Just out of interest, what's the difference between an RCCB and an RCD?
An RCCB is an RCD but not all RCDs are RCCBs.
An RCBO is an RCD but not all RCDs are RCBOs.
RCD is a generic term for these kinds of devices.
I accept one is a subset of the other, but i'm still not clear on wherein the difference lies? With an rcbo for instance it has as I understand it an mcb and rcd combined. Apologies if i'm being dense here.