International Library of Technology · Scranton, International Textbook Co. · leaf 171
d B should be used. Switch A is placed outside thebuilding, to cut off the current in case of fire, etc. Switch Bis used for starting and stopping the motor. Both theseswitches should be of the quick-break variety, similar tothose used for cutting out sections of arc-light circuits.These switches… … Fig. 1425. REGULATING RHEOSTATS.3812. Rheostats used for regulating the speed by beingplaced in the armature circuit must be designed to carry thecurrent continuously without overheating. These rheostatshave, therefore, to be made much larger than starting boxes,which carry the current for a short…
Electrical engineering
Internet Archive · Boston Library Consortium · Public Domain Mark 1.0. Free to use for anything.
![An illustration from [Electric engineering.], 1902, leaf 171](https://img.insideoutlibrary.com/img/1024/ia-electricengineer02inte-171-78.webp)
