 | Frank Eugene Kidder - 1892 - 1058 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.... | |
 | Charles M. Davis - 1893 - 162 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.... | |
 | Richard Henry Pierce - 1896 - 234 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,... | |
 | Nehemiah Hawkins - 1896 - 568 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.... | |
 | Russell Robb - 1896 - 208 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.... | |
 | Earle Abbott Merrilol - 1896 - 232 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.... | |
 | Earle Abbott Merrill - 1896 - 222 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.... | |
 | American Institute of Electrical Engineers - 1897 - 708 стор.
...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... | |
 | American Society of Mechanical Engineers - 1898 - 1122 стор.
...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... | |
 | Francis Bacon Crocker - 1901 - 528 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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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... 
