ELECTRICAL 

 DISTRIBUTION 



System is driven by a motor and the liquid in the 

 brine tanks is agitated by similar means. Other uses 

 of the motors are conventional application for ordi- 

 nary power purposes. 



The system of electrical distribution was fur- 

 nished and installed by the M. B. Foster Electric 

 Company, having its principal office 

 at No. 109 West Twenty-sixth Street, 

 New York City, and a branch office 

 at No. 220 Devonshire Street, Boston. Edward S. 

 Clinch, Jr., is the President of the Company, and 

 Mortimer B. Foster, Secretary and Treasurer. 



The installation includes the electric light and 

 power, wiring, generator leads, switch board, panel 

 boards, telephone conduits, watchman's time de- 

 tector and a low-tension system for supplying current 

 for operating bells and similar apparatus. 



The switchboard was built by the Diehl Manu- 

 facturing Company of Elizabethport, N. J. The slabs 

 are of white Italian marble and 

 have a copper-plated bronze base. 

 The switch board is of the most approved style. 

 There is not a fuse on it. The generators and 

 feeders are protected by the I.T.E. circuit breakers 

 of the double-pole double-arm laminated type, and 

 the circuit breakers protecting the generators have 

 the reverse current-release attachment. The office 

 of this attachment is to prevent the demagnetizing 

 or reversing of the generators. The indicating in- 

 struments are of the illuminating dial type, manufac- 

 tured by the Weston Electrical Instrument Company 

 of Newark. The weight of the switch board as it 

 stands, excepting the indicating instruments and watt- 

 meters, is 17,100 pounds, of which 8,400 pounds are 

 copper, 5,400 pounds marble and 3,300 pounds 

 iron. 



Although the 220 volt, 2-wire system is used for 



both lighting and power, the lighting feeders are of 



the 3-wire double neutral loop sys- 



1 tern, so arranged that it may readily 



be changed from the 3 to the 2-wire system. It 



also maintains an absolutely even voltage on every 



floor no matter at what distance from the switch 



board. 



The generator leads are paper insulated lead-cov- 

 ered cables, and contain 6,185 pounds of copper. All 

 the feeders and branch wires, from the basement to 

 the top of the Tower, are rubber covered, of the 



PANEL BOARDS 



"Tip Top" brand, and have an aggregate length of 

 67 miles, including 1,699,714 feet of single wire, 

 and 53,950 pounds of copper. This amount of 

 copper will make sufficient No. 14 wire, which is the 

 size used for branch work, to reach from New York 

 to Chicago. 



The largest feeder ever run to a similar height is 

 that which runs to the 36th floor, feeding the elevators 

 in the Tower. This feeder weighs 9,710 pounds and 

 each conductor is 670 feet long. 



The wire and generator leads were manufactured 

 by the Standard Underground Cable Company of 

 Pittsburg. The current carried by each feeder is 

 measured by an integrating wattmeter, made by the 

 Sangamo Electric Company. 



All wires are run in electro-duct iron conduit, 

 made by the American Circular Loom Company of 

 Chelsea, Mass. The conduit used weighs 105 tons, 

 and has an aggregate length of 30 miles, or over twice 

 the distance from the Battery to Spuyten Duyvil. 



The panel boards are of marbleized slate with 

 the main and each branch circuit protected by 

 National Electric Code enclosed 

 fuses. A unique idea was carried 

 out on these panels in covering the bus bars and 

 cross connection bars with fiber. This is the first 

 time this has ever been done, although it reduces 

 to a minimum the possibility of anyone causing a 

 short circuit by accidentally placing a tool or other 

 conductor across the bus bars. 



Very few brackets have been used in the building. 

 The general lighting of the offices is by means of 

 ceiling clusters, and receptacles are installed in the 

 baseboard for desk lights. 



There are 1,342 ceiling outlets, 

 441 bracket outlets, 1,902 base re- 

 ceptacles, with a capacity of 7,612 16-candle power 

 lights, and 989 flush push switches. 



The main corridor of the building is one of the 

 most artistic and beautiful of any building in the 

 city, and a system of lighting was absolutely necessary 

 that would not in any respect detract from the artis- 

 tic qualities of the corridor. The principal light is 

 derived from clusters of 48 8-candle power lamps 

 placed in the top of each dome in the ceiling and 

 above amber rippled glass. In addition to these 

 ceiling clusters, there are bronze brackets with 

 ground glass globes. The general effect produced 



CEILING 

 LIGHTS 



[ 103 J 



