[Electric engineering.] . hanged to single stroke. In the case of an actual installa-tion, it might be necessaryto run the wires in someother manner than as herelaid out, depending on theconstruction of the build-ing; but, from the direc-tions already given, itshould be an easy matterto devise the best ar-rangement. The choice be-tween series and parallel connection of the bells will dependon which is more economical in copper for the line the bells in multiple requires a larger volume ofcurrent to be supplied than when they are in series, becausethe total current subdivides amon
[Electric engineering.] . hanged to single stroke. In the case of an actual installa-tion, it might be necessaryto run the wires in someother manner than as herelaid out, depending on theconstruction of the build-ing; but, from the direc-tions already given, itshould be an easy matterto devise the best ar-rangement. The choice be-tween series and parallel connection of the bells will dependon which is more economical in copper for the line the bells in multiple requires a larger volume ofcurrent to be supplied than when they are in series, becausethe total current subdivides among all the bells. This callsfor a large battery and large wires. When the branchcircuit containing one bell is very much longer, and henceof higher resistance than the branch containing anotherbell, the current will not divide equally between the twobells, and hence the parallel arrangement may not be satis-factory in such cases. Placing the bells in series requires anadditional cell or two, but no larger wire is Fig. 17. 28 INTERIOR WIRING. 35 47. Wiring: for Three Bells and Three Push But-tons.—Fig-. IS shows a plan of wiring that is often used for Front Door Be// Q Bear Door Be//. Buzzer rs^i FronfDoorPush© - Dm/no RearDoorPush Fig. IS. the bell system in a small dwelling where no annunciatoris used. 4:8. Wiring* for Simple Annunciator.—A wiring dia-gram for a simple annunciator system is shown in Fig. pushes 1, 2, 3, etc. are £7 ®2~ ~3©1 <§*_ 4 ^ located at convenient pointsin the various rooms, oneterminal being connectedto the battery wire b andthe other to the leadingwire / communicating withthe annunciator drop corre-sponding to that room. Thebattery wire is run fromone pole of the battery directto one side of each of thepushes. The other side ofeach push is then connectedto its drop on the annun-ciator. A battery of three or four Leclanche cells is placedat B in any convenient location, but should not be set in adark or inaccessi
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