Modern electrical construction; a reliable, practical guide for the beginner in electrical construction, showing the latest approved methods of installing work of all kinds according to the safety rules of the National board of fire underwriters (1905)
Horstmann, Henry C[harles], 1858- [from old catalog], Tousley, Victor Hugo, 1875- [from old catalog] joint author · Chicago, F. J. Drake & Co. · leaf 184
ined conduitsmust be at least one thirty-second of an inch in thickness, andsufficiently tenacious to withstand the abrasion of being hauledthrough the metal conduit (Figure 113). The braid or tape required around each conductor in duplex,twin and concentric cables is to hold the rubber insulation… … Figure 114 metal conduits (see No. 49 b), and its thickness must not beless than that specified in the following table: 182 MODERN ELECTRICAL CONSTRUCTION. Nominal Actual Actual Internal Internal External Thickness Diameter. Diameter. Diameter of Wall. Inches. Inches. Inches. Inches. i/« .27 .40…
Electrical engineering
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