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  2. Underground power line - Wikipedia

    en.wikipedia.org/wiki/Underground_power_line

    Above-ground lines cost around $10 per 1-foot (0.30 m) and underground lines cost in the range of $20 to $40 per 1-foot (0.30 m). [10] In highly urbanized areas, the cost of underground transmission can be 10–14 times as expensive as overhead. [11] However, these calculations may neglect the cost of power interruptions. The lifetime cost ...

  3. Magnetic starter - Wikipedia

    en.wikipedia.org/wiki/Magnetic_starter

    A magnetic starter has a contactor and an overload relay, which will open the control voltage to the starter coil if it detects an overload on a motor. [1] [2] The overload relay opens a set of contacts that are wired in series with the supply to the contactor feeding the motor.

  4. Electrical conduit - Wikipedia

    en.wikipedia.org/wiki/Electrical_conduit

    The conduit may be coated to prevent corrosion by incidental contact with concrete. Aluminum conduit is generally lower cost than steel in addition to having a lower labor cost to install, since a length of aluminum conduit will have about one-third the weight of an equally-sized rigid steel conduit. [2]

  5. Reed relay - Wikipedia

    en.wikipedia.org/wiki/Reed_relay

    (from top) Single-pole reed switch, four-pole reed switch and single-pole reed relay. Scale in centimeters. A reed relay [i] is a type of relay that uses an electromagnet to control one or more reed switches.

  6. Magnetic switchable device - Wikipedia

    en.wikipedia.org/wiki/Magnetic_switchable_device

    A magnetic switchable device (often called a magnetic base) is a magnetic fixture that uses one or more permanent magnets in a configuration that allows the external field to be turned on or off. They are used in many applications including optics , metalworking , lifting , and robotics, to attach items to metal surfaces in a secure but ...

  7. Jon Gosselin is engaged to girlfriend after 3 years of dating ...

    www.aol.com/news/jon-gosselin-engaged-girlfriend...

    Jon Gosselin has gotten engaged, and one of his daughters celebrated the moment. The former “Jon & Kate Plus 8” star and father of eight proposed to his girlfriend of three years, Stephanie ...

  8. Limit switch - Wikipedia

    en.wikipedia.org/wiki/Limit_switch

    In electrical engineering, a limit switch is a switch operated by the motion of a machine part or the presence of an object. A limit switch can be used for controlling machinery as part of a control system, as a safety interlock, or as a counter enumerating objects passing a point. [1]

  9. Border agents brace for shutdown, work without pay during ...

    www.aol.com/border-agents-brace-shutdown-without...

    Lawmakers on Thursday rejected a deal backed by President-elect Donald Trump to fund swaths of the U.S. government, upping the risk of a partial shutdown heading into the holiday season.. Trump ...

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