Based on the IEC61439-1, Table 2, the minimum creepage distance for 800V is 12. Busbar distance calculation is a critical part of electrical power system design because it directly influences safety, thermal performance, insulation coordination, and equipment reliability. The bus bar clearance in Blockset column maintained is ≥ 8mm where NSX/CVS used. It requires consideration of voltage levels, environmental conditions, and manufacturing processes, adherence to relevant standards, and optimization through simulation. The bus bars are mounted inside the panel via 1. 25" tall insulator mounts. The first is clearance, or the distance through air between conductors of opposite polarity or between an energized conductor and ground.