Three-phase power supply switching unit

A three-phase power supply switching unit, comprising:

• an electrical board on which either a first wiring unit or a second wiring unit is mounted, wherein
• the electrical board has
• an input section to which Y-connection three-phase alternating current or delta connection three-phase alternating current is input, and
• an output section that outputs single-phase alternating current,
• the first wiring unit has
• a first input connection section that is connected to the input section,
• a first output connection section that is connected to the output section, and
• a first wiring that connects the first input connection section and the first output connection section so that Y-connection three-phase alternating current that was input to the input section is output as single-phase alternating current from the output section when the first wiring unit is mounted on the electrical board,
• the second wiring unit has
• a second input connection section that is connected to the input section,
• a second output connection section that is connected to the output section, and
• a second wiring that connects the second input connection section and the second output connection section so that delta connection three-phase alternating current that was input to the input section is output as single-phase alternating current from the output section when the second wiring unit is mounted on the electrical board.