Twentieth century handbook for steam engineers and electricians, with questions and answers; a practical nontechnical treatise on the care and management of steam engines, boilers and electric machinery (1922)
Swingle, Calvin Franklin, 1846- [from old catalog] · Chicago, F. J. Drake & company · leaf 1407
c-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 vary-ing in direction, so that no great amount of… … ^^^f^^^^^^^^^:^^:^^^^^^^^^^^^^^^ w I Branch
