Hawkins electrical guide. Questions, answers & illustrations; a progressive course of study for engineers, electricians, students and those desiring to acquire a working knowledge of electricity and its applications; a practical treatise (1914)
Hawkins, N. (Nehemiah), 1833- · New York, T. Audel · leaf 84
Figs. 2,223 to 2.226.—Westinghouse indoor, two pole double throw oi! switch for pressuresnot over 6,600 volts. Fig. 2,223, open position; fig. 2,225, closed position. This typeof switch is suited for a wide range of application, being made in both switchboard andwall mounting styles; also for…
Electrical engineering
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