Tvåpoliga

Tvåpoliga is a Swedish term used primarily in electrical engineering and installation contexts. It describes devices or circuits that have two independent switching poles, allowing two separate conductors to be opened or closed by a single actuator. The concept is often used to achieve complete circuit isolation and improved safety, especially in equipment that must be fully disconnected for servicing. A two-pole device may switch both live and neutral conductors, while earth/ground is typically not switched.

In practice, two-pole devices include two-pole switches (tvåpoliga brytare), relays (tvåpoliga reläer), contactors with two switching poles, and certain types of circuit breakers or outlets designed for two conductors. The term is usually used in product specifications and installation manuals to distinguish from one-pole devices that interrupt only a single conductor.

Grammatically, 'tvåpoliga' is the plural form of the adjective 'tvåpolig', used before plural nouns. The corresponding singular forms are 'tvåpolig' (en tvåpolig) and 'tvåpoligt' in neuter usage. Related terms include enpolig (one-pole) and fyrpolig (four-pole) to indicate the number of poles in a device.