A "double-pole" refers to 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 poles of a circuit, which is essential for safety in certain applications. This is commonly used in 240-volt systems, such as those found in large appliances like dryers and ovens. In addition to its use in residential wiring, the double-pole configuration is also important in industrial settings. It ensures that both the live and neutral wires are disconnected at the same time, preventing electrical hazards. Proper installation and use of a double-pole switch can help protect equipment and users from electrical faults.