Hawkins electrical guide. Questions, answers & illustrations; a progressive course of study for engineers, electricians, students and those desiring to acquire a working knowledge of electricity and its applications; a practical treatise (1914)
Hawkins, N. (Nehemiah), 1833- · New York, T. Audel · leaf 44
of drop is not takeninto consideration in the table on page 731. The carr>-ing capacity of Nos. 16 and 18 B. & S. gauge wire isgiven, but no smaller than Xo. 14 is to be used, except as allowed underrules for fixture wiring.— Undemriters Rules. Circular Mils.—The unit of measurement in… … Fig. 810.—Diagram illustrating circular mils. The circular mil is used as a \iiiit of cross sec-tional area in m.easuring -n-ires. It is equal to the area of a circle .001 in. diameter; itsvalue is .0000007854 square inch. In the figure the sum of the areas of the nine smallcircles equals the area…
Electrical engineering
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