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  2. 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.

  3. Cable locator - Wikipedia

    en.wikipedia.org/wiki/Cable_locator

    A cable locator or cable avoidance tool (CAT) is an instrument used for detecting the presence and approximate location of buried services in advance of undertaking excavation works. It aims to avoid accidents while excavating. [ 1 ]

  4. Ground-penetrating radar - Wikipedia

    en.wikipedia.org/wiki/Ground-penetrating_radar

    Reflections from soil layering are also present (dashed lines). Ground-penetrating radar (GPR) is a geophysical method that uses radar pulses to image the subsurface. It is a non-intrusive method of surveying the sub-surface to investigate underground utilities such as concrete, asphalt, metals, pipes, cables or masonry. [1]

  5. Suction excavator - Wikipedia

    en.wikipedia.org/wiki/Suction_excavator

    A suction excavator with vacuum excavation equipment operating in the Netherlands. Depending on the machine used and soil conditions, a 12-inch-square, 5-foot-deep pothole can be completed in 20 minutes or less. [7] Vacuum excavation is sometimes used in conjunction with conventional underground (one-call) locating services.

  6. Kokua Line: When will HECO restore underground lines? - AOL

    www.aol.com/kokua-line-heco-restore-underground...

    Jul. 12—Question : Our neighborhood has underground wiring. In January several houses lost power. HECO responded by putting in above-ground temporary hookups. More than six months later those ...

  7. Murray loop bridge - Wikipedia

    en.wikipedia.org/wiki/Murray_loop_bridge

    The Murray loop bridge is a bridge circuit used for locating faults in underground or underwater cables. [1] [2] It has been used for more than 100 years [3] but is being replaced by the more precise time-domain reflectometer. One end of the faulted cable is connected through a pair of resistors to the voltage source. Also a null detector is ...

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