ECN Forum Forums Code Related Discussion NEC & other Code issues Grounding 12/2 and 14/2 cable in the same gang box

Thanks very much for your response with regards to combining 14/2 and 12/2 ground in the same box. As for the reason I posted the code (granted it may be old: The ground conductor helps If there's an insulation or short to conduct the electricity away and possibly trip the breaker. In this case, a 14/2 is rated at 15A while a 12/2 is rated at 20A. In case of a short, the 14/2 doesn't seem to have the ca safely for a 20A circuit. May be I am reading too much into this, I need some coffee.

Thanks