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2. Automobile auxiliary power outlet - Wikipedia

   en.wikipedia.org/wiki/Automobile_auxiliary_power...

   12-volt cigarette lighter receptacle and plug, size A. Receptacle inside diameter: 20.93–21.01 mm (median 20.97 mm) Plug body diameter: 20.73–20.88 mm (median 20.805 mm) Most often used in American automobiles; 12-volt cigarette lighter receptacle and plug, size B. Receptacle inside diameter: 21.41–21.51 mm (median 21.455 mm)

3. Light switch - Wikipedia

   en.wikipedia.org/wiki/Light_switch

   Two light switches in one box. The switch on the right is a dimmer switch. The switch box is covered by a decorative plate. The first light switch employing "quick-break technology" was invented by John Henry Holmes in 1884 in the Shieldfield district of Newcastle upon Tyne. [1]

4. Switch - Wikipedia

   en.wikipedia.org/wiki/Switch

   A toggle switch or tumbler switch is a class of electrical switches that are manually actuated by a mechanical lever, handle, or rocking mechanism. Toggle switches are available in many different styles and sizes, and are used in numerous applications.

5. Multiway switching - Wikipedia

   en.wikipedia.org/wiki/Multiway_switching

   In contrast to a simple light switch, which is a single pole, single throw (SPST) switch, multiway switching uses switches with one or more additional contacts and two or more wires are run between the switches. When the load is controlled from only two points, single pole, double throw (SPDT) switches are used.

6. Electrical wiring in North America - Wikipedia

   en.wikipedia.org/wiki/Electrical_wiring_in_North...

   12/2 Non-metallic (NM) sheathed cable. Most circuits in the modern North American home and light commercial construction are wired with non-metallic sheathed (NM) cable designated type. [9] This type of cable is the least expensive for a given size and is appropriate for dry indoor applications.

7. Automotive lighting - Wikipedia

   en.wikipedia.org/wiki/Automotive_lighting

   The rear registration plate is illuminated either by a single or a pair of yellow or white light(s), affixed within the indentation of the trunk or bumper. It is designed to light the surface of the plate without creating light directly visible to the rear of the vehicle, and must be illuminated whenever the position lights are lit. [11] [23] [118]