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A main switch is a fundamental component in electrical systems, providing a means to control and disconnect the power supply to an entire installation. It ensures safety during maintenance, emergencies, or when power needs to be completely shut off. Main switches come in various types, including main disconnect switches, main circuit breakers, isolator switches, and load break switches, each serving specific functions in managing electrical power distribution. Choosing the right main switch is crucial for maintaining a secure and efficient electrical infrastructure.