[Electric engineering.] . Fig. 42. /. III.—17 68 ELECTRIC LIGHTING. 16 a number of the shunt coils are liable to be burned shunt coils are mounted in cast-iron boxes, which alsoserve for the base of the bracket supporting the 42 shows the shunt-coil box. The hole a is tapped. Fig. 43. to receive the gas-pipe bracket, as shown in Fig. 43. Streetincandescent lamps are usually provided with white enam-eled reflectors and are mounted about 10 to 15 feet abovethe o-round. SUMMARY. 76. The methods of distribution described above repre-sent those commonly used in practice, and it wi
[Electric engineering.] . Fig. 42. /. III.—17 68 ELECTRIC LIGHTING. 16 a number of the shunt coils are liable to be burned shunt coils are mounted in cast-iron boxes, which alsoserve for the base of the bracket supporting the 42 shows the shunt-coil box. The hole a is tapped. Fig. 43. to receive the gas-pipe bracket, as shown in Fig. 43. Streetincandescent lamps are usually provided with white enam-eled reflectors and are mounted about 10 to 15 feet abovethe o-round. SUMMARY. 76. The methods of distribution described above repre-sent those commonly used in practice, and it will be seenthat the electrical engineer has a large number of methodsfrom which to choose when installing a plant. Just whichone is best suited to any particular case will be decidedlargely by the amount of the power and the distance overwhich it is to be transmitted. The use of multiphase sys-tems is becoming very popular, and they are now verycommon whenever the power is to be transmitted for anyconsiderable distance. Either the two-phase or three-phasesystems are suitable for this work, and there is little choicebetween them. Direct current, using either the two-wire orthree-wire system, will, no doubt, continue to be used very § 16 ELECTRIC LIGHTING. 69 extensively for isolated pla
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