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 94
Fig. 43. Forms of Pina. Cross-Arm 2300-6600 Volts; Pole-Top 2300-6600 Volts;Cross-Arm 10,000-30,000 Volts; Pole-Top 10,000-30,000 Volts foot is sufficient allowance for exposed places, while twenty poundsper square foot is sufficient for lines partially sheltered. Example. What is the pressure, due…
Electrical engineering
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