I&#x27;m not familiar with continental Europe&#x27;s wiring practices, but here in the states, we use 15A and 20A breakers. The maximum number of outlets per circuit depends on what the circuit is servicing. The electrical code has gotten stricter in this area over time. The smallest appliance wiring gauge is typically 18 AWG (about 0.8230mm^2). Given the size of our breakers, I suppose if the 18 AWG cable were overloaded with a constant current greater than 7A, the insulation may melt and cause a fire. I haven&#x27;t seen it happen personally. I do know (from when I was a kid), that a dead short on an 18 AWG appliance lead will cause the circuit breaker to trip.