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Size, Shape and Colour of 3 pin plug, Size, Shape and Colour of 2 pin plug…
Size, Shape and Colour of 3 pin plug
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Size
The plug itself is 4.3 x 4 x 1.4 cm. The central earth pin is 4 by 8 mm and 22.7 mm long, while the line and neutral pins are 4 by 6.35 mm and 17.7 mm long, on centres spaced 22.2 mm apart.
Colour
Only the colours black and white are government approved. The colour black can absorb heat therefore lowering the risk of it heating up. The colour white is used for devices that don't heat up exceedingly.
Size, Shape and Colour of 2 pin plug
Shape
The head is triangular in shape, with two pins sticking out of the top of the head
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Colour
It's black, because these types of plugs generate a lot of heat so the color black will absorb the heat
Size, Shape and Colour of USB plug
Shape
These connectors do have some physical differences that allow you to tell them apart. USB Type-C has an oblong-shaped plug and is slightly bigger than Micro-USB. It can be inserted either side up. Micro-USB can only be plugged in one way and has two hooks at the bottom to hold the cable in place.
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Colour
USB 1.0 and 2.0 ports and plugs can be white or black. USB 3.0 ports and plugs are blue. USB 3.1 ports and plugs are teal blue. USB sleep-and-charge ports are often yellow, orange, or red.