I was not aware of that one - I was aware of it pre-dating the IEC classes but not by more than a decade. (makes the B and D campaign quite late actually - I have since found this amusing read. Double Insulation The Black & Decker Story (PDF) )
Odd perhaps that we did not retain 2 pin sockets, had double insulation been a little earlier, or 13A plugs a bit later, we may well have, as the idea of a compulsory CPC to each socket circuit only really appears in the post war regs. (to be followed less than 30 years later by CPCs in lighting circuits as well.)
I was not aware of that one - I was aware of it pre-dating the IEC classes but not by more than a decade. (makes the B and D campaign quite late actually - I have since found this amusing read. Double Insulation The Black & Decker Story (PDF) )
Odd perhaps that we did not retain 2 pin sockets, had double insulation been a little earlier, or 13A plugs a bit later, we may well have, as the idea of a compulsory CPC to each socket circuit only really appears in the post war regs. (to be followed less than 30 years later by CPCs in lighting circuits as well.)
