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wire-gauze spark arresters, and 73. Spark Ar

wire globe nets.

resters and Nets.

sets of carbons, a set consisting 74. Carbons.

of one upper and one lower carbon.

(See p. 51, sec. 25.)

(See p. 51, sec. 26.)

(See Note: p. 52, sec. 27.)

Each bidder shall fill out completely

the following summary:

Number of dynamos

Trade number or designation

Rating in volts

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H. P. required to be delivered at

pulley at full load

75. Starting Plant and Instruction.

76. Renewal Parts.

77. Summary.

78. Switchboard Complete.

SWITCHBOARD APPARATUS AND CONNECTIONS.

This contractor shall furnish and erect the following apparatus and material:

One combination (material) switchboard with a capacity for circuits, and pro

vided with the necessary sockets, plugs,
main and transfer cables, testing connec-
tions, and a suitable and convenient de-
vice for holding cables not in use. It
shall be so arranged and marked that any
circuit or series of circuits may be quick-
ly connected with or disconnected from
any dynamo with the least possible dan-
ger of short-circuits or error. Sockets
shall be so designed that it is practically
impossible to short-circuit, ground or
receive a shock from them. All connec-
tions with the dynamo leads shall be
easily accessible. All wires used in
making connections shall have
sulation. All plugs shall have well in-
sulated wooden handles and the cables
shall be covered with soft-rubber tubing

in

or equivalent as an extra precaution. All cables shall be of stranded wire.

All joints shall be soldered. All connections to switches, cut-outs, etc., shall be soldered or made with an approved form of lug or set-screw, in all cases care being taken to secure good and sufficient contact to prevent heating and insure permanency; when made with lugs or setscrews they shall be in plain sight and easily accessible for tightening. Connecting wires shall be so run and secured that crosses or grounds are impossible in the normal operation of the plant.

FIXTURES, ETC.

(Note.-No set specification can be made 79. Fixtures

for fixtures and shades; their character must be determined wholly from individ

ual requirements. See schedule, p. 136).

and Shades.

This contractor shall furnish and de- 80. Lamps. liver at the following number, sizes,

and kinds of incandescent lamps:

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81. Sockets and Receptacles.

stating, also, their make and the make of the socket for which they are adapted.

Lamps shall be guaranteed to have an average life of not less than hours if burned at their normal voltage. They shall burn with a white light and shall not blacken under proper use. All lamps giving out or proving defective during the trial period of days under normal and proper use shall be replaced without charge.

This contractor shall furnish and deliver at the following numbers and kinds of sockets and receptacles:

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