Modern electrical construction; a reliable, practical guide for the beginner in electrical construction, showing the latest approved methods of installing work of all kinds according to the safety rules of the National board of fire underwriters (1905)
Horstmann, Henry C[harles], 1858- [from old catalog], Tousley, Victor Hugo, 1875- [from old catalog] joint author · Chicago, F. J. Drake & Co. · leaf 65
that twogrounds occur on the system at thesame time. An engineer or dynamotender will soon learn what the in-sulation resistance of the plant in hischarge should be and be governed ac-cordingly. A diagram of a direct currentground detector switch is shown inFigure 31. By throwing switch Adown the —… … MOTORS 63 (never to a gas pipe) or to some grounded part of thebuilding. If no good ground is obtainable one may bemade as described under 13 A. 8. Motors. a. Must be thoroughly insulated from the ground whereverfeasible. Wooden base-frames used for this purpose, andwooden floors which are depended…
Electrical engineering
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