| 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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