In the UK, there's typically one ring circuit and one lighting circuit per storey, a separate ring circuit for the kitchen, and dedicated circuits for large current draws such as an electric oven or hob, shower, or immersion heater.
Each circuit would have a dedicated MCB (Miniature Circuit Breaker) which will trip if too much current is drawn. The standard MCB rating for a ring circuit in the UK is 32A.
> British household electrical systems are normally built as one large ring circuit, originally in order to save copper after WW2.
> This means you don't have breakers for each branch circuit (there are no branch circuits), just the single mains breaker for the house.