50 kVA transformers above suspended ceilings?

[cppoly]

I know 50 kVA transformers aren't allowed above suspended ceilings with plenum return, but is this also true for any installation above a hung ceiling that's not plenum return?

 

[infinity]

Here's the requirement. The cutoff is 50 KVA:

450.13(B) Hollow Space Installations. Dry-type transformers
600 volts, nominal, or less and not exceeding 50 kVA shall
be permitted in hollow spaces of buildings not permanently
closed in by structure, provided they meet the ventilation
requirements of 450.9 and separation from combustible ma-
terials requirements of 450.21(A). Transformers so installed
shall not be required to be readily accessible.

 

[cppoly]

Thanks