These transformers deliver current to two separate systems of
secondary wiring, one of which is supplied at a potential of 120 volts
and the other at 600 volts.
The general lighting of the passenger station platforms is effected by
incandescent lamps supplied from the 120-volt secondary wiring
circuits, while the lighting of the subway sections between adjacent
stations is accomplished by incandescent lamps connected in series
groups of five each and connected to the 600-volt lighting circuits.
Recognizing the fact that in view of the precautions taken it is
probable that interruptions of the alternating current lighting
service will be infrequent, the possibility of such interruption is
nevertheless provided for by installing upon the stairways leading to
passenger station platforms, at the ticket booths and over the tracks
in front of the platforms, a number of lamps which are connected to
the contact rail circuit. This will provide light sufficient to enable
passengers to see stairways and the edges of the station platforms in
case of temporary failure of the general lighting system.
The general illumination of the passenger stations is effected by
means of 32 c. p. incandescent lamps, placed in recessed domes in the
ceiling. These are reinforced by 14 c. p. and 32 c. p. lamps, carried
by brackets of ornate design where the construction of the station
does not conveniently permit the use of ceiling lights. The lamps are
enclosed in sand-blasted glass globes, and excellent distribution is
secured by the use of reflectors.
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