Neutral Conductor 3 : In multiphase circuits, the conductor used to carry unbalanced current. In single-phase systems, the conductor used for a return current path.
Young & Company Electric Power Products and Related Engineering Services, Glossary of Electrical Terms, http://www.youngco.com/young2.asp?ID=4&Type=3, CA., USA 2001. (Electr Sfty - Amer) {514}