Thank you you for the answers guys. To be more precise with the case. There will be about 8 or 9 110V sockets 16A (internally fused I guess). The furthest socket is about 50m away from Transformer. All this will be fitted in PRR or modular switchgear enclosure if you like. The customer is not providing any details about LVAC (transformer) unit but asking for this amount of sockets to be fitted and in this particular arrangement which is ring arrangement. Those sockets are going to be using mostly for power tools etc and they would like to have at least one socket available in each room/section. I hope this make more sense now and 4mm2 cable and 32A MCB sound more understandable.

Thank you you for the answers guys. To be more precise with the case. There will be about 8 or 9 110V sockets 16A (internally fused I guess). The furthest socket is about 50m away from Transformer. All this will be fitted in PRR or modular switchgear enclosure if you like. The customer is not providing any details about LVAC (transformer) unit but asking for this amount of sockets to be fitted and in this particular arrangement which is ring arrangement. Those sockets are going to be using mostly for power tools etc and they would like to have at least one socket available in each room/section. I hope this make more sense now and 4mm2 cable and 32A MCB sound more understandable.

The customer is not providing any details about LVAC (transformer) unit

If you are responsible for the choice of breaker and cable, then you need to check then if this is the normal "110V  centre tapped" i.e. two 55 wolt windings in series with an earth point in the middle, or one side is earthed, so there is a definite live and neutral it affects the fusing arrangement and if breakers are double pole.

If the customer is responsible for the design, and you are 'only' the wireman as it were, then  it needs to be crystal clear that you accept no responsibility for the design and it is up to them as design authority  to ensure that the ADS operates safely to their design.
You should be very wary of accidentally acquiring the  responsibility for a design that is not yours, and you do not have full visibility or control over  - what if the transformer they chose cannot operate a 32A breaker but catches fire above 20A instead for example - is that your fault ? It could be...

It all sounds very odd as described.

Mike.