a piece of second color wire connect one side of the push-button with a second color wire wherever you can find one. Understand you can just tap on to these wires at any point you can locate one of proper color. Now connect the remaining side of the button with the remaining side of the bell with third color wire and the job is done. The rules governing this system of wiring are as follows : One side of the battery must be connected with one side of each bell by first color wire. The other side of the battery must be connected to one side of each push-button with second color wire and the remaining side of each button must be connected with the remaining side of the bell it is to ring with third color wire.
The various battery combinations are illustrated in Fig. 306. A increases the voltage without affecting the amperage. B increases amperage without affecting voltage. C increases amperage and voltage. A is series, B multiple and C is a multiple of series.