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 84
ngtubes slanting upward toward the inside. h. Telegraph, telephone and similar wires must not beplaced on -the same cross-arm with electric light or powerwires, and when placed on the same pole with such wiresthe distance between the two inside pins of each cross-armmust not be less than 26 inches.…
Electrical engineering
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
