What is the ruling on inhaling or smelling the smoke from burning electrical connections or wires, and what is the ruling if I inhaled the smoke from burning electrical connections and wires while ignorant of the ruling?

If inhaling what was mentioned does not result in harm, then it is not forbidden. But if it results in harm, then it is impermissible due to the hadith: "There is no harm nor reciprocal harm." As for its effect on fasting, it does not invalidate it due to the difficulty of guarding against it, as it is similar to road dust and sifting flour, unless the fasting person intentionally inhales something that has a perceptible body and causes it to enter his throat, in which case his fast is broken.