Sizing MCBs and RCCBs for a Home
September 5, 2026
Curve types, breaking capacity, and why nuisance tripping happens.
A board that trips on inrush is as much a failure as one that does not trip at all. We cover B, C and D curves, choosing breaking capacity against the supply, why wet areas deserve their own RCCB way, and how to lay out a board so a fault is obvious rather than mysterious.