 | 1891 - 680 стор.
...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 which they...are attached. 5. Protected whenever necessary, in view of possible accidents to conductors or supports, from possibility of contact with other conducting... | |
 | 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...are attached. 5. Protected whenever necessary, in view of possible accidents to conductors or supports, from possibility of contact with other conducting... | |
 | Frank Eugene Kidder - 1892 - 1058 стор.
...foot apart, and not in contact with any substance other than their insulating supports. (e) Must be at least seven feet above the highest point of flat...over which they pass or to which they are attached. (d) Must bo protected by dead insulated guard irons or irirt& from possibility of contact with other... | |
 | Arthur Eugene Watson - 1892 - 118 стор.
...their proper insulating supports. 5. Conducting wires carried over or attached to buildings, must be at least seven feet above the highest point of flat roofs, and one foot above the ridge of pitch roofs. Lines constructed subsequent to the adoption of these regulations... | |
 | Charles M. Davis - 1893 - 162 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... | |
 | La Motte C. Atwood - 1893 - 180 стор.
...their proper insulating supports. 5. Conducting wires carried over or attached to buildings, must be at least seven feet above the highest point of flat roofs, and one foot above the ridge of pitch roofs. Lines constructed subsequent to the adoption of these regulations... | |
 | 1894 - 622 стор.
...foot apart and not In contact with any substance other than proper insulating supporta. 4. Must be at least seven feet above the highest point of flat...which they pass or to which they are attached. 5. Must be protected, whenever necessary, In view of possible accidents to conductors or supporta, from... | |
 | Arthur Vaughan Abbott - 1895 - 646 стор.
...EXCHANGE. 161. Outside Wires. — Conducting wires carried over or attached to buildings must be (a) at least seven feet above the highest point of flat roofs, and (6) one foot above the ridge of " pitched :' roofs : (£) when in proximity to other conductors likely... | |
 | Richard Henry Pierce - 1896 - 234 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 conducting... | |
 | Earle Abbott Merrilol - 1896 - 232 стор.
...wires having an insulation equal to that of the conductors they confine. (See Definitions). 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... | |
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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... 
