Flexible socket of a power source hub

A power source hub, comprising:

• an input terminal electrically connected to a power source, a plurality of output terminals electrically connected to the input terminal, and each of the output terminals comprising a first electrode, a second electrode and a ground electrode,
• a plurality of cables extending externally of the power source hub, each of the cables having three strands connected to the first electrode, second electrode and ground electrode of the output terminal respectively, and
• a plurality of three-hole sockets electrically connected to the respective cables, wherein
• the three-hole sockets are configured to open in a first direction,
• the three strands of each cable being arranged to extend externally of the power source hub in a second direction substantially perpendicular to the first direction and disposed in a stacked fashion in a plane parallel to the first direction;
• wherein
• each strand of the cables has a section area of at least 1.10 mm2;
• a switch device disposed on the hub to selectively disconnect or connect the power;
• wherein each of the sockets includes a pulling-out device for easy removal of a plug in engagement with the socket, the pulling-out device comprises a lever located above the cable and pivotally mounted on the socket, so that the lever is pivotable to exert a force on the plug to aid in disengaging the plug from the socket.