 | Francis Bacon Crocker - 1901 - 528 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...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... | |
 | Francis Bacon Crocker - 1901 - 514 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... | |
 | Horatio Alvah Foster - 1901 - 1018 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... | |
 | 1902 - 742 стор.
...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... | |
 | Saint Paul (Minn.). - 1908 - 1260 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... | |
 | Henry Charles Horstmann, Victor Hugo Tousley - 1908 - 352 стор.
...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... | |
 | 1908 - 468 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, "Flexmict" Type. Courtayof National Metal Molding Co., Pittsburg, Pa.... | |
 | American School (Chicago, Ill.), American School of Correspondence - 1908 - 220 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.... | |
 | 1909 - 444 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, "Flexduct" Type. Courtesyof National Metal Molding Co., PMsburg, I'a.... | |
 | 1909 - 456 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, "Flexduct" Type. Courtesyof National Metal Mold1n9 Co., PUtsbur9, Pa.... | |
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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... 
