The Neutrik Powercon series of connectors provide a compact yet rugged solution for power connections. A uniquely keyed insert prevents then being used in wrong sockets and a twist-lock system keeps them in place in use. These are increasingly used in professional sound and lighting applications.
The connectors are rated to 20A and are available in blue bodies, denoting a power inlet, and grey bodies, denoting a power outlet (or through) connection. These connections are not suitable for situations where disconnection under load would occur. For this, the Powercon True-1 system should be used.