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2. File:Lenovo Thunderbolt 3 Dock 40AC block diagram.svg

   en.wikipedia.org/wiki/File:Lenovo_Thunderbolt_3...

   English: Block diagram of a Thunderbolt 3 dock, showing internal controllers and their functions. The information in this block diagram is derived from several sources: Used controllers: Teardown; JHL6540 DisplayPort limitations: Intel datasheet; DP/HDMI assignment: Tracing and also the Lenovo documentation

3. Three-prong adaptor - Wikipedia

   en.wikipedia.org/wiki/Three-prong_adaptor

   Three-prong plugs do not fit into the older, two-prong receptacles. [7] When used as intended, the ground pin of the 3-wire receptacle is to be connected to a grounded cover screw, or to an external ground. In 1969, Underwriters Laboratories mandated three-prong plugs on major appliances for safety. [7]

4. ThinkPad T series - Wikipedia

   en.wikipedia.org/wiki/ThinkPad_T_Series

   The ThinkPad T series is a line of notebook computers manufactured by Lenovo as part of the ThinkPad family. The T series is officially the flagship ThinkPad product, offering high-performance computers aimed at businesses and professionals. [1] The ThinkPad T series was originally introduced in 2000 and was produced by IBM until 2005.

5. NEMA connector - Wikipedia

   en.wikipedia.org/wiki/NEMA_connector

   The addition is a 3 ⁄ 16-inch (4.8 mm) diameter round or U-shaped ground pin, 1 ⁄ 8 in (3.2 mm) longer than the power blades (so the device is grounded before the power is connected) and located from them by 1 ⁄ 4 in (6.4 mm) edge-to-edge or 15 ⁄ 32 in (11.9 mm) center-to-center.

6. AC power plugs and sockets - Wikipedia

   en.wikipedia.org/wiki/AC_power_plugs_and_sockets

   Ratings of NEMA 5-15 (type B) plug marked on the label (left: 7 A 125 V), engagement face, and IEC 60320 C13 connector at the appliance end of the cord (centre, right: both 10 A 125 V) Plugs and power cords have a rated voltage and current assigned to them by the manufacturer. Using a plug or power cord that is inappropriate for the load may be ...

7. Polarity symbols - Wikipedia

   en.wikipedia.org/wiki/Polarity_symbols

   The adapter typically supplies power to the device through a thin electrical cord which terminates in a coaxial power connector often referred to as a "barrel plug" (so-named because of its cylindrical shape). The polarity of the adapter cord and plug must match the polarity of the device, meaning that the positive contact of the plug must mate ...