The public traveling in the subway
should remember that even very severe short-circuits and extremely
bright flashes beneath the car involve absolutely no danger to
passengers who remain inside the car.
The photograph on page 120 illustrates the control wiring of the
new steel motorcars. The method of assembling the apparatus differs
materially from that adopted in wiring the outfit of cars first
ordered, and, as the result of greater compactness which has been
attained, the aggregate length of the wiring has been reduced
one-third.
The quality and thickness of the insulation is the same as in the case
of the earlier cars, but the use of asbestos conduits is abandoned
and iron pipe substituted. In every respect it is believed that the
design and workmanship employed in mounting and wiring the motors and
control equipments under these steel cars is unequaled elsewhere in
similar work up to the present time.
[Illustration: APPARATUS UNDER STEEL MOTOR CAR]
The motors and car wiring are protected by a carefully planned system
of fuses, the function of which is to melt and open the circuits, so
cutting off power in case of failure of insulation.
Express trains and local trains alike are provided with a bus line,
which interconnects the electrical supply to all cars and prevents
interruption of the delivery of current to motors in case the
collector shoes attached to any given car should momentarily fail to
make contact with the third rail.
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