Ragnar is simply my first name. Some bloody idiot at my school didn't know the spelling and thought it was "Ragner". Then he swapped it over to Walker Texas Ranger, and that's how I got stuck with that nickname.
I've never seen 6mm2 used for anything but meter feeders in small residential work (lower limit, will soon be changed to 10mm2).
Water heaters if electric at all are typically 100l tank units that only take 1500W and are either wired to a Schuko plug or witzh 3x 1.5mm2 cable. In Germany electric on-demand water heaters start to gain some popularity, they're usually 400V, 20A, that means fed with 4mm2 solid.
