With many models of ranges now sold Europe-wide, we're seeing more units designed for 3-phase operation on the market here.
The British version is generally shipped with a bridging link between the three phase terminals to allow operation on a single-phase supply. Protection is most often a 30A fuse or 32A MCB, although some of the really huge ranges available now need higher.
In commercial situations with 3-ph, the phases would always be identified here right up to the final outlet using our standard red/yellow/blue phase colors (red/white/blue prior to 1965). With the mix of original British codes for fixed cables and European standards for flexible cords, the latter can have three brown phases with markers applied at the ends to provide phase identification.
