csearle wrote:Not quite as simple. What is typically referred to as an RCD¹ has no overload protection. An RCBO does.SteelCamel wrote:An RBCO is simply an RCD in the same package as an MCB.
Chris
¹ More accurately an RCD is a general term for any device with residual current protection, e.g. RCCBs, RCBOs, etc. (see BS7671), but colloquially it tends to get used just for RCCBs
Which is what I said. An RCD (or to be more precise as you say, RCCB) detects leakage to earth, but does not provide overload protection. An MCB provides overload protection (and short-circuit protection), but does not provide any detection of leakage currents (unless it's enough to cause an overload!). An RCBO does both, in one device.