1, The full form of RCCB is Residual-Current Circuit Breaker. It’s used on Academic & Science ,Electrical in Worldwide

A Residual-Current Circuit Breaker (RCCB) is an electrical wiring device that disconnects a circuit whenever it detects that the electric current is not balanced between the phase conductor and the return neutral. The main purpose of RCCB is to detect the current leakage which can cause injury or dead and can lead to fire hazards. It can also detect the fault from over current and short circuit. Where as the other circuit breakers only can detect the neutral current leakage.

2, The full form of RCCB is Radiology Coding Certification Board. It’s used on Associations & Organizations ,Non-Profit Organizations in Worldwide

The Radiology Coding Certification Board (RCCB) is a not-for-profit organization established in May 2000, to promote the highest standards of radiology coding through the credentialing of radiology coders.