ECN Forum Forums General Topics of the Trade Non-US Electrical Systems & Trades Trailing sockets or Extension cords for Belgium

The blue connector combinated with 3 x 2,5mm² H07RNF (rubber cable) will be okay. Btw it is much more common than in Germany. F.i. every machine in a standard super market's wet area is connected that way.

Be aware of the fact that Belgium still has a lot of places with 3 x 230V TT-system. I.e. 2 live wires + PE(ground), no neutral. Then blue is a live wire.