 | New York (N.Y.) - 1913 - 254 стор.
...placed where exposed to mechanical injury nor in the immediate vicinity of easily ignitable stuff or where exposed to inflammable gases or dust or to flyings of combustible material. Where the occupancy of a building is such that switches, cut-outs, etc., cannot be located so as not... | |
 | Calvin Franklin Swingle - 1906 - 488 стор.
...wiremen of some experience. b. Must not be placed in the immediate vicinity of easily ignitable stuff or where exposed to inflammable gases or dust or to flyings of combustible material. In starch and candy factories, grain elevators, flouring mills, and buildings used for woodworking... | |
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... the wires ; that is, in a two-wire system the two wires, and in a three-wire system the three wires, must be protected by the cut-out and disconnected by the operation of the switch or circuit breaker. 
