Thorsman Radiator Earth Clamps As used under 16th edition wiring regulations. For making a reliable earth connection to radiators and other metalwork as required. Complete with crimp eyelets, clamp, and warning label. The ring terminal on the clamp takes a wire size of 4.0 - 6.0mm2. This unique and highly versatile clamp set is being specified as a means of solving a wide range of earthing problems.  Easy to install and re-instate. Conforms to the requirements of IEE Wiring Regulations.