The blast has absolutely nothing to do with the amount of incident energy. You can be injured by an arc blast without being burned by it. Do not assume a low incident energy fault is 'tolerable' because you have AF PPE.
Originally Posted by JFletcher
Many high incident energies are due to relatively long clearing times caused by relatively low fault currents through the protective device (like on a transformer secondary, where the protection is on the primary side). The long lasting low fault current arcs can easily melt steel but they are not really explosive (similar to an arc welder).
Just because you can, doesn't mean you should.