. Motion picture electricity. is made aware of this voltage variation,and corrects it, the better for all concerned. INTERIOR SERVICE After proper mains have been brought into a buildingfor the supply of electric current, a service switch withfuses of proper capacity must be installed as close to theentrance of the wires as convenient. The purpose of thisswitch is to disconnect entirely the electric current sup-ply from the building at night, so as to insure perfectsafety and also give the proprietor absolute insurancethat no lamp is burning which would cause the meter toregister unexpectedly
. Motion picture electricity. is made aware of this voltage variation,and corrects it, the better for all concerned. INTERIOR SERVICE After proper mains have been brought into a buildingfor the supply of electric current, a service switch withfuses of proper capacity must be installed as close to theentrance of the wires as convenient. The purpose of thisswitch is to disconnect entirely the electric current sup-ply from the building at night, so as to insure perfectsafety and also give the proprietor absolute insurancethat no lamp is burning which would cause the meter toregister unexpectedly and unnecessarily. The electric lighting company will then install an elec- MOTION PICTURE ELECTRICITY 65 trie meter of proper size, and the wires from the metermay then be run to an electric distribution panel, whichmust contain the necessary fuses and switches for theprotection of the various groups of lamps, fans, motion TO LINE LINE FUSES SWITCH A lA_& 4 Zo\ [oooej CIRCUIT FUSES^CIRCUIT SWITCHES TO CIRCUITTO CIRCUIT-. METER Jo) BUS BARS PANEL ORDISTRIBUTING BOARD Fifr. 30 picture machines, flaming arc lamps, spot lights, etc. Thepanel board referred to is usually located at a convenientpoint where the manager or other person in charge hasfull control of every circuit, permitting the turning on 66 MOTION PICTURE ELECTRICITY and off of the various circuits, and the fuses should beof proper capacity to protect the wires connected to theswitches. The term panel board usually signifies a small switchboard made of slate, upon which are mounted bus-bars,or copper strips, to which the mains are connected, in-cluding also the proper number and size of switches andfuses which are connected to the bus-bars. The variouscircuits are then connected to the switches. Two-Wire Service.—Fig. 30 is a diagram illustrat-ing a typical two-wire installation, including the fol-lowing: Line fuses. Line switch. Meter. Panel board for ten circuits. It is evident that in place of the panel illustrat
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Keywords: ., bo, bookcentury1900, bookdecade1910, bookidmotionpictureele00hall
