The Wireless Operators' Pocketbook of Information and Diagrams

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Bubier publishing Company, 1911 - Telegraph, Wireless - 197 pages
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Page 88 - Rules and Requirements of the National Electrical Code for the class of work installed and the following additional specifications: — a. Aerial conductors to be permanently and effectively grounded at all times when station is not in operation by a conductor not smaller than No. 4 B. & S.
Page 88 - S. gage copper wire, run in as direct line as possible to water pipe at a point on the street side of all connections to said water pipe within the premises, or to some other equally satisfactory earth connection. b. Aerial conductors when grounded as above specified must be effectually cut off from all apparatus within the building. c. Or the aerial...
Page 89 - ... mounted upon non-combustible, non-absorptive, insulating material of such dimensions as to give ample strength. Other approved arresters of equally low resistance and equally substantial construction may be used. d. In cases where the aerial is grounded as specified in...
Page 89 - Where supply is obtained direct from the street service the circuit must be installed in approved metal conduits or armored cable. In order to protect the supply system from high potential surges, there must be inserted in circuit either a transformer having a ratio which...
Page 88 - Or the aerial to be permanently connected at all times to earth in the manner specified above, through a short-gap lightning arrester; said arrester to have a gap of not over .015...
Page 16 - San Juan, PR (naval station) NAU Culebra, WI (naval station) NAV Guantanamo, Cuba...
Page 178 - THE LIST INCLUDES HOW TO MAKE ALL KINDS OF ELECTRICAL APPARATUS BOTH FOR PLEASURE AND PROFIT. A FEW SELECTED TITLES FROM A LIST OF OVER 150 ARE GIVEN BELOW ABC of Wireless Telegraphy Trevert...
Page 34 - Such an arrangement allows the current to pass more readily in one direction than in the other...
Page 89 - I, the switch employed to join the aerial to the ground connection shall not be smaller than a standard l00-ampere jack-knife switch.
Page 58 - Its conductors are very close together, and adjacent ones are charged with opposite kinds of electricity — one negatively and one positively.

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