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Книги Книги 1 - 10 з 18 у ... c. Must be at least seven feet above the highest point of flat roofs, and at....
" ... 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 to which they are attached. "
A Hand-book of Wiring Tables for Arc, Incandescent Lighting, and Motor Circuits - Сторінка 51
автори: Arthur Eugene Watson - 1892 - 76 стор.
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The Architect's and Builder's Pocket-book of Mensuration, Geometry ...

Frank Eugene Kidder - 1892 - 911 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 of flat roofs, and at least one foot above the ridge of pitched roofs over which they pass or to which they are attached....
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Convention

National Electric Light Association. Convention - 1892
...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 or to which they are attached....
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Electric Lighting Specifications for the Use of Engineers and Architects

Earle Abbott Merrill - 1892 - 176 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...
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Practical Dynamo Building: With Detail Drawings and Instructions for Winding

La Motte C. Atwood - 1893 - 143 стор.
...not placed in such position that it would be easy for water, or any liquid, to form cross connection between them, and main conductors or feeders should...to the adoption of these regulations should not be ran over and attached to buildings other than those in which the light or power is being, or is to...
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Standard Tables for Electric Wiremen: With Instructions for Wiremen and ...

Charles M. Davis - 1893 - 128 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 of flat roofs and at least one foot above the ridge of pitched roofs over which they pass or to which they are attached....
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Electrical Engineer, Том 17

1894
...less than a 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 roofs and at least one foot above the ridge of pitched roofs over which they pass or to which they are attached....
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The Electrical Transmission of Energy: A Manual for the Design of Electrical ...

Arthur Vaughan Abbott - 1895 - 586 стор.
...than a foot apart, and 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 least one foot above the ridge of pitched roofs over which they pass or to which they are attached....
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Electric Wiring for the Use of Architects, Underwriters, and the Owners of ...

Russell Robb - 1896 - 183 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 of flat roofs, and at least one foot above the ridge of pitched roofs over which they pass or to which they are attached....
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New Catechism of Electricity: A Practical Treatise

Nehemiah Hawkins - 1896 - 541 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 of flat roofs, and at least one foot above the ridge of pitched roofs over which they pass or to which they are attached....
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Electric Lighting Specifications

Earle Abbott Merrilol - 1896 - 213 стор.
...tie 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 roofs, and at least one foot above the ridge of pitched roofs over which they pass or to which they are attached....
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