"Andy Wade" wrote in message
...
snip

Slightly later than that I think. The big change was the coming of
"Council Directive of 19 February 1973 on the harmonization of the laws
of Member States relating to electrical equipment designed for use
within certain voltage limits (73/23/EEC)" - generally known as the
low-voltage directive (LVD). The UK implementation was the Electrical
Equipment Safety Regulations of 1973, subsequently revised in 1975, 1989
and 1994.


Was that the same set of regulations that changed the colour code for non
hard wired cable ?