2 circuits in an electrical box?
Is it permitted to have more than one electrical circuit in an outlet box? I'm installing three lights each controlled by two or three switches and it will be more convenient to feed them from separate circuits (since those are the wiring diagrams that I can find and understand). But I'm worried that this might not be considered proper. I'm thinking maybe stray electrical fields, or the possibility of a wire becoming loose and touching another circuit, etc. Is this something I should avoid.