. The Cuba review. Cuba -- Periodicals. THE CUBA REVIEW 25 middle terminal is merely a wire 20 inches in length, held in place by a T connector. The terminals being short offer little re- sistance to the wind. The end of the rods should be sharpened to a point and this point heavily painted to preserve it from rust. Rods should be erected every 18 or 20 feet along the ridge of the roof, but the number depends on the cupolas, chimneys or other points on the roof liable to be struck. These should be connected by a short terminal wire to the main conducting wire by a T. The method of running the
. The Cuba review. Cuba -- Periodicals. THE CUBA REVIEW 25 middle terminal is merely a wire 20 inches in length, held in place by a T connector. The terminals being short offer little re- sistance to the wind. The end of the rods should be sharpened to a point and this point heavily painted to preserve it from rust. Rods should be erected every 18 or 20 feet along the ridge of the roof, but the number depends on the cupolas, chimneys or other points on the roof liable to be struck. These should be connected by a short terminal wire to the main conducting wire by a T. The method of running the horizontal wire around these points is shown in figure 3. Earth Connections. In making earth connections the essential thing is to reach permanently moist earth in the shortest distance from the roof wire. The building in figure 1 has ground con- nections on each side of the building. Two kinds of connections are suggested. One, the ground ends of the vertical wires should be coiled in a spiral having a diameter of about a foot. These spirals should be buried in moist earth under rain spouts or in line of the drip of the roof. This con- struction gives an unbroken run of wire from the ground to the roof of the building. A second suggestion is to drive a galvan- ized water pipe, say an inch and a quarter in diameter, into the ground at the foot of the main conductors. Secure a cap for the top of the pipe and bore a hole through it and insert the wire into the iron pipe, fill- ing it with powdered charcoal. The hole in the cap should be large enough to allow water to pass down into the interior of the pipe. In figure 1 there are but two ground con- nections, one on each side of the building. A larger building means more vertical wires and more ground connections. A building 56 feet long should have at least two con- ductors on each side of the building. Buildings With Metallic Roofs. A metallic roof properly connected to the earth affords a reasonably good protection. When frame
Size: 1323px × 1890px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthormunsonsteamshipline, bookcentury1900, bookdecade1900
