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" between them, not 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... "
Electric Lighting Specifications for the Use of Engineers and Architects - Сторінка 119
автори: Earle Abbott Merrill - 1892 - 176 стор.
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The Electrical Review, Том 8

1891
...insulating material, not easily abraded. 3. So placed that moisture cannot form a cross-connection between them, not less than a foot apart, and not...other than 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...
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Convention

National Electric Light Association. Convention - 1892
...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...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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New Catechism of Electricity: A Practical Treatise

Nehemiah Hawkins - 1896 - 541 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...
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The National Electrical Code: An Analysis and Explanation of the ...

Richard Henry Pierce - 1896 - 222 стор.
...conductors they confine. (See Definitions.) b. Must be so placed that moisture cannot form a crossconnection between them, not 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...
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Electric Wiring for the Use of Architects, Underwriters, and the Owners of ...

Russell Robb - 1896 - 183 стор.
...line-wire to the insulators. (Fig. 25.) 6. Must be so placed that moisture cannot form a crossconnection between them, not 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...
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New Catechism of Electricity: A Practical Treatise

Nehemiah Hawkins - 1897 - 541 стор.
...foot apart, and not in pna«fy<-f with anr substance other than flu'ii insulating sopporti. f. 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 inadatta guard irons or mm from possibility of contact with other conducting...
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Mechanics' Pocket Memoranda: A Convenient Pocketbook for All Persons ...

International Correspondence Schools - 1897 - 318 стор.
...ASSOCIATION. Incandescent Wires. Conducting wires, carried over or attached to buildings, must be (a) at least seven feet above the highest point of flat roofs, and (b) one foot above the ridge of pitch roofs ; (e) when in proximity to other conductors likely to divert...
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Transactions, Том 14

American Institute of Electrical Engineers - 1898
...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...over which they pass or to which they are attached. d. Must be protected by dead insulated guard iron or wires from possibility of contact with other conducting...
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Transactions of the American Society of Mechanical Engineers

American Society of Mechanical Engineers - 1898
...least two coats of waterproof paint. c. Must be at least seven feet above the highest point of fiat roofs, and at least one foot above the ridge of pitched...over which they pass or to which they are attached. d. Must be protected by dead insulated guard iron or wires from possibility of contact with other conducting...
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Electric lighting: a practical exposition of the art, for the use of ...

Francis Bacon Crocker - 1904
...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...over which they pass or to which they are attached. ti. Must be protected by dead insulated guard iron or wires from possibility of contact with other...
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