I am not well versed on this section of the code, especially the 20th edition. What would be the classification of a room with a 40, 000 litre tank storing # 2 fuel oil be? IE this is diesel, so I dont know if with the flash point of diesel, the area isnt a hazardous location.
It seems that a room with a diesel genset is not a hazardous location either, and you are pretty much certain fuel is being stored there.
