The most common way to install a new power socket is to run a spur cable from an existing socket to connect it to the ring circuit. Unfortunately, this is not always possible.
The IEE Wiring Regulations insist that a spur should not be run from a socket already on a spur, or already supplying a spur.
Additionally, the new socket should not extend the area currently served by the circuit beyond 100 square metres.
If it is possible to run a spur from an existing socket, your electrician will need to assess the restrictions on each main circuit.
A 30/32 amp circuit can supply a maximum 100 square metre area, but since certain rooms, such as kitchens are often heavily loaded, you should avoid using sockets in these rooms to create the spur.
Your electrician will need to calculate the floor area of the circuit and ensure that it complies with regulations.
The process of running the spur involves running 2.5 millimetre cable from the new power socket to an existing socket. Your electrician will need to feed the cables through the mounting box of both sockets and if you’re using metal faceplates, install a short earth core cable.
If this is not possible, your electrician may need to add a spur from your junction box.
This involves connecting cable to the main circuit cable, which can be more disruptive as your electrician will need access to several areas of your home.