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British Dictionary definitions for mcb

MCB

abbreviation for
  1. miniature circuit breaker; a small trip switch operated by an overload and used to protect an electric circuit, esp a domestic circuit as an alternative to a fuse
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Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012