Because the mains supply has three wires. The Live wire (brown) is the power from the mains. The Neutral (blue) is the return to the mains (completing the circuit). The Earth (green/yellow stripe) - is the 'safety trip'.
Well, if it has 2 male pins, then it is a EU (European) plug. If it has 3 male pins, it is a UK plug.
Need to know voltage and type of plug to answer this question.
A plug with 3 pins which can be inserted into the original UK plug.
3 Pins on an Electric Plug
The plug in pins on most processors are made of gold plated aluminum.
Normally it is so that you connect pins 123 normally, and connect pin 4 to pin 3 or leave it disconnected.
The 3 pin plug is used to connect (and eventually disconnect) various devices requiring an AC power supply to and from the main power supply.As the name suggests, the 3 pin plug consists of three pins :-Longer one, usually on the top for most standard plugs : is the earth [ E ]Left pin (Usually) : is the Line connection [ L ]Right pin (Usually) : is neutral [ N ]Next to the pins, on the plug, the three pins and their respective function is given by E, L and N.
To fit a 3-pin socket. The three pins are live, neutral and earth, which must not be confused.
Not normally, the pins are in a different configuration.
It is safest to use a grounded or earthed plug in a 3-pin outlet. This plug provides an extra prong for grounding, which helps protect against electrical shocks and potential electrical fires. Always ensure that the plug matches the outlet type to prevent any safety hazards.
The plug type used in Japan is Type A, which has two flat parallel pins. This is different from the plug type used in the US, which is Type A or Type B, with two flat parallel pins or two flat parallel pins and a round grounding pin, respectively.
To clean a 3-pin plug, first unplug it from the socket. Use a dry cloth or a small brush to remove dirt and dust from the pins. Avoid using water or liquid cleaners, as this can cause damage to the plug.