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" ... except that if the difference of potential between the wires is not over 300 volts, and if the wires are not exposed to moisture, they may be fished... "
Agents' and Inspectators Pocket-book of Fire Protection - Сторінка 82
автори: George Velten Steeb - 1902 - 218 стор.
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Electric Lighting: A Practical Exposition of the Art, for the Use of ..., Том 2

Francis Bacon Crocker - 1901
...single or twin conductors (see No. 48) may be used where the difference of potential between wires is not over 300 volts, provided it is installed without...potential between wires is not over 300 volts, and if wires are not exposed to moisture, they may be fished on the loop system if separately incased throughout...
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Distributing system and lamps

Francis Bacon Crocker - 1901 - 505 стор.
...conductors (see No. 48) may be used where the difference of potential between wires is not over 3(X) volts, provided it is installed without joints between...difference of potential between wires is not over 900 volts, and if wires are not exposed to moisture, they may be fished on the loop system if separately...
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Electrical Engineer's Pocket-book: A Hand-book of Useful Data for ...

Horatio Alvah Foster - 1901 - 987 стор.
...single or twin conductors (see No. 48) may be used where the difference of potential between wires is not over 300 volts, provided it is installed without...all fittings and is rigidly secured in place ; or, it' the difference of potential between wires is not over 300 volts, and if wires are not exposed to...
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International Library of Technology: A Series of Textbooks for Persons ...

1902
...or twin conductors may be used where the difference ot potential between conductors is not over 800 volts, provided it is installed without joints between...difference of potential between wires is not over ;!(HI volts, and if the wires are not exposed to moisture, they may be fished on the loop system if...
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Compiled Ordinances of the City of St. Paul, Minnesota

Saint Paul (Minn.). - 1908 - 1245 стор.
...glass or porcelain, an approved armored cable, single or twin conductors (see No. 43) may be used, if it is installed without joints between outlets, and...fittings and is rigidly secured in place, or, if the wires are not exposed to moisture, they may be finished on the loop system, if separately incased throughout...
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Modern electrical construction...

Henry Charles Horstmann, Victor Hugo Tousley - 1908
...conduit, or approved armored cable (see No. 24/)> except that if the difference of potential between the wires is not over 300 volts, and if the wires are not exposed to moisture, they may be fished if separately encased in approved flexible tubing, extending in continuous lengths from porcelain support...
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Cyclopedia of Applied Electricity: A General Reference Work on Dynamo ...

1908
...impossible and impracticable to employ knobs and tubes, provided the difference in potential between the wires is not over 300 volts, and if the wires are not subFig. 17. Flexible Tubing, "Flexmict" Type. Courtayof National Metal Molding Co., Pittsburg, Pa....
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Electric wiring and lighting

American School of Correspondence, Chicago, Charles Edwin Knox, George Carl Shaad - 1908 - 180 стор.
...impossible and impracticable to employ knobs and tubes, provided the difference in potential between the wires is not over 300 volts, and if the wires are not subFig. 17. Flexible Tubing, "Flex<luct" Type. Courtfey of National Metal Molding Co., PUtsburg, Pa....
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Cyclopedia of Heating, Plumbing and Sanitation: Heating and ventilation ...

1909
...impossible and impracticable to employ knobs and tubes, provided the difference in potential between the wires is not over 300 volts, and if the wires are not subFig. 17. Flexible Tubing, "Flexduct" Type. Courtesyof National Metal Molding Co., PMsburg, I'a....
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Cyclopedia of Architecture, Carpentry and Building: Electric wiring ...

1909
...impossible and impracticable to employ knobs and tubes, provided the difference in potential between the wires is not over 300 volts, and if the wires are not subFig. 17. Flexible Tubing, "Flexduct" Type. Courtesyof National Metal Mold1n9 Co., PUtsbur9, Pa....
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