Method for selecting power from two or more circuits

A method for the selection of power from two or more different circuits, said method comprising the steps of:

• providing a chassis with an electrical chassis receptacle having a plurality of connection points therein for selection of power from said two or more different circuits that are electrically connected to said chassis for the supply of said power thereto;
• providing a duplex element having at least one electrical duplex receptacle thereon for the delivery of power from one of said two or more different circuits to an external device in electrical contact with at least one receptacle, said duplex element additionally having first conductor means therein for electrical connection to selected connection points in said chassis receptacle, said duplex element being connectable to said chassis in different orientations;
• and
• choosing which one of said two or more different circuits is electrically connected to said at least one duplex receptacle by choosing the orientation in which said duplex element is connected to said chassis.