Cyclopedia of applied electricity : a general reference work on direct-current generators and motors, storage batteries, electrochemistry, welding, electric wiring, meters, electric lighting, electric railways, power stations, switchboards, power transmission, alternating-current machinery, telegraphy, etc. (1916)
American Technical Society · Chicago : American Technical Society · leaf 251
strough serves to separate the wire-way entirely from a wet ceiling andthe sloping surfaces serve to carrythe moisture away from the knobson which the wires are held. TheV-shaped blocks are spaced about4| feet apart and care is taken tomake a close joint where the run-ning boards come together at… … 223 100 UNDERWRITERS REQUIREMENTS
Electrical engineering
Internet Archive · Northeastern University Library · Public Domain Mark 1.0. Free to use for anything.
