Small, Sidney Aylmer, 1876- [from old catalog] · Chicago, F. J. Drake & co · leaf 142
ARRESTERS—AUXILIARY APPARATUS 143 for soldering in ground wire from the arrester. GP 101is a brass coupling for connecting upper and lower sec-tions. (It being more convenient to drive an 8 or 10 feetlength and then couple on another length, than to drivea 16 or 20 feet length.) This brass coupling… … Fig. 59. Ground Plate for Pole Arresters. The pipe may be driven by placing an iron cap on upperend, to protect the threads, or the method used by well-drivers may be used to advantage. This is to start thehole, fill with water and churn the hole to the requireddepth with the pipe. This method is…
Electricity
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