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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. "
Electric Lighting Specifications for the Use of Engineers and Architects - Сторінка 132
автори: Earle Abbott Merrill - 1892 - 176 стор.
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The Electrical Review, Том 8

1891
...accessible places, and grouped a <* possible, being mounted, when practicable, upon slate or ft]*.1 indestructible back boards. Motors. — In wiring for motive power, the same precautions*^ be taken as with the current of the same volume and potent"" 'J lighting. The motor and resistance-...
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The Architect's and Builder's Pocket-book of Mensuration, Geometry ...

Frank Eugene Kidder - 1892 - 911 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...mounted — when practicable — upon slate or equally non combustible back boards. Jack-knife switches, whether provided with friction or spring stops, must...
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Standard Tables for Electric Wiremen: With Instructions for Wiremen and ...

Charles M. Davis - 1893 - 128 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...mounted — when practicable — upon slate or equally non-combustible backboards. Jack-knife switches, whether provided with friction or swing stops, must...
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Electrical Engineer, Том 17

1894
...пате carrying capacity sufficient to prevent heating above the surrounding atmosphere. б. Must be placed In dry accessible places and be grouped,...practicable, upon slate or equally indestructible backboarda. Motor*. 1. In wiling for motive power, the game precautions must be taken aa with the current...
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The Electrical Transmission of Energy: A Manual for the Design of Electrical ...

Arthur Vaughan Abbott - 1895 - 586 стор.
...Must have carrying capacity sufficient to prevent heating above the surrounding atmosphere. 5. Must be placed in dry, accessible places, and be grouped...practicable, upon slate or equally indestructible backboards. 139. MOTORS. 1. In wiring for motive power, the same precautions must be taken as with...
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New Catechism of Electricity: A Practical Treatise

Nehemiah Hawkins - 1896 - 541 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...mounted — when practicable — upon slate or equally non-combustible back boards. Jackknife switches, whether provided with friction or spring stops, must...
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Electric Wiring for the Use of Architects, Underwriters, and the Owners of ...

Russell Robb - 1896 - 183 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...mounted — when practicable — upon slate or equally non-combustible back boards. Jack-knife switches, whether provided with friction or spring stops, must...
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The National Electrical Code: An Analysis and Explanation of the ...

Richard Henry Pierce - 1896 - 222 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...being mounted, when practicable, upon slate or equally non-combustible back boards Jackknife switches, whether provided with friction or spring stops, must...
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Electric Wiring Specifications for Incandescent Lighting

George H. Kimber - 1896 - 59 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...mounted — when practicable — upon slate or equally non-combustible back boards. Jackknife switches, whether provided with friction or spring tops, must...
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Electric Lighting Specifications

Earle Abbott Merrilol - 1896 - 213 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, whether...
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