... power plants, substations, building hotels, airport terminals, etc., as distribution, electric motors and electric equipment, control, lighting, power conversion ... b) Vertical Bus (branch bus): 50KA; c) Protection of conductors (grounding the main bus): 50KA; d) neutral bus ( ... b) Vertical Bus (branch bus): 105KA; c) Protection of conductors (grounding the main bus): 100KA; d) neutral bus (neutral ...