AC Power Plugs and Sockets - Multi-standard Sockets

Multi-standard Sockets

Sockets that take a variety of plug types can be found in various countries where market size or local market conditions make a specific plug standard impractical to implement. These sockets accept plugs fitting various European, Asian, North American and Australian standards. There is also a second multi socket type that accepts British type plugs as well, though these are a lot less common around the world. Since many plug standards are also associated with corresponding voltages, multi-standard sockets do not safeguard against devices being damaged by the wrong voltage. This forces users to be aware of the voltage requirements of their appliances as well as the prevailing local voltage. Some devices are compatible with a wide range of voltages and frequencies.

These sockets have one or more ground holes to allow 3-pin plugs. On properly wired circuits, the ground contact will be connected to earth ground. They may not provide grounding to all types of plugs, as is the case of Schuko or French plugs where the grounding pin that mates with the plug is part of the socket rather than the plug.