1. MCBs you would expect to find in a Domestic Consumer
Control Unit.
Circuit Cables size Current What Circuit it Controls Type of
Breaker MM2 Carrying Circuit
size Capacity
Amps of Cable
Amps
5a 6a 1mm2/1.5mm2 14a to18a Lights Central heating, Radial
10a circuit
15a 16a 2.5mm2 24a Sockets, Radial
20a ImmersionHeaters ,Central circuit
Heating
30a 32a 2.5mm2 32a Sockets , Ring
circuit
40a 45a 6mm2/10mm2 40a to 53a Double Ovens, Shower Radial
50a units circuits