I've chucked the bit of paper that came with my immersion heater away, and I'm not great with electrics.
I'm using a heavy duty extension cable and I'm looking at the timer I bought and it says suitable 13 Amps Resistive load and 2Amps inductive.
Is this okay?
It also says min temp 0 Celsius, which is a pain, but I'll use it anyway; actually I could put it in the main supply in the shed; which hopefully won't go much below 0 Celsius.