The sheer illustration of a meter connected to mains in current measurement mode is a problem.
It's from the alternate reality where houses have 1A constant-current outlets rather than 240V constant-voltage.
Need 1kW for your vacuum cleaner? Wire it to be 1000 ohms.
Every powerpoint's switch is a shorting shunt. They have to stay shunted when not in use. You hook up your appliances in parallel and then disable the shunt.
Instead of fuses (blow open on 10A over-current) you have voltage threshold tubes (short on 240V over-voltage). Reset them by flicking the powerpoint shunt switch on.
Nothing is ground referenced. All circuits in the house are run on transformers (one transformer per circuit).