How to Install Electric Bells Annunciators And Alarms Including Batteries Wi
How to Install Electric Bells Annunciators And Alarms Including Batteries Wi
Norman H Norman Hugh Schneider
The book How to Install Electric Bells Annunciators And Alarms Including Batteries Wi was written by author Norman H Norman Hugh Schneider Here you can read free online of How to Install Electric Bells Annunciators And Alarms Including Batteries Wi book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is How to Install Electric Bells Annunciators And Alarms Including Batteries Wi a good or bad book?
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No. Feet per Ib. 12 35 18 180 14 55 20 225 16 95 18 135 Joints. Upon the care with which a joint is made much depends, a loose or poorly made joint will offer much resistance to the current. The correct way to start a joint in annunciator, or office, wire is shown in Fig. 22. About three inches of each wire to be joined is bared of its insulation and scraped bright. The ends are then WIRING, CIRCUITS AND TROUBLES 25 bent at right angles to each other, hooked together and one end firmly twisted ...around the other, as shown in Fig. 23. Any projecting pieces are cut off, and the joints should then be soldered to pre- vent corrosion. FIG. 22 FIG. 23 i i i ]////// FIG. 24 Adhesive tape ("friction tape") is wrapped around the joint, Fig. 24, and pressed firmly to- gether so that there is no chance of its unravelling. The tape wrapping should extend across the joint and on to about a half inch of the insulation around each wire. 26 ' ELECTRIC BELLS AND ALARMS Running the Wires. To detail all the opera- tions of installing a complex system of bell, alarm and annunciator wires would be impossible from the reasons that conditions vary and space is lim- ited.
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