Mechanical Equipment Of Federal Buildings Under The Control Of The Supervising Architect Treasury Department Nelson S Thompson Assistant Chief

Author : Nelson Scoville Thompson
Publisher : Rarebooksclub.com
ISBN 13 : 9781230052489
Total Pages : 44 pages
Book Rating : 4.0/5 (524 download)

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Download or read book Mechanical Equipment of Federal Buildings Under the Control of the Supervising Architect, Treasury Department Nelson S. Thompson, Assistant Chief written by Nelson Scoville Thompson and published by Rarebooksclub.com. This book was released on 2013-09 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt: This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1910 edition. Excerpt: ...are not located in partition walls less than 4" thick m1d are so placed that the face plate will seat on a smooth plane surface. A uniform size, 10 ampere, fuse is used for all branch ' circuits; the smallest wire in lighting fixtures used is No.16 B & S. The sizes of fuses for feeders and sub-feeders are selected to correspond to the carrying capacity of the wires, which the fuses protect. In case of a small switch controlling a large cable the size of the fuse is adapted to give protection and the planes of illumination for the several classes of rooms are as follows: Space Foot Candles Plans of Illumination Store Rooms, Machinery and boiler rooms, Cor ridors, Halls, Mailing 1.20 5' above Floor. Vestibules, Stairs. Post Office Work Room, ) Swing Room, Offices, ) Large Toilet Rooms ) 1.50 2'6" above'Floor. Large Vaults.' ) to 2.0 Court Rooms, Jury ) Rooms, Money Order and ) 2.0 2'6" above floor. Registry Rooms, Main ) Lobby. ) Civil Service Examin-) ation Rooms. ) 5.0 2'6" above Floor. Drafting Rooms ) 5.0 to 6.0 Drawing board.' Other spaces are treated as special cases. The following table gives the Lumens per Watt for the lamps and reflectors generally used. The total watts required to produce this general illumination with this equipment is obtained from the following formula: watts: Floor Area in Sguare Feet X Foot Candles K Lmmps Walls K Tungsten. Light' 4.0 Tungsten Dark 5.4 Carbon 3.1 W.P.C. Light 1.7 Carbon 3.1 W.P.G-Dark 1-4 Nernst Dark 3.3 Mercury Vapor Large Areas 6.6 Arc Lamps Large Areas 3-0. The value of K used is generally taken at 1.7; for carbon lamps and light walls. The above values apply to small and medium size roomsVery large rooms are given special consideration....