Walther Electric is the originator of IEC 309-1/2 Circular Power Connectors.  Today, Walther is one of the leading manufacturers of these devices in the world. 

 

The intermateability specification allows Walther products to mate with other manufacturer's devices that meet the same standard, IEC 309-1/2.  This is also a safe device in that it is sized by amperage (16, 32, 63 and 125 International, 20, 30 60 and 100 US of A) and voltage is keyed in relation to the first mate, last break ground pin.

 

This offers the safety that is required when plugging unloaded devices into sockets.  Providing the wiring is done according to codes, the mating pair will always be of correct voltage and amperage.  By adding interlocks, this device is made even safer.

                                                                                                                      

 

Walther Electric's "HIBACHI" Electron Power Distribution units can be custom made to your specifications.