I am not aware of power types and wiring standards in France, so I can't offer too much advice. I would, however, recommend that you call a smaller hardware store and ask them for the wiring standard. They should be able to tell you what color wire goes where.

Is it a polarized plug? Is one of the prongs fatter than the other?

You could disassemble a power plug on an item you don't want and figure it out from that.
gainesvillegreen Reviewed by gainesvillegreen on . I need help wiring my 3 prong plug Hello. I'm in France, and I bought a fluorescent lamp by OSRAM that came with wordless instructions for connecting the wires to the lamp (I had to buy the wires at a different store) so I bought the cable with blue, yellow/green and brown wires inside, and I bought a 3 prong plug, (well, here in france it's 2 prongs and one hole). I can't figure out what goes where and what's not supposed to be touching what in the plug. If I could find a pdf with pictures, I think I could figure it out. Rating: 5