Clearance
Clearance
I believe this is something you need to discuss with the local AHJ and utility company, in my experiences typically 8'-10' clearance in the front of the xfmr, and depending if it is oil filled or dry type. Your utility company should have a sketch or some guidelines they can provide to you when completing your design. I have a sketch from the local utility company it appears out of their service planner binder that gives me clearances for outdoor pad mounted xfmrs with different circuminstances, for ex: within 5'0" of a door, exterior windows and at what elevation, distance from a corner of the bldg. etc.
Hope this helps.