. The street railway review . lops are made at infrequentintervals and the controllers are of ample capacity for llie svork, circuil breakers seem lo be sufficient for the protection of wiring amicar equipment. On cars operatefl in city service, where stops are made at fre-(|uent intervals, more chances for trouble occur incident to openingof circuits at the controller, and it seems to be good practice toemploy fuse boxes in scries with circuit breakers. In case of ashort circuit cither at the controller or in the car wiring, sufficientcurrent may flow to badly burn the controller or car Ujdy
. The street railway review . lops are made at infrequentintervals and the controllers are of ample capacity for llie svork, circuil breakers seem lo be sufficient for the protection of wiring amicar equipment. On cars operatefl in city service, where stops are made at fre-(|uent intervals, more chances for trouble occur incident to openingof circuits at the controller, and it seems to be good practice toemploy fuse boxes in scries with circuit breakers. In case of ashort circuit cither at the controller or in the car wiring, sufficientcurrent may flow to badly burn the controller or car Ujdy withoutopening the circuit breaker. If the short circuit is maintained, how-ever, the fuse will soon burn out, as it will not stand an overloadfor any length of time. In case of a sudden short circuit to ground,the circuit breaker will open before much damage Is done, and thefuse may not be burned out owing to the time limit of fusing. No. K. 5. Use both fuse box and circuit breaker. Without the fuse Bci, L Mouth Iron CoKiDun. DESIGNS OF BELLMOUTH AND METHOD OF SECURING THE LEADS. 18. How shall we do away with the breaking of motor lead^where they the iron conduit recommended by the Board ofUnderwriters? 1. A bellmuutli should be used at tlie end of the iron conduit, sodesigned as to hold the leads firmly to prevent any possible cleat should then be used at a distance of about 6 in. from thebellmouth, with a second one about 13 in. from the first, allowing theconnector to come between the two cleats. This method has beenused and found satisfactory. The accompanying sketches show thedesigns of bellmouth and method of securing the leads. No. 13. 2. Bring the cable leads out from the center of bolster to themotor, if motor is outside hung. Carry the motor leads over centerof motor to the cable leads and connect, leaving just enough slackto curve well. We have very little trouble with broken wires inthis way. No. 5. 3. Where wire leaves the conduit we wind friction
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Keywords: ., book, bookcentury1800, bookdecade1890, booksubjectstreetrailroads
