 | 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... | |
 | National Electric Light Association. Convention - 1892 - 458 стор.
...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...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.
...not in contact with any substance other than their insulating supports. (e) Must be at least seven feet above the highest point of flat roofs, and at...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... | |
 | Earle Abbott Merrill - 1892 - 188 стор.
...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...over which they pass or to which they are attached. 5. Protected, whenever necessary, in visw of possible accidents to conductors or supports, from possibility... | |
 | Charles M. Davis - 1893 - 162 стор.
...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...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... | |
 | 1894 - 622 стор.
...not In contact with any substance other than proper insulating supporta. 4. Must be at least seven feet above the highest point of flat roofs and at...over which they pass or to which they are attached. 5. Must be protected, whenever necessary, In view of possible accidents to conductors or supporta,... | |
 | Arthur Vaughan Abbott - 1895 - 646 стор.
...not in contact with any substance other than proper insulating supports. 4. Must be at least seven feet above the highest point of flat roofs, and at...over which they pass or to which they are attached. 5. Must be protected, whenever necessary, in view of possible accidents to conductors or supports,... | |
 | Earle Abbott Merrilol - 1896 - 232 стор.
...insulation equal to that of the conductors they confine. (See Definitions). c. Must be at least seven feet above the highest point of flat roofs, and at...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.
...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...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... | |
 | Nehemiah Hawkins - 1896 - 568 стор.
...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...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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Must be protected by dead insulated guard irons or wires from possibility of contact with other conducting wires or substances to which current may leak. Special precautions of this kind must be taken where sharp angles occur, or where any wires might... 
