The easiest way is to follow that specific manufacturer's instructions. If you don't have them, try searching their web site online, or calling their tech support number for a copy of the instructions. The reasoning behind this is that many thermostats are slightly different, and there are also some types that are totally different. There is no single answer.
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Use what is called bell wire or thermostat wire.
Reduces fire hazard. Jcastillo
Disconnect power to geyser and remove the thermostat. Turn heat selector to maximum and with the thermostat removed from the geyser and electrical wiring, test for continuity between the input and output sides of the (L)ive side. If there is continuity the thermostat is ok and the fault may then lie with the element.
Home electrical service in the UK is 230 volts at 50 hertz.
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