 | 1891 - 680 стор.
...insulating material, not easily abraded. 3. So placed that moisture cannot form a cross-connection between them, not less than a foot apart, and not...other than proper insulating supports. 4. At least 7ft. above the highest point of flat roofs, and at least 1ft. above the ridge of pitched roofs, over... | |
 | National Electric Light Association. Convention - 1892 - 458 стор.
...equal to that of the conductors they confine. 3. So placed that moisture cannot form a cross-connection between them ; not less than a foot apart and not...over which they pass or to which they are attached. 5. Protected whenever necessary, in view of possible accidents to conductors or supports, from possibility... | |
 | Nehemiah Hawkins - 1896 - 568 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... | |
 | Richard Henry Pierce - 1896 - 234 стор.
...conductors they confine. (See Definitions.) b. Must be so placed that moisture cannot form a crossconnection between them, not 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... | |
 | Russell Robb - 1896 - 208 стор.
...line-wire to the insulators. (Fig. 25.) 6. Must be so placed that moisture cannot form a crossconnection between them, not 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... | |
 | Nehemiah Hawkins - 1897 - 574 стор.
...foot apart, and not in pna«fy<-f with anr substance other than flu'ii insulating sopporti. f. 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 inadatta guard irons or mm from possibility of contact with other conducting... | |
 | International Correspondence Schools - 1897 - 346 стор.
...ASSOCIATION. Incandescent Wires. Conducting wires, carried over or attached to buildings, must 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 Institute of Electrical Engineers - 1898 - 716 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... | |
 | American Society of Mechanical Engineers - 1898 - 1122 стор.
...least two coats of waterproof paint. c. Must be at least seven feet above the highest point of fiat roofs, and at least one foot above the ridge of pitched...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 - 1904 - 696 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. ti. Must be protected by dead insulated guard iron or wires from possibility of contact with other... | |
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between them, not less than a foot apart and not in contact with any substance other than proper insulating supports. 4. 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... 
