Residual Current Device 1 (RCD) : A device for isolating supply to protected circuits, socket-outlets, or electrical appliances in the event of a current flow to earth that exceeds a predetermined level
Ministry of Business, Innovation and Employment, Glossary of terms and acronyms, Wellington, New Zealand 2010. http://wwwsosh.govt.nz/resources/glossary-u.shtml, (Occupn Hlth and Sfty - Brit) {530}