 | 1905 - 484 стор.
...A slate slab is preferable. Special attention is called to the fact that switchboards should not bo built down to the floor, nor up to the ceiling, but a space of at least ten or twelve inches should be left between the floor and the board, and from eighteen to twenty-four... | |
 | Howard Monroe Raymond - 1906 - 662 стор.
...separated therefrom by a non-inflammable, non-absorptive insulating material. A slate slab is preferable. Special attention is called to the fact that switchboards...floor, nor up to the ceiling, but a space of at least ten or twelve inches should be left between the floor and the board, and from eighteen to twenty-four... | |
 | American School (Chicago, Ill.) - 1906 - 528 стор.
...slate slab is preferable. Special attention is called to the fact that switchboards should not 157 be built down to the floor, nor up to the ceiling, but a space of at least ten or twelve inches should be left between the floor and tho board, and from eighteen to twenty-four... | |
 | 1906 - 590 стор.
...separated therefrom by a non-inflammable, non-absorptive insulating material. A slate slab is preferable. Special attention is called to the fact that switchboards should not be "-iiZ* i .-*-=. - ; -~zf: i>:r. z»:c ^p » tie ctCisg, bat a space of at -.tz. .r Tv-l-* iir^ies *i»;di... | |
 | American School (Lansing, Ill.) - 1907 - 438 стор.
...separated therefrom by a non-inflammable, non-absorptive insulating material. A slate slab is preferable. Special attention is called to the fact that switchboards...floor, nor up to the ceiling, but a space of at least ten or twelve inches should be left between the floor and the board, and from eighteen to twenty-four... | |
 | Henry Charles Horstmann, Victor Hugo Tousley - 1908 - 352 стор.
...switchboard Is of concrete or other fireproof construction, and a spare of three feet, If possible, between the ceiling and the board, In order to prevent fire from communicating from tlio switchboard to the floor or ceiling, and also to prevent the farming of a partially concealed... | |
 | Dallas (Tex.). - 1914 - 266 стор.
...in localities other than engine rooms, for in engine rooms they would be under expert supervision. Special attention is called to the fact that switchboards...be built down to the floor, nor up to the ceiling. A space of at least ten or twelve (10 or 12) inches should be left between the floor and the board,... | |
 | Harry Cooke Cushing - 1915 - 332 стор.
...mechanical injury or moisture, be run in approved conduit or equivalent. Special attention is again called to the fact that switchboards should not be...floor, nor up to the ceiling, but a space of at least ten or twelve inches should be left between the floor and the board, and thirty-six inches between... | |
 | Harry Cooke Cushing - 1917 - 374 стор.
...flexible tubing to extend at least i inch beyond the ends of the conduit. Special attention is again called to the fact that switchboards should not be...floor, nor up to the ceiling, but a space of at least ten or twelve inches should be left between the floor and the board, and thirty-six inches between... | |
 | Calvin Franklin Swingle - 1906 - 488 стор.
...placed as to reduce to a minimum the danger of communicating fire to adjacent combustible material. Special attention is called to the fact that switchboards...be built down to the floor, nor up to the ceiling. A space of at least 10 or 12 inches should be left between the floor and the board, and 3 feet, if... | |
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Special attention is called to the fact that switchboards should not be built down to the floor, nor up to the ceiling, but a space of at least ten or twelve inches should be left between the floor and the board, and from eighteen to twenty-four inches... 
