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The main switch fuse box is there to help prevent electrical fires. If you overload a circuit, and it tries to draw more current than the wire is supposed to have, it will pop the fuse, causing an open circuit, and electricity stops flowing. The main switch allows you to disconnect all electricity coming into the home.
Otherwise, the current would heat the wire to the point where it would burn/melt the insulation, then the bare wires would start the house on fire. Not fun if left unattended.
Wiki User
∙ 12y ago
Wiki User
∙ 11y agoTo turn off or on, all the power in a building.
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The main switch is the over current device that is situated after the utility company's meter base. It could be in the form of a breaker that is situated at the top of a combination panel or an independent fusible switch. This fusible switch holds the fuses that govern the size of the service. When off the switch removes the power from all the circuits that are connected to that service. Some commercial and industrial buildings have more than one service.
Wiki User
∙ 13y agoIt is the main switch in the electrical panel that removes power from the buses, that feed the individual circuit breakers.
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