Nish Maroo
This guide is only relevant if you're using the existing light switch and wiring. In the UK, all work should be carried out to BS7671 and Approved Document P of the Building Regulations. It's illegal to do electrical installations in a building without the work being inspected and approved by a Part P registered electrician or a local building control officer being informed beforehand. The replacement of accessories is considered acceptable if done competently. Class 1 equipment (metal fittings that rely on earthing as their protective measure) can only be fitted where there's a reliable earth at the point of installation. In some older installations (approximately pre-1966) you get lighting circuits wired without an earthing facility. On no account should Class 1 equipment be connected to these installations. Contact a qualified electrician. Remember to follow manufacturer's instructions. If you're unsure, get help from a qualified electrician. We recommend you use an NICEIC-registered electrician.
