Electrical engineer's pocket-book: a hand-book of useful data for electricians and electrical engineers (1901)
Foster, Horatio A. (Horatio Alvah), 1858-1913 · New York, D. Van Nostrand co.; London, E.& F.N. Spon, ltd. · leaf 608
SWITCHBOARD DEVICES. 595 Switches for low voltage and small current are of the same general form,though differing in details. In the main they consist of a blade of copperhinged at one end between two parallel clips, the other end of blade slidinginto and out of two parallel clips. The clips are… … cross-section of metal of one square inch per 1000 amperes of currentcapacity is as near to the common practice as any, and a contact surface ofat least one inch per 100 amperes or ten times the cross-section of metal isalso common practice, but will depend somewhat on the pressure betweensurfaces.…
Electrical engineering
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
