Where's bus bar using for? Tin Plated Copper Busbar are used in electrical power distribution systems to carry and distribute large amounts of electrical current. They are typically made of copper or aluminum and are used to connect various electrical components such as circuit breakers, transformers, and generators. Bus bars are commonly found in switchgear, distribution panels, and power substations. They provide a low-resistance path for the flow of electricity and help to minimize power losses and voltage drops.