Home electrical panel – main breaker, branch circuits and shock protection

Design & TechnologyElectrical Engineering & SafetyAges 17–18

The home's electrical panel has a main circuit breaker, a residual-current circuit breaker (RCCB, 30 mA) and branch breakers feeding lighting, sockets, air conditioning, the water heater and the electric stove. Click a branch to switch it on or off and see the current I = P/(U·cosφ) for that branch and for the whole house; click a fault button to trigger an overload, a short circuit or a leakage current through a person, and see which breaker trips first. Click Reset all to restore power.