Quick Answer: Why Do Sockets Have Two Earth Terminals?

Are 2 pin plugs earthed?

2-pole means that the device plug is not earthed and it normally has two pins that transmit electricity.

Originally, all electrical devices were fitted with 2-pole plugs, which means that the devices were not earthed and that all mains sockets were constructed for 2-pole plugs..

Can two Spurs be off one socket?

A spur can be connected to an existing socket, on either a ring main or a radial circuit, providing that socket does not already have a spur. That is only one spur per socket is allowed and the number of spurs must not exceed the number of sockets.

Do you need to connect earth wire?

The “ground” wire is for protection in case of a short circuit of the “phase” (hot) wire to the lamp metallic frame, it will protect you from receiving an electrical shock when touching that frame. It should be connected, but the “no connection” will not interfere in the lamp to go on/off.

Are 2 pin plugs safe?

Note that it is NOT safe to use a two pin plug on a device that requires a safety earth connection. You can change the plug but the ground connection will not carry through the plug.

Can you put 2 earth wires together?

Yes, just connect all the earth wires together in the appropriate terminal.

Do sockets need to be earthed?

There is no requirement to provide an Earth connection from a socket outlet, with an Earth connection, to the box. It’s not technicaly required by the regs providing it’s a modern socket front with continuity through one of the faceplate screws to the fixed lug in the back box.

Can I use 1.5 mm cable for sockets?

The cross sectional area of the earth wire in a 1.5mm cable is 1mm and in a 2.5mm cable it is 1.5mm. This should be sufficient for most domestic socket and lighting circuits.

Do LED lights need an earth wire?

Typically if a fitting has a metal housing and has mains in it, then the metal needs to be earth. Modern LED fittings with an external driver, even if the fitting is metal, would not need an earth wire if the driver is double insulated.

Why is 3 pin plug safer than 2 pin plug?

When connected with an electric circuit, the current flows from the live to the neutral prongs. … 3-pin plugs also limit the amount of power that can flow through the circuit, as compared to a 2-pin plug. Hence 3-pin plugs are safer as compared to 2-pin plugs.

Where does an earth wire go?

What does the earth wire do? Earth wires within your Electrical system usually connect all switches, sockets and any other parts back to where the mains supply and Consumer unit or fuse board is.

What cable do I need for outdoor sockets?

The choice of cable running to the exterior socket should be, as a minimum, 2.5mm2 twin and earth (TWE) housed in conduit, which could be the mini trunking type or a round design.

What Colour is earth wire?

The earth wire will be green and yellow (or sometimes bare in old systems). The live wire is brown in new systems and red in old systems. The neutral wire is blue in new systems and black in old systems.

How do you wire multiple sockets?

Isolate the circuit and use a voltage tester to double check that the existing socket is dead.Unscrew the faceplate of the new socket, feed the cable into the mounting box through a rubber grommet and connect its cores to the faceplate terminals. … Cut the cable and do the same at the existing socket.More items…

What do you do with earth wire if not needed?

If you are using an earthed three core cable with a unit which does not need to be earthed then the earth cable can simply be trimmed back and safely secured using electrical insulation tape.

Why are two pin plugs safe?

This type of connection will prevent you from being electrocuted, but may cause overheating and a fire in the cables if the breaker system is not up to snuff. Option 2 uses two pins, that is no ground connection.