 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...  Electrical Engineer - Сторінка 1991894Повний перегляд - Докладніше про цю книгу
 | 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 pass, or to which they are attached. 5. Protected whenever necessary, in view of possible accidents to conductors or supports, from possibility... | |
 | Frank Eugene Kidder - 1892 - 1058 стор.
...than a 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...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... | |
 | National Electric Light Association. Convention - 1892 - 458 стор.
...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...which they pass or to which they are attached. 5. Protected whenever necessary, in view of possible accidents to conductors or supports, from possibility... | |
 | Earle Abbott Merrill - 1892 - 188 стор.
...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...over which they pass or to which they are attached. must be taken where sharp angles occur, or where any wires might possibly come in contact with electric... | |
 | Arthur Eugene Watson - 1892 - 118 стор.
...air, and 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... | |
 | Earle Abbott Merrill - 1892 - 188 стор.
...RULES FOR WIRING. Outside Wires. 1. 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 pitch roofs; (c) when in proximity to other conductors likely to divert... | |
 | Charles M. Davis - 1893 - 162 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...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.
...air, and 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... | |
 | 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... | |
 | Russell Robb - 1896 - 208 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...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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