Abstract: A bus bar structure includes a bus bar disposed to extend along an outer surface of a housing of an electrical device; and a non-conductive lower cover provided to extend along the bus bar to cover a first surface of the bus bar, the first surface facing the outer surface. The lower cover includes a first hole portion that allows insertion of a fixing member configured to fix the lower cover at a first position on the outer surface, the first hole portion having a major axis extending along a first direction of the housing. The bus bar includes a second hole portion that allows insertion of a connection member configured to electrically connect the bus bar to a terminal at a second position on the outer surface, the second hole portion having a major axis extending along a second direction that intersects the first direction.