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 250
laces, but merelyspecifies for open wiring that only rubber-covered wire be used andthat the separation between wires shall be at least 2| inches forvoltages up to 300 volts (4 inches for higher voltages) and that allwires be kept 1 inch from surface wdred over instead of only | inchas in dry… … Fig. 95. Corroded Rosette Improperly Mounted on Damp Ceiling that water is apt to collect in the pipes and gradually deteriorate theinsulation. This water results from moisture condensed from theair during changes in the temperature and amount of water vaporpresent in the atmosphere. This…
Electrical engineering
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