 | 1891 - 680 стор.
...They are of porcelain, or well-seasoned wood, filled to prevent absorption of moisture. 4. They are so arranged that wires of opposite polarity, with...difference of potential of 150 volts or less, will be kept at least L';iii. apart, and that where a higher voltage is need this distance be increased proportionately.... | |
 | Frank Eugene Kidder - 1892 - 1058 стор.
...coverings of the wire from coming in contact with other substances than the insulating supports. (i> Must be so arranged that wires of opposite polarity,...increased proportionately where a higher voltage is used, unless they are encased in moulding or approved conduit. (d) Must not be laid in plaster, cement, or... | |
 | Frank Eugene Kidder - 1892 - 1032 стор.
...coverings of the wire from coming in contact with other substances than the insulating supports. (1} Must be so arranged that wires of opposite polarity,...volts or less, will be kept apart at least two and one. half inches. (c) Must have the above distance increased proportionately where a higher voltage... | |
 | Earle Abbott Merrill - 1892 - 188 стор.
...3. They are porcelain, or well seasoned wood, filled, to prevent absorption of moisture. 4. They are so arranged that wires of opposite polarity, with...difference of potential of 150 volts or less, will be kept at least two and one-half inches apart, and that where a higher voltage is used, this distance be increased... | |
 | National Electric Light Association. Convention - 1892 - 458 стор.
...They are of porcelain, or well-seasoned wood, filled, to prevent absorption of moisture. 4. They are so arranged that wires of opposite polarity with a difference of potential of 1 50 volts or less, will be kept at least two and one-half inches apart, and that where a higher voltage... | |
 | Charles M. Davis - 1893 - 162 стор.
...coverings of the wire from coming in contact with other substances than the insulating supports. b. Must be so arranged that wires of opposite polarity,...volts or less, will be kept apart at least two and one half inches. c. Must have the above distance ind. Must not be laid in plaster, cement, or similar... | |
 | 1894 - 622 стор.
...well-seasoned wood, filled, to prevent absorption of moisture. 4. Must not be used unless they are so arranged that wires of opposite polarity, with a difference of potential of 190 volts or less, will be kept at least two and one half Inches apart, and that where a higher voltage... | |
 | Richard Henry Pierce - 1896 - 234 стор.
...coverings of the wire from coming in contact with other substances than the insulating supports, b. Must be so arranged that wires of opposite polarity,...similar finish, e. Must never be fastened with staples. IN UNFINISHED LOFTS, BETWEEN FLOORS AND CEILINGS, IN PARTITIONS AND OTHER CONCEALED PLACES:—/'. Must... | |
 | Nehemiah Hawkins - 1896 - 568 стор.
...coming in contact with other substances than the insulating supports. WIRING RULES AND REQUIREMENTS. b. Must be so arranged that wires of opposite polarity,...similar finish. e. Must never be fastened with staples. In Unfinished Lofts between Floor and Ceilings, in Partitions and other concealed Places. f. Must have... | |
 | Earle Abbott Merrill - 1896 - 222 стор.
...coverings of the wire from coming in contact with other substances than the insulating supports. b. Must be so arranged that wires of opposite polarity,...similar finish. e. Must never be fastened with staples. IN UNFINISHED LOFTS, BETWEEN FLOORS AND CEILINGS, IN PARTITIONS, AND OTHER CONCEALED PLACES. /. Must... | |
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... b. Must be so arranged that wires of opposite polarity, with a difference of potential of 150 volts or less, will be kept apart at least two and one-half inches, c. Must have the above distance increased proportionately where a higher voltage is used.... 
