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MCB, Main Circuit Breaker
A circuit breaker that is the main point of disconnection for a building's electrical supply.
Example usage: The electrician installed a new MCB in the fuse box.
Most used in: Residential and commercial electrical installations.
Most used by: Electricians and other tradespeople working in the electrical industry.
Popularity: 8/10
Comedy Value: 2/10
Also see: MCB, Miniature Circuit Breaker, Miniature Circuit-Breaker, Miniature Circuit Breakers,
What is an MCB in Electrical Construction?
MCB stands for Miniature Circuit Breaker, a device used in electrical wiring installations to protect against overloads and short circuits. It works by automatically switching off the power when too much current passes through the circuit, preventing damage to electrical components and potential fire hazards.
MCBs are typically rated by their current rating in amperes (A), with the most common ratings being 6A, 10A, and 16A. Smaller ratings are also available, ranging from 0.5A to 63A. MCBs are used in both commercial and residential buildings, as well as in industrial and marine applications.
MCBs are a highly effective way to protect electrical installations from overloads and short circuits. According to the United States Fire Administration, electrical fires account for approximately 24% of all reported fires in the United States, highlighting the importance of MCBs in preventing such fires.
The Origin of the Term 'MCB' in Electrician Construction
The term 'MCB' stands for 'miniature circuit breaker'. It is a type of electrical switch used to provide over-current protection of an electrical circuit. The MCB was first developed in the 1950s in Germany, and was first known as a 'Miniatur-Schutzschalter', or miniature protective switch.
The term 'MCB' was first used in the early 1960s in the United Kingdom. It was adopted by the electrical industry in the UK, and quickly spread to other countries. By the 1970s the term was widely used in the electrical industry worldwide.
Today, MCBs are a common component of electrical installations and are used to provide protection against over-currents and short circuits. They are a vital component of modern electrical systems and are used in both residential and industrial settings.
