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Книги Книги 1 - 10 з 23 у ... a highpotential circuit and as coming under that class, unless an approved transforming....
" ... a highpotential circuit and as coming under that class, unless an approved transforming device is used which cuts the difference of potential down to 550 volts or less. "
Agents' and Inspectators Pocket-book of Fire Protection - Сторінка 83
автори: George Velten Steeb - 1902 - 218 стор.
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Electric Wiring for the Use of Architects, Underwriters, and the Owners of ...

Russell Robb - 1896 - 183 стор.
...length of time the current that will flow through them. CLASS B. HIGH-POTENTIAL SYSTEMS. OVEK 300 VOLTS. Any circuit attached to any machine, or combination of machines, which develops over 300 volts difference of potential between any two wires, shall be considered as a high-potential...
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Transactions, Том 14

American Institute of Electrical Engineers - 1897
...writing from the Inspection Department having jurisdiction. HIGH-POTENTIAL SYSTEMS. 300 TO 3,000 VOLTS. Any circuit attached to any machine or combination...difference of potential, between any two wires, of over joo volts and less than 3,000 volts, shall be consider, d as a hi h potential circuit, and as coming...
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Transactions of the American Society of Mechanical Engineers

American Society of Mechanical Engineers - 1898
...maker's name and the normal capacity in volts and amperes. LOW-POTENTIAL SYSTEMS. 300 VOLTS OR LESS. Any circuit attached to any machine, or combination...difference of potential, between any two wires, of over ten volts and less than 300 volts, shall be considered as a low-potential circuit, and as coming under...
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Distributing system and lamps

Francis Bacon Crocker - 1901 - 505 стор.
...dynamo be used for both purposes. HIGH-POTENTIAL SYSTEMS. 550 TO 3,500 VOLTS. Any circuit at t ached to any machine, or combination of machines, -which...difference of potential, between any two wires, of over 300 volts and less than 3,500 volts, shall be considered as a high-potential circuit, and as coining...
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Electrical Engineer's Pocket-book: A Hand-book of Useful Data for ...

Horatio Alvah Foster - 1901 - 987 стор.
...name and the normal capacity in volts and amperes. JLOW rOTEWTIAI, SYSTEMS. 550 VOLTS OR LESS. Jny circuit attached to any machine, or combination of...which develops a difference of potential, between any tied wires, of over t<-n volts and less than 550 rolls, shall be considered as a low-potential circuit,...
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International library of technology: a series of textbooks for ..., Том 13

International Textbook Company - 1902
...For pressures over 550 volts, the following rules apply : HIGH-POTENTIAL SYSTEMS. 550 TO 3,500 VOLTS. Any circuit attached to any machine or combination...and less than 3,500 volts shall be considered as a highpotential circuit and as coming under that class, unless an approved transforming device is used...
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International Library of Technology: A Series of Textbooks for Persons ...

1902
...For pressures over 550 volts, the following rules apply: HIGH-POTENTIAL SYSTEMS. 550 TO 3,500 VOLTS. Any circuit attached to any machine or combination...between any two wires of over 550 volts and less than 8,500 volts shall be consider cd as a highpotential circuit and as coining under that class, unless...
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Electric Lighting: The generation plant

Francis Bacon Crocker - 1904
...point of view. If we look upon the question in its relation to fire risk or insurance, we find that ' ' any circuit, attached to any machine or combination...difference of potential, between any two wires, of over'10 volts and less than 550 volts shall be considered as a low-potential circuit." This statement...
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Electric Lighting: Distributing system and lamps

Francis Bacon Crocker - 1904
...for both purposes. HIGH-POTENTIAL SYSTEMS. 5o0 TO 3,500 VOLTS. Any circuit attached to any niachine, or combination of machines, which develops a difference of potential, between any two wires, of over 3O0 volts and less than 3,500 volts, shall be considered as a high-potential circuit, and as com ing...
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The generating plant

Francis Bacon Crocker - 1904
...low-potential systems. An extra-high-potential system is defined by the National Electrical Code to be one ' ' which develops a difference of potential, between any two wires, of over 3500 volts. " It is not allowable to bring it into buildings except power or sub-stations, unless the...
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