Hi Keith,
The EN60439-1 is for general use so that has to be used. -2, -4,-5 is not relevant for your porpose. -3 however could maybe be relevant for you, but depends how you build the cabinet. Is the power and the control circuits in the same cabinet? Then you have to use -1 only. That is, that you mainly have to informe of the Icc/Icf, but you also need to informe of the lowest short circuit (Ikmin.). This is because, that the cabinet has to be protected against indirect contact. This can be made with RCCD, but some customers dont whant that because of faulttrip etc. so the whant to use fuses or circuit breakers. Than you have to inform of the lowest short circuit so the installer can make sure this is at the place.
There are also other information to give up. Those information has to be given according to the Machine directive, where you can use EN 60204-1.
I am not sure if/when the IEC will become relevant, but in the future it is likely that the IEC will take over EN60439.
But for now, if you use the EN60439-1 and EN 60204-1 + EMC + Safety standards, than you should not have any trouble installing the cabinet in the EU. What country is it going to?
PS. There can be some national requerements that also has to be meet.
Best regards
Dariusch