Earthing Wire : A wire that connects any portion of the earthing system: (a) to another portion of the earthing system; or (b) to a portion of the installation; or (c) to electrical equipment that is required to be earthed
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}