This page describes how to wire and cable telephone sockets in the UK only. As with all electrical work, if you are not trained or experienced in such matters, then the advice is to seek the expertise of a professional. Sockets can only be installed on the new plug and socket system. I...
since alocal earth rodis not usually a sufficiently goodearthon its own to clear all earth faults. SoRCDsare used on all circuits even in older installations. A common option is to have the supply fed through a100mA time delayed RCD, the output of which goes to a splitCUwithRCDon...