OP
davesparks
Fair point, so if it was a socket liable to supply outdoor equipment, would you give it a C2? How would you define that?
In typical IET fashion it was a bit more specific in the green book, but now they have made it less clear in this book! It used to state that bathrooms without supplementary bonding or RCDs are a C2 and that sockets externally or to be used externally are also C2 (if memory serves correctly)
All other sockets requiring RCD but not provided with it were C3.