46:1 · The Roman numeral for 1, which is also used in the writing in the English speaking world to signify the acting individual (I am). The sign also represent Imperator, i.e. emperor -in fact, what can be considered as unique or absolute. In connection with electric switches means power or electricity on ( is used as an opposite to in both electricity and mathematical contexts).
    See also in Group 10, a less pronounced symbol for the same idea.