Power cords are the electrical hardware used primarily to transfer alternating current (AC) and direct current (DC). Most manufacturers in the electrical industry use copper to manufacture power cords. These copper wires are insulated with a non-conductive material, typically a plastic coating, to protect them.
According to The National Electrical Manufactures Association (NEMA), electrical hardware such as plugs, cords, and sockets must meet specific standards and requirements. This organization sets the required receptacle configuration, cord voltage capacity, and other specifics governing the properties and operation of electrical supplies.
The types of electrical plugs in use worldwide are 15, ranging from Type A to Type O. However, the types used in the US are Type A and Type B.
