Semi-enclosed fuse - BS 3036, Circuit breaker - BSEN 60898, Plug-top fuse - BS 1362, Service cut-out fuse - BS 88-3, Residual current device - BSEN 61008, RCBO - BSEN 61009, Thermal & magnetic operation - Circuit breaker, Thermal operation - Fuses, Electromagnetic operation - RCD, Overload - An overcurrent occurring in a circuit that is electrically sound, Fuse element - Part designed to melt when fuse operates, 30A BS 3036 fuse - Red, 20A BS 3036 fuse - Yellow, 15A BS 3036 fuse - Blue, 5A BS 3036 fuse - White, 13A BS 1362 Fuse - Brown, Purpose of the fuse - To protect the cable supplying the load, Type B circuit breaker - Domestic applications, Type C circuit breaker - Commercial/industrial applications, Type D circuit breaker - Heavy industrial applications, Residual operating current - IΔn ,

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