 | Nehemiah Hawkins - 1896 - 570 стор.
...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...over which they pass or to which they are attached. d. Must be protected by dead insulated guard irons or wires from possibility of contact with other... | |
 | Russell Robb - 1896 - 206 стор.
...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...over which they pass or to which they are attached. d. Must be protected by dead insulated guard irons or wires from possibility of contact with other... | |
 | American Institute of Electrical Engineers - 1897 - 710 стор.
...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...over which they pass or to which they are attached. d. Must be protected by dead insulated guard iron or wires from possibility of contact with other conducting... | |
 | 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.
...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...over which they pass or to which they are attached. d. Must be protected by dead insulated guard iron or wires from possibility of contact with other conducting... | |
 | Francis Bacon Crocker - 1901 - 528 стор.
...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...over which they pass or to which they are attached. d. Must be protected by dead insulated guard iron or wires from possibility of contact with other conducting... | |
 | Horatio Alvah Foster - 1901 - 1018 стор.
...at least two coats of waterprooi paint. c. Must be at least seven U;t;t above the highest point ot flat roofs, and at least one foot above the ridge of pitched roofs over which they pass or to which tliey are attached. (I. Must he protected by dead insulated guard iron or wires from possibility of... | |
 | Arthur Vaughan Abbott - 1904 - 754 стор.
...insulating supports. Service-blocks must be covered with two coats of waterproof paint. c. Must be at least seven feet above the highest point of flat...at least one foot above the ridge of pitched roofs. if. Must be protected by dead insulated guard iron or wires from possibility of contact with other... | |
 | Charles Edwin Knox - 1907 - 336 стор.
...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...over which they pass or to which they are attached. Roof structures are frequently found which are too low or much too light for the work, or which have... | |
 | Henry Charles Horstmann, Victor Hugo Tousley - 1908 - 352 стор.
...covered over their entire surface with at least two coats of waterproof paint. c. Must be at least 7 feet above the highest point of flat roofs, and at...over which they pass or to which they are attached. Roof structures are frequently found which are too low or much too light for the work, or which have... | |
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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... 
