PDU testing apparatus

A power distribution unit (PDU) testing apparatus comprising:

• a main power plug and a plurality of branch power plugs;
• a main switch and a plurality of branch switches which are single-pole double-throw switches each comprising a pole, a first throw, and a second throw;
• and
• a plurality of loads;
• wherein a first terminal of the main power plug is connected to the first throw of the main switch, the second throw of the main switch is idle, the pole of the main switch is connected to the second throws of the plurality of branch switches, the first throws of the plurality of branch switches are respectively connected to first terminals of the plurality of branch power plugs, second terminals of the plurality of branch power plugs are connected to a second terminal of the main power plug, the poles of the plurality of branch switches are respectively connected to first terminals of the plurality of loads, second terminal of the plurality of loads are connected to the second terminal of the main power plug.