Twentieth century hand-book for steam engineers and electricians with questions and answers; a practical non-technical treatise .. (1913)
Swingle, Calvin Franklin, 1846- [from old catalog] · Chicago, F. J. Drake & company · leaf 1379
ix or eight feet in the earth. A more satisfactory method of making a ground is todrive a number of 1-inch iron pipes six or eight feet intothe earth at several points about the station, connectingall these pipes together by means of copper wiie or preferably copper strip. A quantity of salt should… … Fig. 643 HORN GAP INSTALLATION FOR 35,000 VOLT ALUMINUM LIGHTNINa ARRESTERS, SCHENECTADY POWER CO., SHOWING ROOF 12^^- TRANCES TO STATION AND WALL ENTRANCES TO LIGHTNING ARRESTER TOWER. ONE SET OF ARRESTERS DISCONNECTED Lightning Arresters 1351 and also to any water mains^ metaLflumes, or trolley…
