Transformer Room

[TranToan]

I looking for a Standard ( BSI, IEC, AS/NZS or ANSI..) say about Distribution Transformer Room Requirement.
I have 4 Transformers Silicon Immersed 2500kVA-22/0,4-0.23kV.
Must they be in 4 separated rooms or may in a same room?
Anyone know about it, Pls. tell me.
Thanks a lot.

 

[dpc]

In the US, this is an installation issue and would be covered by Article 450 of the National Electrical Code (NFPA-70).