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Книги Книги 1 - 10 з 22 у Hanger-boards must be so constructed that all wires and current-carrying devices....
" Hanger-boards must be so constructed that all wires and current-carrying devices thereon shall be exposed to view, and thoroughly insulated by being mounted on a non-combustible, non-absorptive insulating substance. All switches attached to the same must... "
Agents' and Inspectators Pocket-book of Fire Protection - Сторінка 91
автори: George Velten Steeb - 1902 - 218 стор.
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The Architect's and Builder's Pocket-book of Mensuration, Geometry ...

Frank Eugene Kidder - 1892 - 911 стор.
...shall be exposed to view, and thoroughly insulated by being mounted on a waterproof, non-combustible substance. All switches attached to the same must...constructed that they .shall be automatic in their action, not stopping between points when started, and preventing an arc between points under all circumstances....
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Standard Tables for Electric Wiremen: With Instructions for Wiremen and ...

Charles M. Davis - 1893 - 128 стор.
...shall be exposed to view, and thoroughly insulated by being mounted on a water-proof, non-combustible substance. All switches attached to the same must...constructed that they shall be automatic in their action, not stopping between points when started, and preventing an arc between points under all circumstances....
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The National Electrical Code: An Analysis and Explanation of the ...

Richard Henry Pierce - 1896 - 222 стор.
...shall be exposed to view and thoroughly insulated by being mounted on a waterproof, noncombustible substance. All switches attached to the same must...constructed that they shall be auto'matic in their action, not stopping between points when started, and preventing an arc between points under all circumstances,...
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New Catechism of Electricity: A Practical Treatise

Nehemiah Hawkins - 1896 - 541 стор.
...shall be exposed to view and thoroughly insulated by being mounted on a waterproof non-combustible substance. All switches attached to the same must...constructed that they shall be automatic in their action, not stopping between points when started, and pr» venting an arc between points under all circumstances....
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Electric Wiring for the Use of Architects, Underwriters, and the Owners of ...

Russell Robb - 1896 - 183 стор.
...shall be exposed to view and thoroughly insulated by being mounted on a waterproof, non-combustible substance. All switches attached to the same must...constructed that they shall be automatic in their action, not stopping between points when started, and preventing an arc between points under all circumstances....
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Electric Lighting Specifications

Earle Abbott Merrilol - 1896 - 213 стор.
...shall be exposed to view, and thoroughly insulated by being mounted on a waterproof, non-combustible substance. All switches attached to the same must...constructed that they shall be automatic in their action, not stopping between points when started, and preventing an arc between points under all circumstances....
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Electric Lighting Specifications for the Use of Engineers and Architects

Earle Abbott Merrill - 1896 - 213 стор.
...shall be exposed to view, and thoroughly insulated by being mounted on a waterproof, non- combustible substance. All switches attached to the same must...constructed that they shall be automatic in their action, not stopping between points when started, and preventing an arc between points under all circumstances....
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Transactions, Том 14

American Institute of Electrical Engineers - 1897
...43.) 48. Hanger-Boards.— a. Hanger-boards must he so constructed that all wires and current carrying devices thereon shall be exposed to view and thoroughly...preventing an arc between points under all circumstances. 49. Arc Lamps.— (For installation rules, see No. ig.) a. Must be provided with reliable stops to...
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Transactions of the American Society of Mechanical Engineers

American Society of Mechanical Engineers - 1898
...provided with keys, comply with the requirements for switches. (See No. 43.) 48. HANGER-BOARDS — a. Hanger-boards must be so constructed that all wires...preventing an arc between points under all circumstances. 49. ARC LAMPS — (For installation rules, see No. 19.) a. Must be provided with reliable stops to...
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Distributing system and lamps

Francis Bacon Crocker - 1901 - 505 стор.
...will the cord be subjected to the cutting or wearing action of a sharp edge. 66. Hanger-boards — a. Hanger-boards must be so constructed that all wires...preventing an arc between points under all circumstances. 57. Arc Lamps — (For installation rules, see ATo. 19.) a. Must be provided with reliable stops to...
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