A circuit breaker protects wires and equipment from overload and short circuit. The main selection parameter is the rated current (in amperes), which must match the cable cross-section of the line, not the power of the appliance. For example, a normal socket line gets 16 A, lighting 10 A.
The tripping curve (B, C, D) shows at what overload the breaker trips. For a flat, type "C" is usual, "B" for lighting only, and "D" for motors and devices with a high inrush current.
Mind the number of poles (1P for a normal line, 3P for three-phase) and the breaking capacity (kA). For safety in wet zones it is good to add an RCBO or RCD. The Electrica Group catalogue has breakers and switchboard equipment — choose the right rating, and our specialists will help assemble the board, the "For Long Life" way.
