International Library of Technology · Scranton, International Textbook Co. · leaf 213
ide street to the trolley wire. This feed tap disappears 56 ELECTRIC RAILWAYS. §21 into the ground just off the avenue and does not show againexcept where it is spliced to the trolley wire. From theside street to the pole it is carried in a tube; it then passesup through the center of the pole to… … Fig. 27. a single track runs along one side of the road. For thisclass of work, cheap gas-pipe brackets are generally used,and since the construction calls for only one pole, whereasa span wire requires two, it is inexpensive. 56. Steel and Wood Poles.—At the present time, thepoles used are either…
Electrical engineering
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