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 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, 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. necting wires shall be so run and secured that crosses or grounds are impossible in the normal operation of the plant. FIXTURES, ETC. Con and Shades. (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). This contractor shall furnish and de- 80. Lamps. liver at the following number, sizes, and kinds of incandescent lamps: 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: |