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What does MCB stand for?

MCB stands for Main Circuit Breaker

This definition appears frequently and is found in the following Acronym Finder categories:

  • Science, medicine, engineering, etc.

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We have 201 other meanings of MCB in our Acronym Attic

Samples in periodicals archive:

The alarms are hard-wired, so my first stop was the basement, where I switched the main circuit breaker to "off.
If you choose to use a portable generator during a power outage, make sure the main circuit breaker in the electric service panel box is in the OFF position or, in older electric service panel boxes, that the main fuse block is removed.