It looks like that the 3 phases are Blue and The Neutral or Earth is Red.
That Red wire doesn't look it is well secured or poorly stripped off.

In The Netherlands pre 1977, we had Red as Neutral colour, so it was probably the old European colour coding for Neutral.

Although on single phase supplies the phase colour was Green and the Earth wire was Grey pre 1977.


The product of rotation, excitation and flux produces electricty.