A double-pole is a type of electrical switch or circuit breaker that controls two separate circuits simultaneously. It has two sets of contacts, allowing it to interrupt the flow of electricity in both the live and neutral wires. This design enhances safety by ensuring that both poles are disconnected when the switch is turned off. Double-pole switches are commonly used in high-voltage applications, such as in 240-volt systems for appliances like electric dryers and water heaters. They help prevent electrical hazards by ensuring that power is completely cut off, reducing the risk of shock or fire during maintenance or repairs.