Are devices that allows an electrical current to pass through it for the exclusive purpose of providing power to a device. Power connectors can carry either an alternating current(AC) or direct current (DC) . Power connectors can be categorized into 3groups: electrical connectors: light-duty,medium-duty, heavy-duty . Each category heading refers to how much voltage the connector can handle .Some examples of those connectors, are : AC power plugs and sockets,industrial power plug,DC connector, blade connector, Molex connector and Berg Connector . They complete circuits by joining an electrical component to its power source. Generally, it stands for the junction where the product plugs in to a battery or to a power source in the wall .