38 



4. Attacliment. 



Fasten cable to barn with nails, staples, clips or metal "dispersers." 

 Caution — Do not use insulators, 



5. Points. 



Number — 30 to 3\J feet apart. 



Location — On ridge, first ones not over five feet from end. 

 On or beside chimneys or cupolas. 

 On dormers. Also on silos. 

 Height — Four to five feet, except those on or beside chimneys, cupolas 

 or similar prominences; these must extend at least eighteen inches 

 above the highest part. 

 Form — Strong tubes, of same weight and material as rods. 



6. Metallic Portions of Structure. 



Eoof-gutters — Top connected to rod, and bottom grounded. 

 Eave-troughs and Conductor-pipes — Free end of eave-troughs connected to 



rod, and conductor pipe grounded. 

 Hay-fork Track — Both ends connected to rod. 

 Tanks — Connected to rod above, grounded below. 

 Windmill — Connected to rod above, shaft grounded below. 

 Metallic Eoof — Grounded at two or four corners, not from peak under 



any consideration. 



Points should be used on the ridge and other prominences. 



7. Wire Fences. 



In field — A grounding at least every twenty rods. 

 In yards — At the four corners. 

 At building — Ground at first post from building. 

 Weight of Groundings — Equal to three No. 12 or one No. 9 wire. 

 How Made — Stapled on posts in contact with all wires of fence, and 

 extending at least three feet in the ground, and projecting above fence. 



8. Shade Trees — Protect where feasible. 



