Immersion heater installation wiring and maintenance instructions.
Immersion heater thermostat wiring.
The mains cable for an immersion heater is a two core and earth 2 5mm cable.
It shows the components of the circuit as simplified shapes and the capability and signal connections along with the devices.
1 1 when fitting the heater sufficient clearance should be allowed so that the element is not covered by the sludge or deposits which may settle on the bottom of the tank.
1 2 the thermostat or cutout if fitted and offset in the heater should be at the top side of the element bundle.
Cable sizes for an immersion heater.
However because immersion heaters can be left on indefinitely taking 3kw from a ring circuit would reduce the circuits capacity immensely so immersion heaters are placed on their own radial circuit.
Quick video about how to wire immersion heater in the uk.