The general requirements of industrial plug structure is:

(1) the device is easy to wrong and surface should be no burr, flash, and similar to the sharp edge, ensure the safety of operation by hand.

(2) fixed parts with screws or other parts should be easy to see, easy to assemble and fixed.

(3) the user can't change the regional or pole not swap the position of the center line, to ensure correct installation.

(4) set the positioning, ensure the splice position precision.

(5) set up the protection device, prevent after the plug out.

(6) structure should be able to meet the level of protection:

1) rated current, 16, 32, 63 a electrical accessories are splash proof (IP44) and the leaching (IP67) structure.

2) 125 a electrical accessories should be the immersion type (IP67) structure.

3) when the 125 a socket in a shell or with shell integration, is the entire unit can prevent immersion type (IP44) structure.

(7) inverter institutions should have locking mechanism to keep its position, not accidental, it don't damage the cable and wiring.