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Utility pole
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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 over
Utility pole supporting wires for electrical power distribution, coaxial cable for cable television, and telephone cable. Two pairs of shoes can be seen hanging from the wires (center-left, far right).
Utility pole supporting wires for electrical power distribution, coaxial cable for cable television, and telephone cable. Two pairs of shoes can be se
Wooden electricity poles in Germany. In central Europe, lines usually run just straight across fields, rows of poles accompanying roads are quite rare
Wooden electricity poles in Germany. In central Europe, lines usually run just straight across fields, rows of poles accompanying roads are quite rare.
Steel utility pole for low voltage in Gryfów, Poland
Steel utility pole for low voltage in Gryfów, Poland
Typical North American utility pole, showing hardware for a residential 240/120 V split-phase service drop: (A,B,C) 3-phase primary distribution wires
Typical North American utility pole, showing hardware for a residential 240/120 V split-phase service drop: (A,B,C) 3-phase primary distribution wires (mounted on a crossarm), (D) neutral wire, (E) fuse cutout, (F) lightning arrester, (G) single-phase distribution transformer, (H) ground wire to transformer case, (J) "triplex" service drop cable carries secondary current to customer, (K) phone and cable TV wires
Electrical telegraph
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Electrical telegraphy is point-to-point distance communicating via sending electric signals over wire, a system primarily used from the 1840s until the late 20th century. It was the first electrical t
Utility pole
…ceramic insulators was invented and patented by British telegraph pioneer William Fothergill Cooke. Cooke was the driving force in establishing the electrical telegraph on a commercial basis. With Charles Wheatstone he invented the Cooke and Wheatstone telegraph and founded the world's first telegraph company, the…
Cooke and Wheatstone's five-needle telegraph from 1837
Cooke and Wheatstone's five-needle telegraph from 1837
Morse telegraph
Morse telegraph
Hughes telegraph, an early (1855) teleprinter built by Siemens and Halske
Hughes telegraph, an early (1855) teleprinter built by Siemens and Halske
Sömmering's electric telegraph in 1809
Sömmering's electric telegraph in 1809