Twentieth century handbook for steam engineers and electricians, with questions and answers; a practical nontechnical treatise .. (1916)
Swingle, Calvin F. (Calvin Franklin), b. 1846 · Chicago, F.J. Drake & company · leaf 1407
ring ordinarily cause more trouble than anything else on elec-tric light or power circuits, but with the three wire system,the neutral wire is often grounded. Grounds on this wireare less objectionable than on other wires, because it car-ries very little current, and that current is constantly… … ^f^^^^^^^^^^^^ Branch ■X Circuits^ m Fig. 657
