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243
ELECTRIC LIGHTING INSTALLATION.
The Electric Lighting Committee having visited several
existing electric installations, with a view of inquiring into
the several systems, instructed the Surveyor to prepare a
synopsis of the information obtained, and in accordance
therewith the following report was laid before the Committee:—
ST. PANCRAS.
The works are situated in Stanhope Street, and have been
erected to supply current to the South Western area of the
district, being from 1 mile to 1¼ square.
The Vestry purchased the site for £10,000; it is freehold and
included a considerable number of small houses. About one
halt of the site only has been cleared for the station, and the
houses on the remainder yield a revenue from rents. The works
were designed to serve 10,000 incandescent lamps of 16 c.-p.,
together with 90 arc lamps.
The engine house is about 100 ft. long by 26 to 28 ft. wide;
the boiler house is at the back of the engine house, the other
parts of the building consists of battery room, testing room,
office and stores. There is also an underground tank for
storing water capable of holding 170,000 gallons.
The chimney is 90 feet high.
There are 8 water tube boilers of the Babcock and Wilcox
type, 5 being 250 h.p. and 3 of 150 h.p.; 1 lb. of best Welsh
coals evaporates about 9 lb. of water.
There are 17 engines and dynamos, 12 being for private lighting,
and 5 for street lighting. Two dynamos of 120 h.p. are kept
running during the day to drive the motors for trade purposes.
The engines are of the triple expansion type, and are supplied
by Messrs. Willins & Robinson. Fourteen of the dynamos are of
the Kapp type, made by Messrs. Johnson & Phillips, and 3 by
Messrs. Clarke, Murehead & Co.
The arc lamps are placed on posts 25 ft. from the ground.
They are fixed from 120 to 240 feet apart along the middle of
the road.
There is an arrangement for cooling the hot water from the
condensers. The arrangement consists of a large surface of
corrugated iron sheets, over which the water flows, being
collected underneath, and returned to the bottom tank. The
plates providing the cooling surfaces are attached to framing,
which is supported on the main chimney shaft.
Q 2