 | Earle Abbott Merrill - 1896 - 232 стор.
...less than a foot apart, and not in contact with any substance other than their insulating supports. c. Must be at least seven feet above the highest point of flat roofs, and at least one foot above the ridge of pitched roofs over which they pass or to which they are attached.... | |
 | American Institute of Electrical Engineers - 1897 - 710 стор.
...Service blocks must be covered over their entire surface with at least two coats of waterproof paint. c. Must be at least seven feet above the highest point of flat roofs, and at least one foot above the ridge of pitched roofs over which they pass or to which they are attached.... | |
 | International Correspondence Schools - 1897 - 346 стор.
...ASSOCIATION. Incandescent Wires. Conducting wires, carried over or attached to buildings, mast be (a) at least seven feet above the highest point of flat roofs, and (b) one foot above the ridge of pitch roofs ; (e) when in proximity to other conductors likely to divert... | |
 | American Society of Mechanical Engineers - 1898 - 1122 стор.
...Service blocks must be covered over their entire surface with at least two coats of waterproof paint. c. Must be at least seven feet above the highest point of flat roofs, and at least one foot above the ridge of pitched roofs over which they pass or to which they are attached.... | |
 | Charles Edwin Knox - 1907 - 242 стор.
...attached must be covered over their entire surface with at least two coats of water-proof paint. c. Must be at least seven feet above the highest point of flat roofs, and at least one foot above the ridge of pitched roofs over which they pass or to which they are attached.... | |
 | Albany (N.Y.) - 1910 - 950 стор.
...cornices and the like, all such wires shall be rigidly fastened by non-conducting fastenings; and where carried over or attached to buildings, must be at...feet above the highest point of flat roofs, and one and a half feet above pitch roofs, and placed so as to avoid ladders of the Fire Department. They shall... | |
 | 1913 - 242 стор.
...flexible metal conduit, or a waterproof conduit system must be employed. 12. Wires — Continued. c. Must be at least seven feet above the highest point of flat roofs, and at least one foot above the ridge of pitched roofs over which they pass or to which they are attached... | |
 | Harry Cooke Cushing - 1915 - 332 стор.
...conform to rules for unlined conduit except that conduit system must be waterproof (see p. 96). c. Must be at least seven feet above the highest point of flat roofs (see p. 43) and at least one foot above the ridge of pitched roofs over zvhich they pass or to which... | |
 | 1890 - 768 стор.
...except that service wires with special insulation may be permitted to touch foreign substances. 10. Conducting wires carried over or attached to buildings,...be at least seven feet above the highest point of Hat roofs, and one foot above the ridge of pitched roofs. Lines constructed subsequent to the adoption... | |
 | New York (N.Y.) - 1913 - 254 стор.
...flexible metal conduit, or a waterproof conduit system must be employed. 12. Wires — Continued. c. Must be at least seven feet above the highest point of flat roofs, and at least one foot above the ridge of pitched roofs over which they pass or to which they are attached... | |
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... c. Must be at least seven feet above the highest point of flat roofs, and at least one foot above the ridge of pitched roofs over which they pass or to which they are attached. 
