You can install it as follows.1. Regular installation of the power supply side terminal as the upper partand the load side terminal as the lower part2. An inclined installation from the regular installation state to eachdirection of 15℃.3. Reverse installation with 180℃ rotated from regular installation (Notapplicable for MSOD-Q* type magnetic starter)4. Installation on the floor5. Installation on the roof (Not applicable for MSOD-Q* type magneticstarter)Besides, you can not install it 90℃ rotated from regular installation.