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 117
ts, of which there are many kinds to be had,may also be used. It is best to arrange the supporting wiresat quite a high angle, otherwise the direct outward pull maybe too great. Some of the older arc lamps are not providedwith insulators, and may be suspended, as shown in the centerof the figure.… … Figure 60must be enclosed on all sides and all v/oodwork protectedwith asbestos board at least one-eighth inch thick. If this method is used with constant potential arc lampscarrying resistance in the hood, it would be well to removeor short-circuit this resistance and locate another in a…
Electrical engineering
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