Abstract: A mounting arrangement for the interior fit-out of a switch cabinet housing, having an interior fitting rail which is mounted in the interior of a switch cabinet housing along a housing wall of the switch cabinet housing and that has a first mounting plane which extends parallel at a distance from the housing wall, wherein the mounting arrangement has a fitting rail which is mounted on the interior fitting rail and has a second mounting plane which extends parallel at a distance from the first mounting plane.

Abstract: The invention relates to a locking device for a switch cabinet, with a lock door and a secondary door, wherein the secondary door, on a vertical outer edge opposite its hinge side, has a U-profile formed on a door leaf of the secondary door with a receptacle for a lock mechanism of the lock door, which receptacle is offset back relative to the door leaf and which is open towards the door leaf, wherein on an outer free profile side of the U-profile, a swivelling lever of a lock of the secondary door is pivotably mounted about an axis of rotation between an open position and a locking position. Furthermore, a corresponding switch cabinet is described.