I will give you the European size here it is

6 AWG = 16mm²
4 AWG = 25mm²

As far for the conduit size they are in either North Americainé trade size or metric sized

Typically half inch electrode rod is the same as 13 mm electrode rod it will be simauir to other size.

However for the EMT conduit or ridge conduit they are cutted at the standard mesurement so we do still get them in 10 foot sticks on standard mesurement for metric verison it will cutted in meters lengthwise { can get them to standard North Americian lengths if request it }

As far for multi transfomers we sized the EGC to the largest phase conductor size therefore it should be the same as your Electrical code book chart unless something along the way change.

Merci.
Marc


Pas de problme,il marche n'est-ce pas?"(No problem, it works doesn't it?)