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Книги Книги 1 - 9 з 9 у All multiple arc low potential systems (300 volts or less) must be provided with....
" All multiple arc low potential systems (300 volts or less) must be provided with an indicating or detecting device, readily attachable, to afford easy means of testing where the station operates continuously. c. Data obtained from all tests must be preserved... "
Electric Lighting Specifications for the Use of Engineers and Architects - Сторінка 120
автори: Earle Abbott Merrill - 1892 - 176 стор.
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The Electrical Review, Том 8

1891
...large size. 5. So constructed as not to maintain an arc after the discharge is passed. Tenting. — All series and alternating circuits must be tested...potential and method of operation. All multiple arc low-potential systems (300 volts or less) must be provided with an indicating or detecting device,...
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Standard Tables for Electric Wiremen: With Instructions for Wiremen and ...

Charles M. Davis - 1893 - 128 стор.
...d. Must be so constructed as not to maintain an arc after the discharge has passed. 7. TESTING. a. All series and alternating circuits must be tested...in view of the potential and method of operation. b. All multiple-arc low-potential systems (300 volts or less) must be provided with an indicating or...
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Electrical Engineer, Том 17

1894
...size. 6. Must be so constructed as not to maintain an arc after the discharge has passed. Tetting. All series and alternating circuits must be tested...operation. All multiple arc low potential systems (300 volte or lees) must be provided with an indicating or detecting device, readily attachable, to afford...
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Electric Wiring for the Use of Architects, Underwriters, and the Owners of ...

Russell Robb - 1896 - 183 стор.
...the discharge current will go to the earth without damage in some unlooked-for place. 7. Testing : a. All series and alternating circuits must be tested...in view of the potential and method of operation. 6. All multiple-arc low-potential systems (300 volts or less) must be provided with an indicating or...
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New Catechism of Electricity: A Practical Treatise

Nehemiah Hawkins - 1896 - 541 стор.
...d. Must be so constructed as not to maintain an arc after the discharge has passed. 7. TESTING : a. All series and alternating circuits must be tested...in view of the potential and method of operation. b. All multiple arc low potential systems (300 volts or less) must be provided with an indicating or...
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New Catechism of Electricity: A Practical Treatise

Nehemiah Hawkins - 1896 - 541 стор.
...operation, to discover any leakage to earth, abnormal in view of the potential and method of operation. b. All multiple arc low potential systems (300 volts...readily attachable, to afford easy means of testing whef e the station operates continuously. c. Data obtained from all tests must be preserved for examination...
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Electric Wiring for the Use of Architects, Underwriters, and the Owners of ...

Russell Robb - 1896 - 183 стор.
...earth, abnormal in view of the potential and method of operation. b. All multiple-arc low-potential systems (300 volts or less) must be provided with...afford easy means of testing where the station operates continuously. c. Data obtained from all tests must be preserved for examination by insurance inspectors....
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Electric Lighting Specifications

Earle Abbott Merrilol - 1896 - 213 стор.
...d. Must be so constructed as not to maintain an arc after the discharge has passed. 7. TESTING:— must be tested every two hours while in operation,...in view of the potential and method of operation. 6. All multiple arc low potential systems (300 volts or less) must be provided with an indicating or...
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The National Electrical Code: An Analysis and Explanation of the ...

Richard Henry Pierce - 1896 - 222 стор.
...earth, abnormal in view of the potential and method of operation. b. All multiple arc low-potential systems (300 volts or less) must be provided with...readily attachable, to afford easy means of testing. < Data obtained from all tests must be preserved for examination by insurance inspectors These rules...
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