![]() Some wall mount power adapters have a similar feature but instead of changing the ac power cord, the ac blades are interchangeable to accommodate different regions or countries. With these products it is possible to connect to different styles of wall sockets (in different regions or countries) by changing the ac power cord to one with the appropriate wall plug configuration. Many products with ac power cords have a standard ac inlet at the product chassis into which the power cord is connected. The maximum current rating for the connectors is also standardized, with different ratings often employing physically different connector contacts such that mis-matched plug and socket combinations cannot be engaged.įor desktop adapters the ac connection is a cord whereas a wall plug adapter will have an integrated plug. Since wall plug voltages are standardized, the ac power connectors are similarly rated to provide sufficient insulation for the standard voltages. Most countries have well defined plug and socket combinations, voltages, and frequencies. ![]() Ac Wall Plugs and CordsĪc wall plug selection is typically straight forward and comes down to two criteria 1) in what regions and/or countries is the power supply intended to be used 2) does the application require two conductors or three conductors. Dc output connectors are much less standardized and thus only a commonly available subset of the connectors will be discussed. Ac wall power connectors are standardized as are the associated voltages and maximum currents, thus the discussion regarding those connectors is greatly simplified. This discussion will instead focus on single phase ac-dc wall plug and desktop power supplies with ac wall plugs (input) and dc power connectors (output). ![]() The broad range of connectors available for input and output power transfer could not be reasonably covered in a single document. Power supplies have both input and output voltages and thus often have associated input and output connectors.
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