ECN Forum Forums Code Related Discussion NEC & other Code issues 2 120V circuits in 1 J box

I have situation where I would like to add a light onto a J box. I would like to bring a 14/2 romex from another circuit to feed the light only and keep the other 2 romexs spliced separately. Of course I will splice all the EGC's together.Do I have to make sure that the hots are on a separate phase? Ans do I have to use handle tie if not a multi-wire branch circuit? Is this accepted by the 2002 code?