(1) in the switch socket security door should be reliable, open and close flexible, safety door closed should not see internal charged parts, when the 5N of the diameter of the wire into the 1mn, the safety door should not be opened.
(2) The socket with grounding hole can be opened only when the grounding pole plug is inserted first.
(3) rated voltage of $number socket, its insulation should be able to withstand 2000V, 50Hz duration of 1min withstand voltage test without breakdown or flashover.
(4) switch socket manufacturers each product must pass 1.25 times times rated current test, its conductive part temperature rise should not exceed 40K.
(5) The plug from the switch socket to pull the output test should conform to the standard.