Power switching device

A power switch comprising:

• a communication unit communicably connected to an external device;
• a relay configured to open and close a power line supplying electric power from a power source to a load;
• a control unit configured to control the relay based on information received from the external device via the communication unit;
• and
• a housing configured to accommodate the communication unit, the relay, and the control unit,
• wherein the housing includes a first chamber and a second chamber separated from the first chamber by a partition wall,
• the first chamber is disposed with a first substrate, the first substrate being mounted with the relay and constituting a part of the power line, and
• the second chamber is disposed with a second substrate, the second substrate including the communication unit and at least a part of the control unit and being connected to the first substrate.