Thanks, Trumpy. Cold where you are? Its about 17 degrees here. Another thing that I have noticed on older Clipsal plugs (end of bakelite/beginning of PVC plugtops such as the old part numbers 401s, 417s 423s & early 439s)was the way the pins were made with a 'notch' in the end. was this done to save material or just a manufacturing or design 'feature'?
#141284 - 07/13/0408:12 AMRe: Little hole on British plugs
I always assumed that this feature was to provide a signal earth/ground for a radio, I have used it more recently in the UK, (with an olde plugge LOL) to obtain an ESD earth for working on PC parts.. yes, I know, could be nasty if the earth isn't connected on that socket, I used to carry a 13A socket tester too. I don't think it was to save material though, some method of connecting to the earthing system would be the obvious reason, and old radios dating from this period often used 2 wire cords with a requirement for a signal ground... I guess they allowed you to connect to it for this purpose without the earth wire coming near the live wires in the plug?
#141287 - 07/21/0405:25 AMRe: Little hole on British plugs