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 247
and rigidity. The rigid supporting necessary for open wiring requires underordinary conditions along flat surfaces, supports at least every 4^feet. This distance should be decreased wherever wires are liableto be disturbed especially if the wires are small. The followingcomment is from the Rules of… … Fig. 88. Wiring on Ceiling Showing Use of Strain Insulators machinery may require frequent attention, insulators should be placed everyfew feet, in order to prevent the wires from being displaced by careless orunavoidable blows from workmen. On the other hand, with a high ceilingand no chance of…
Electrical engineering
Internet Archive · Northeastern University Library · Public Domain Mark 1.0. Free to use for anything.
