I've just bought a color 3 head and it came with an odd plug that I'd like to re-wire into a Euro socket: My problem is about the wiring colours. Is black neutral or live? I presume green/yellow is earth, but I'm not sure about the black and blue wires. The standards have changed recently I think and I'm not sure of the vintage of this head. My father thinks it doesn't matter as it just powers a halogen lamp, but I don't know anything about electronics.