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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... "
Electrical Engineer - Сторінка 201
1894
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The Electrical Review, Том 8

1891
...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...
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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...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...
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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...which they pass or to which they are attached. 5. Protected whenever necessary, in view of possible accidents to conductors or supports, from possibility...
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Electric Lighting Specifications for the Use of Engineers and Architects

Earle Abbott Merrill - 1892 - 176 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...
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A Hand-book of Wiring Tables for Arc, Incandescent Lighting, and Motor Circuits

Arthur Eugene Watson - 1892 - 76 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...
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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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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...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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Practical Dynamo Building: With Detail Drawings and Instructions for Winding

La Motte C. Atwood - 1893 - 143 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...
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The Electrical Transmission of Energy: A Manual for the Design of Electrical ...

Arthur Vaughan Abbott - 1895 - 586 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...
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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...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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