A fool's drivel repeated often enough will some day end up in the lexicon, especially in the moden age of instant mass communications, but that does not make it correct.
"Buss" is not a word, but because there was an electrical manufacturing company called "Bussman" that makes fuses, and people would often shorten it to "Buss Fuses", other illiterates have created a spurious spelling that uses "buss" instead of "bus". It's still incorrect however, in spite of the illiterates repeating it on the internet.
This holds true within the electrical trade, as many old-timers frequently write (not type!) "buss" -- I often see it on equipment labels, one-line drawings, etc.