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  2. Underground power line - Wikipedia

    en.wikipedia.org/wiki/Underground_power_line

    An underground power line provides electrical power with underground cables. Compared to overhead power lines, underground lines have lower risk of starting a wildfire and reduce the risk of the electrical supply being interrupted by outages during high winds, thunderstorms or heavy snow or ice storms. An added benefit of undergrounding is the ...

  3. Utility location - Wikipedia

    en.wikipedia.org/wiki/Utility_location

    Utility locating is the process of identifying and labeling public utility mains that are underground. These mains may include lines for telecommunication , electricity distribution , natural gas , cable television , fiber optics , traffic lights , street lights , storm drains , water mains , and wastewater pipes.

  4. List of metro systems - Wikipedia

    en.wikipedia.org/wiki/List_of_metro_systems

    As of 22 December 2024, 204 cities in 65 countries operate 891 metro lines. The London Underground first opened as an underground railway in 1863 and its first electrified underground line, the City and South London Railway , opened in 1890, [ 1 ] making it the world's first deep-level electric metro system. [ 2 ]

  5. Utility tunnel - Wikipedia

    en.wikipedia.org/wiki/Utility_tunnel

    A utility tunnel, utility corridor, or utilidor is a passage built underground or above ground to carry utility lines such as electricity, steam, water supply pipes, and sewer pipes. Communications utilities like fiber optics, cable television, and telephone cables are also sometimes carried.

  6. Cable locator - Wikipedia

    en.wikipedia.org/wiki/Cable_locator

    Different cable locators employ different methods to function. The two known methods, Passive Utility Detection locating naturally present or naturally produced signals known as a passive signal. The other is to locate a signal that is applied AKA an Active signal , [7] are called the Passive Utility Detection and Active Utility Detection.

  7. Powerline river crossings in the United Kingdom - Wikipedia

    en.wikipedia.org/wiki/Powerline_river_crossings...

    The North Eastern Electricity Board had planned a transmission line from Blyth to Teesside in 1958; Jarrow Borough Council wanted the cables to go underground. [41] It was part of the 50-mile Blyth to Lackenby 275kV line. [42] The transmission line was built around December 1961. [43] The crossing was rebuilt from 4 November 1962. [44]

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  9. Low-voltage network - Wikipedia

    en.wikipedia.org/wiki/Low-voltage_network

    In 240 V systems, the customers are served by several low-voltage feeders, realized by overhead power lines, aerial or underground power cables, or their mixture; in an overhead network, service drops are drawn from pole tops to roof connections. In a cable network, all necessary connections and protection devices are typically placed in pad ...

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