 | Francis Bacon Crocker - 1901 - 528 стор.
...permanently and effectively connected to "earth." TROLLEY WIRES. / Must not be smaller than No. 0 B. & S. copper or No. 4 B. & S. silicon bronze, and must...readily stand the strain put upon them when in use. k. Must have a double insulation from the ground. In wooden-pole construction the pole will be considered... | |
 | George Velten Steeb - 1902 - 230 стор.
...TROLLEY WIRES, RAILWAY POWER PLANTS, LIGHTING AND POWER FROM RAILWAY WIRES.— Trolley wires must be no smaller than No. OB & S. copper, or No. 4 B & S....readily stand the strain put upon them when in use, must have a double insulation from the ground (in wooden pole construction the pole will be considered... | |
 | Arthur Vaughan Abbott - 1904 - 754 стор.
...sheaths of cables must be permanently grounded. Trolley Wires. j. Must not be smaller than No. 0 B. & S. copper or No. 4 B. & S. silicon bronze, and must...readily stand the strain put upon them when in use. k. Must have a double insulation from ground. In wooden-pole construction, the pole will be considered... | |
 | Henry Charles Horstmann, Victor Hugo Tousley - 1908 - 352 стор.
...be used. Trolley Wires. /. Must not be smaller than No. 0 B. & S. gage copper or No. 4 B. & S. gage silicon bronze, and must readily stand the strain put upon them when in use. k. Must have a double insulation from the ground. In wooden pole construction the pole will be considered... | |
 | Joseph Gerald Branch - 1913 - 316 стор.
...jurisdictionTrolley Wires. j. Must not be smaller than No. 0 B. & S. gage copper or No. 4 B. & S. gage silicon bronze, and must readily stand the strain put upon them when in use. k. Must have a double insulation from the ground. In wooden pole construction the pole will be considered... | |
 | Terrell Croft - 1917 - 446 стор.
...WIRES. 12t. If/. TROLLEY WIRES. Must not be smaller than No. 0 B. & S. gage copper or No. 4 B. & S. gage silicon bronze, and must readily stand the strain put upon them when in use. I2j. f/. TROLLEY WIRES. Must have a double insulation from the ground. In wooden pole construction... | |
 | Terrell Croft - 1920 - 488 стор.
...WIRES. 12i. 1f7. TROLLEY WIRES. Must not be smaller than No. 0 B. & S. gage copper or No. 4 B. & S. gage silicon bronze, and must readily stand the strain put upon them when in use. 12j. 1f/. TROLLEY WIRES. Must have a double insulation from the ground. In wooden pole construction... | |
 | 1921 - 1066 стор.
...Electrical Code. 12-«. — Must not be smaller than No. OB & S. gauge copper or No. 4 B. & S. gauge silicon bronze, and must readily stand the strain put upon them when in use. 12-7". — Must have a double insulation from the ground. In wooden pole construction the pole will... | |
 | 1891 - 738 стор.
...smaller than So, 0 B. & S., copper, or Xo, 4 RA S.. silicon bronze, and must readily stand tbe strain pat upon them when in use. 2. Well insulated from their supports, and in case of the side or double-pole construction, the supports shall also be insulated from tbe poles immediately outside the... | |
 | Calvin Franklin Swingle - 1906 - 488 стор.
...used. Trolley Wires. j. Must not be smaller than No. o B. & S. Gauge copper or No. 4 B. & S. Gauge silicon bronze, and must readily stand the strain put upon them when in use. k. Must have a double insulation from the ground. In wooden pole construction the pole will be considered... | |
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Must be capable of being disconnected at the power plant, or of being divided into sections, so that, in case of fire on the railway route, the current may be shut off from... 
