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It depends.
Usually the 'biggest' pin on a mains plug is the Ground connection, the other two being Hot and Neutral - but not being familiar with all the world's plug standards and what one may call 'bigger' this may not be accurate.
For example, here in the US, a mains plug uses two flat parallel blades and a round pin for Ground. The pin is slightly longer than the two blades, but many would not call it 'bigger'.
Other than that, mains plugs all have three connections - Hot, Neutral and Ground. The Ground is usually longer, so it will connect first insuring the device is grounded as it's plugged in and when power is applied.
Another AnswerFor countries that use UK-style plugs, the longest pin is the earth (ground) connector, and is longer to enable it to (a) open the protective shutters in the socket, and (b) to ensure the load is earthed before applying power. (The protective shutters prevent kids from sticking anything into the socket and electrocuting themselves).
What else can I help you with?
What does the third prong ion a three prong pulg do?
The 3rd round plug is the ground connection.
What must be fitted to a cable of a radio before it can be connected to the mains electricity supply?
Before a radio can be connected to the mains electricity supply, a suitable plug must be fitted to the cable. This plug should be compatible with the electrical standards of the region, ensuring proper voltage and current ratings. Additionally, it's important that the plug has the necessary safety features, such as fuses, to protect against electrical faults.
How many volts does a mains plug use?
This completely depends on whereabouts you live. For example: In the UK = 230 V In the USA =120 V It is less in the USA because they think it is safer, this is nonsense because anything over 60 volts will kill you. As in the US and Canada, UK sockets have three contacts: line, neutral, and protective conductor (earth). The line and neutral contacts are protected from interference by the use of shutters that are opened by the plug's earth pin.
Can I plug my 2 prong Christmas light cord into a 3 prong extension cord?
UK answer only: Yes but you need a three-pin to two-pin adaptor. Alternatively fit a three-pin plug to the light and leave the earth pin disconnected. This can only be done if the lamp already has a two-wire cable fitted to it, anything else is potentially dangerous.
Which blade is the longest in a 3 pin plug?
The ground blade is the longest in a three blade plug.
When you use a three pin plug what is the third biggest pin for?
Would that be the smallest pin. To answer this question the specifications of the plug will be needed.
When use a 3-pin mains plug what is the biggest pin for?
On a UK three pin plug the two smaller prongs are Live (brown) and Neutral (blue). The Larger pin is for the Earth wire. This can prevent you getting an electric shock
Why are there 3 pins to the plug?
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'.
Why does a plug have three wires?
The third prong on the bottom of the plug is for "grounding," in case of a short.
Does the PS3 have a fuse?
Yes it has in the plug that you put into the mains.
Where is the power on switch for my Toshiba laptop?
The switch is internal. If you plug into the mains, power will be supplied by the mains and the battery will begin charging. If you unplug from the mains, the battery takes over.
What do you use to make a lamp or a fitting light up?
mains plug
Can you plug in a 240v-50Hz 2.8kW oven into the mains socket or does it have to be hardwired into a spur?
Yes it can be plugged in with a 13A plug.
What do you use to make a light or lamp fitting light up?
mains plug
What do you use to make lamp or light fitting light up?
mains plug
What does the third prong ion a three prong pulg do?
The 3rd round plug is the ground connection.
Where is the PS vita charger?
The Vita's charger comes in the box. It is in two parts - one with a mains plug and adaptor, the other has a USB plug and one to fit into the Vita. You can use the latter to charge directly from a PC, or both together to charge from the mains.
