A BUSBAR serves as a central grounding point for equipment and are constructed from tin-plated copper with factory-installed insulators and mounting brackets. Various sizes and hole patterns are available to suit the specific requirements of your bonding system. Constructed with UL. The supplier offers three options: bare copper (the cheapest), tin-plated (mid-range), or silver-plated (premium). All carry the same rated current. The. To mount a bus bar to an assembly structure, hardware (studs, holes, etc. Mersen offers in-house conductor plating in tin. Bus bar connectors are critical components in electrical power distribution systems, providing secure, low-resistance connections between bus bars and other conductors such as cables and circuit breakers. Different applications require.