| 1913 - 242 стор.
...any two wires, of over 3,500 volts, shall be considered as an extra high-potential circuit, and as coming under that class, unless an approved transforming...used, which cuts the difference of potential down to 3,500 volts or less. 47. Primary Wires. a. Must not be brought into or over buildings, except power... | |
| Joseph Gerald Branch - 1913 - 316 стор.
...of over 550 volts and less than 3,500 volts, shall be considered as a high-potential circuit, and as coming under that class, unless an approved transforming...used, which cuts the difference of potential down to 550 volts or less. For 550 volt motor equipments a margin of ten per cent, above the 550 "volt limit... | |
| 1913 - 460 стор.
...of over 550 volts and less than 3,500 volts, shall be considered as a high-potential circuit and as coming under that class, unless an approved transforming...used, which cuts the difference of potential down to 550 volts or less. Similarly if the difference of potential between any two wires is over 3,500 volts... | |
| Dallas (Tex.). - 1914 - 266 стор.
...of over 550 volts and less than 3500 volts, shall be considered as a high potential circuit and as coming under that class, unless an approved transforming...used which cuts the difference of potential down to 550 volts or less. (a) Must be always in plain sight, and never encased except as provided for in Section... | |
| Terrell Croft - 1917 - 446 стор.
...and less than 3,500 volts, shall be considered as a high-potential circuit, and as coming under this class, unless an approved transforming device is used, which cuts the difference of potential down to 550 volts or less. For 550 volt motor equipments a margin of ten per cent above the 550 volt limit... | |
| Harry Cooke Cushing - 1917 - 374 стор.
...volts and less than 3,500 volts, is considered as a highpotential circuit, and as coming under this class, unless an approved transforming device is used, which cuts the difference of potential down to 550 volts or less. For 550 volt motor equipments a margin of ten per cent. above the 550 volt limit... | |
| 1919 - 444 стор.
...of over 550 volts and less than 3,500 volts, shall be considered as a high-potential circuit and as coming under that class, unless an approved transforming...used, which cuts the difference of potential down to 550 volts or less. Similarly if the difference of potential between any two wires is over 3,500 volts... | |
| New York (N.Y.). Board of Aldermen - 1920 - 904 стор.
...between any 2 wires, of over 3,500 volts, shall be considered as an extra-high potential circuit, and as coming under that class, unless an approved transforming...used, which cuts the difference of potential down to 3,500 volts or less; 7. High-potential system, any circuit attached to any machine or combination of... | |
| Terrell Croft - 1920 - 488 стор.
...over 3,500 volts, shall be considered as an extra-high-poteniial circuit, and as coming under this class, unless an approved transforming device is used, which cuts the difference of potential down to 3,500 volts or less. 47. PRIMARY WIRES. 47. Tf7. PRIMARY WIRES. Must not be brought into or over buildings,... | |
| New York (N.Y.) - 1922 - 636 стор.
...any two wires, of over 3,500 volts, shall be considered as an extra-high potential circuit, and as coming under that class, unless an approved transforming...used, which cuts the difference of potential down to 3,500 volts or less. 7. High-potential system. Any circuit attached to any machine or combination of... | |
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