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A utility pole, commonly referred to as a transmission pole, telephone pole, telecommunication pole, power pole, hydro pole, telegraph pole, or telegraph post, is a column or post used to support overhead power lines and various other public utilities, such as electrical cable, fiber optic cable, and related equipment such as transformers and ...
This San Francisco system was the first case of a utility selling electricity from a central plant to multiple customers via transmission lines. [11] CEC soon opened a second plant with 4 additional generators. Service charges for light from sundown to midnight was $10 per lamp per week. [9] [12]
Date nails are also found on utility poles, sometimes in conjunction with a nail showing the height of the pole in feet. The types of nails may have distinguishing characteristics, such as the date nail having raised digits and the "height nail" having incised digits. The pole height will be a multiple of five (e.g., "35" or "40"). [5]
Rural services normally try to minimize the number of poles and wires. It uses higher voltages (than urban distribution), which in turn permits use of galvanized steel wire. The strong steel wire allows for less expensive wide pole spacing. In rural areas a pole-mount transformer may serve only one customer.
A jin-pole crane can be used to assemble lattice towers. [30] This is also used for utility poles. Helicopters can serve as aerial cranes for their assembly in areas with limited accessibility. Towers can also be assembled elsewhere and flown to their place on the transmission right-of-way. [31]
For a single wood utility pole structure, a pole is placed in the ground, then three crossarms extend from this, either staggered or all to one side. The insulators are attached to the crossarms. For an "H"-type wood pole structure, two poles are placed in the ground, then a crossbar is placed on top of these, extending to both sides.
Knox County won't see a change in how ugly and potentially dangerous utility poles are removed, despite the efforts of one commissioner.. Changes to county code would have required companies like ...
Telegraph lines could be strung on trees, but wooden poles were quickly adopted as the preferred method. The term lineworker was used for those who set wooden poles and strung wire. The term continued in use with the invention of the telephone in the 1870s and the beginning of electrification in the 1890s.