Hi, I've just obtained an immersion heater & thermostat, 800W, for my calorifier. There were no wiring details & I have a few questions. 1. The element only has two connections, lived & neutral, where should I connect the earth? 2. I have 4 spurs running from the mains junction box each with its own breaker, I plan to connect the immersion heater to the least used spur to the aft cabin. Is this sensible? 3. What is the simplest wiring? I would be happy with a basic on/off switch setup. 4. Anything else I should consider? TIA