master switch

A master switch is a type of electrical switch that controls power to two or more circuits in an electrical system.

References - master switch

See the following for additional master switch information:

Outdoor Electrical Safety Check - Tips For The Safe Outdoor Use Of Electricity United States Federal Citizen Information Center, December 2009, Editorial Staff
Construction Site Work, Site Utilities and Substructures Databook McGraw-Hill Professional; 1 edition, May 2001, Sidney M. Levy, ISBN 71360212
NFPA's Residential Wiring Jones & Bartlett Publishers; 3 edition, December 2008, H.B. Stauffer, P.A. Rosenbuerg, ISBN 763752606
Electrical Wiring Residential Delmar Cengage Learning; 16 edition, December 2007, Ray Mullin, ISBN 1418050954
Modern Residential Wiring: Based on the 2005 NEC Goodheart-Wilcox Publisher, April 2006, Harvey Holzman, ISBN 1590704436