Connecting up Sockets in either office or home

OP tells me:

 

the sockets are there for the workbenches that are in the office so for probably soldering or general use (ie Radio etc).But in regards the transformers I believe these may need to be increased in size to cater for the Welding Machinery has the Welding machines require an output of 16KW and the 4KVA Transformers aren't big enough in output requirements.

As the sockets are for general 'small power' use, there'll likely be lot of diversity, so a large number of socket on a 32A or 20A circuit may be quite feasible, as Mike said. If you had a lot of high earth leakage equipment (like an office full of PCs) then you might want to split things down to keep the leakage on each 30mA RCD manageable (9mA max is recommended), but you could still have several sockets on each circuit.


I'm not quite following what purpose the transformers are serving (other than providing 110V RLV) - do you not have a normal 230/400V 3-phase supply? I would have expected 230V or 400V equipment, especially large loads like welders, to be connected direct rather than via a transformer (especially a relatively small one like this). As you're using "ordinary" industrial sockets (with PE contacts) I take it you're not trying to create a separated system for safety reasons.


As for the 16mm² cable on the supply side - that rather depends on what it's connected to and what overcurrrent protection it has.


    - Andy.

OP tells me:

 

the sockets are there for the workbenches that are in the office so for probably soldering or general use (ie Radio etc).But in regards the transformers I believe these may need to be increased in size to cater for the Welding Machinery has the Welding machines require an output of 16KW and the 4KVA Transformers aren't big enough in output requirements.

As the sockets are for general 'small power' use, there'll likely be lot of diversity, so a large number of socket on a 32A or 20A circuit may be quite feasible, as Mike said. If you had a lot of high earth leakage equipment (like an office full of PCs) then you might want to split things down to keep the leakage on each 30mA RCD manageable (9mA max is recommended), but you could still have several sockets on each circuit.


I'm not quite following what purpose the transformers are serving (other than providing 110V RLV) - do you not have a normal 230/400V 3-phase supply? I would have expected 230V or 400V equipment, especially large loads like welders, to be connected direct rather than via a transformer (especially a relatively small one like this). As you're using "ordinary" industrial sockets (with PE contacts) I take it you're not trying to create a separated system for safety reasons.


As for the 16mm² cable on the supply side - that rather depends on what it's connected to and what overcurrrent protection it has.


    - Andy.