This guide covers busbar design standards, installation engineering practices, and IEC 61439 requirements, while comparing copper and aluminum options for sizing and selection. Busbar design in switchgear ensures safe, reliable power distribution by balancing current capacity, thermal performance, mechanical strength, insulation, and standards compliance. Ready to Design a Reliable Busbar System? A busbar is a metal bar, usually made of copper or aluminum, that carries. Busbar design within Medium Voltage (MV) switchgear is a critical aspect, fundamentally ensuring the safe, reliable, and efficient operation of power systems. These busbars are not merely simple current conductors; they serve as the strategic backbone, interconnecting various components within the. This Specification covers the design, construction, manufacture, inspection and testing of high-voltage switchboard using gas-insulated vacuum circuit-breaker. Equipment shall comply with the latest version of the relevant International Electrotechnical Commission (IEC) I British Standard (BS) Specifications and Codes of Practice. In most assemblies you will find horizontal main bars, vertical risers, neutral and equipment-ground buses, and purpose-designed. Busbars act as the main current highways inside high voltage switchboards, linking incoming feeders, outgoing circuits, and protective devices in a compact, safe structure.