As the other posts say, it all depends what equipment is actually located within the room. Also what type of clean room? Bio-tech process or semi-conductor manufacturing type construction? What information are you specifically looking for? For pharma/biotech we generally use stainless steel nema 4x cabinets, pvc coated rigid steel conduits for general areas. You want to make sure you know where the electrical hazard classified areas are.
rancam