Hello my Canadian chums. One hates to intrude, but one could use an assist? I've just bought a Canadian engine block heater. Which came with a Canadian plug which is useless to me. So I have cut it off to fit an English plug. I assume your 220v system has the same wiring colours as us, ie: Brown = Live. Blue = Neutral. Yellow/green = Earth? Also, never having used one, how long does it have to be switched on for? Let us assume 10C below freezing on a 4 litre aluminium V8? Thanks in advance for any help. And we always liked you better than the Septics.