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  2. 110 block - Wikipedia

    en.wikipedia.org/wiki/110_block

    110 block. A 110 block is a type of punch-down block used to terminate runs of on-premises wiring in a structured cabling system. The designation 110 is also used to describe a type of insulation displacement contact (IDC) connector used to terminate twisted pair cables, [1] which uses a punch-down tool similar to the type used for the older 66 ...

  3. Punch-down block - Wikipedia

    en.wikipedia.org/wiki/Punch-down_block

    Punch-down block. A split-50 M-type 66 block with bridging clips attached. A 110 punch-down block. A punch-down block (also punchdown block, punch block, punchblock, quick-connect block and other variations) is a type of electrical connection often used in telephony. It is named because the solid copper wires are "punched down" into short open ...

  4. Leviton - Wikipedia

    en.wikipedia.org/wiki/Leviton

    Leviton Manufacturing Company, Inc. is an American manufacturer of electrical wiring equipment in North America. It produces electrical light sockets, receptacles and outlets, switches, dimmers and other lighting control systems, wire, power cables, power cords, wall and ceiling occupancy sensors, wall plates, datacom, and other electrical products.

  5. History of AC power plugs and sockets - Wikipedia

    en.wikipedia.org/wiki/History_of_AC_power_plugs...

    An early American electrical plug and socket was invented by Harvey Hubbell and patented in 1904. Hubbell's first design was a socket which screwed into a lampholder (like the early lampholder plugs), but with a separable plug with pins ( U.S. patent 774,250) or blades (US patent 774251).

  6. Second-degree atrioventricular block - Wikipedia

    en.wikipedia.org/wiki/Second-degree_atrio...

    Avoidance of AV-nodal-blocking medication, pacemaker. Second-degree atrioventricular block (AV block) is a disease of the electrical conduction system of the heart. It is a conduction block between the atria and ventricles. The presence of second-degree AV block is diagnosed when one or more (but not all) of the atrial impulses fail to conduct ...

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