[Electric engineering.] . fig. 6. connection between the lines, thus resulting in a shortcircuit. 10 INTERIOR WIRING. § 26 ELECTRIC LAMPS. INCANDESCENT LAMPS. 8. Before taking up the subject of wiring for electriclights, it will be well to look briefly at some of the charac-teristics of the lamps to which the wiring is to supply cur-rent, as the requirements of the lamps have a considerableinfluence on the character of the wiring. Incandescentlamps are the ones mostly used for interior illumination, sowe will briefly consider a few of their characteristics. Theselection of good lamps of proper
[Electric engineering.] . fig. 6. connection between the lines, thus resulting in a shortcircuit. 10 INTERIOR WIRING. § 26 ELECTRIC LAMPS. INCANDESCENT LAMPS. 8. Before taking up the subject of wiring for electriclights, it will be well to look briefly at some of the charac-teristics of the lamps to which the wiring is to supply cur-rent, as the requirements of the lamps have a considerableinfluence on the character of the wiring. Incandescentlamps are the ones mostly used for interior illumination, sowe will briefly consider a few of their characteristics. Theselection of good lamps of proper voltage, candlepower, andefficiency to suit the work for which they are to be used is amatter of great importance. The light-giving part or filament of an incandescent lampis of carbon, being generally made of carbonized cellulosethread. Its manufacture has been the subject of muchresearch by the large manufacturing companies, which keepthe details as secret as possible. A good lamp filamentmust be uniform in cross-sect
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