 | Frank Eugene Kidder - 1892 - 1032 стор.
...equally non combustible back boards. Jack-knife switches, whether provided with friction or spring stops, must be so placed that gravity will tend to open rather than close the switch. FIXTURE WORK. 27. (a) In all cases where conductors are concealed within or attached to gas fixtures,... | |
 | Earle Abbott Merrill - 1892 - 188 стор.
...handle. 4. Have carrying capacity sufficient to prevent heating above the surrounding atmosphere. 5. Be placed in dry accessible places, and be grouped as far as possible, being mounted, when practicable, upon slate or equally indestructible back boards. MOTORS. — In wiring... | |
 | Frank Eugene Kidder - 1892 - 1058 стор.
...been imparted by the handle. (d ) Must have carrying capacity sufficient to prevent heating. (e) Must be placed in dry, accessible places and be grouped as far as possible, being mounted — when practicable — upon slate or equally non combustible back boards. Jack-knife... | |
 | National Electric Light Association. Convention - 1892 - 458 стор.
...handle. 4. Have carrying capacity sufficient to prevent heating above the surrounding atmosphere. 5. Be placed in dry, accessible places, and be grouped as far as possible, being mounted, when practicable, upon slate or equally indestructible back boards. MOTORS. — In wiring... | |
 | Charles M. Davis - 1893 - 162 стор.
...... 16.... 13.... 20 .... . ... 15 .... 5 3 3 ... 5.... 3.... 2. . . . .... 15 1O .... 5 3 e. Must be placed in dry, accessible places, and be grouped as far as possible, being mounted — when practicable — upon slate or equally non-combustible backboards. Jack-knife... | |
 | 1894 - 622 стор.
...пате carrying capacity sufficient to prevent heating above the surrounding atmosphere. б. Must be placed In dry accessible places and be grouped, as far as possible, being mounted, when practicable, upon slate or equally indestructible backboarda. Motor*. 1. In wiling... | |
 | Arthur Vaughan Abbott - 1895 - 646 стор.
...Must have carrying capacity sufficient to prevent heating above the surrounding atmosphere. 5. Must be placed in dry, accessible places, and be grouped as far as possible, being mounted, when practicable, upon slate or equally indestructible backboards. 139. MOTORS. 1. In... | |
 | Earle Abbott Merrill - 1896 - 222 стор.
...equally noncombustible backboards. Jackknife switches, whether provided with friction or spring stops, must be so placed that gravity will tend to open rather than close the switch. FIXTURE WORK. 27. a. In all cases where conductors are concealed within or attached to gas fixtures,... | |
 | Russell Robb - 1896 - 208 стор.
...equally non-combustible back boards. Jack-knife switches, whether provided with friction or spring stops, must be so placed that gravity will tend to open rather than close the switch. If switches are not mounted on waterproof and noncombustible bases, arcing and heating caused by accidental... | |
 | Earle Abbott Merrilol - 1896 - 232 стор.
...been imparted by the handle. d. Must have carrying capacity sufficient to prevent heating. e. Must be placed in dry, accessible places, and be grouped as far as possible, being mounted—when practicable—upon slate or equally noncombustible backboards. Jackknife switches,... | |
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... b. Must always be placed in dry, accessible places, and be grouped as far as possible. Knife switches must be so placed that gravity will tend to open rather than close the switch. 
