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 299
se. Such signal circuits asthe above are much less common than those not suited for a 10-ampere current. Telephone, district messenger, private watchmenstime recorders, burglar alarms, and fire-alarm circuits, are nevercapable of carrying 10 amperes continuously and for these a specialprotector is… … /ItAT CO/L ^6ROUNOFig. 135. Circuit Showing Proper Placing of Protecting Devices the signal wires. For telegraph circuits this protector takes the formof a 2,000-volt fuse in each wire. The commoner protector suchas is used on telephone lines should have the following parts mountedon a porcelain or…
Electrical engineering
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