| Nehemiah Hawkins - 1896 - 568 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. Jackknife... | |
| Russell Robb - 1896 - 206 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... | |
| George H. Kimber - 1896 - 80 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. Jackknife... | |
| Richard Henry Pierce - 1896 - 234 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 Jackknife switches,... | |
| American Institute of Electrical Engineers - 1897 - 710 стор.
...possible to the point where the wires enter the building, and arranged to cut off the entire current. 6. Must always be placed in dry. accessible places, and...placed that gravity will tend to open rather than to close the switch. c. Must not be single-pole, except when the circuits which they control supply... | |
| Francis Bacon Crocker - 1901 - 528 стор.
...possible to the point where the wires enter the building, and arranged to cut off the entire current. b. Must always be placed in dry, accessible places, and...circuits which they control supply not more than six 10-candle power lamps or their equivalent. d. Where flush switches are used, whether with conduit systems... | |
| Horatio Alvah Foster - 1901 - 1018 стор.
...possible to the point where the wires enter the building, and arranged to cut off the entire current. 6. Must always be placed in dry, accessible places, and...circuits which they control supply not more than six 16-candle power lamps or their equivalent. d. Where flush-switches are used, whether with conduit systems... | |
| 1902 - 738 стор.
...possible to the point where the wires enter the building, and arranged to cut off the entire current. b. Must always be placed in dry, accessible places and...than close the switch. c. Must not be single-pole when the circuits that they control supply devices that require over 660 watts of energy or when the... | |
| George Velten Steeb - 1902 - 230 стор.
...possible to the point where the wires enter the building, and arranged to cut off the entire current, and must always be placed in dry, accessible places, and...gravity will tend to open rather than close the switch. Must not be single pole when the circuits which they control supply devices which require over 660... | |
| 1902 - 750 стор.
...possible to the point where the wires enter the building, and arranged to cut off the entire current Knife switches must be so placed that gravity will tend to open rather than close the switch. They must not be single-pole, except where the circuits which they control supply not more than six... | |
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