It's Jerry... the perennial IP theft machine the highest order.
This hack has been selling dangerous fuses since the dawn of modified fuse times.
Not surprised that he made something dangerous and..illegal. as in 'not certified for resale'. As it messes with the AC power section of a piece of hardware.. which, by definition, REQUIRES full testing and approval by agencies of the us federal government or it's appointed offices. After testing the approval must be prominent upon the given item that is for sale and for use in the direct AC power pathway.
AC fuses, AC power sockets, AC power switches, AC intended and utilized wiring, etc, all require government analysis, and applied testing (if deemed necessary), before gaining approval for sale to the public. One cannot just sell anything AC power related to the public, all willy-nilly.