I've been scanning through the changes in the new sans 10142-1:2017 and would like to know where I can get the sans 60309-1 that's got to do with industrial sockets for cooking appliances as its R600 at the sabs. b caught my attention as it requires it to be on earth league protection if I understand it correct? And then there's a NOTE 2 stating that earth connection for three phase coupler needs special consideration. What consideration would it refer to and would it include the industrial socket rated above 16A ? (