I didn't know rca's cant touch ... I'm glad I know now lol... Although I've never intentionally tried or have ever accidently had them touch usaully cuz I'm dealling with other live wires so the batt is disconnected until everything is hooked up again, but I'm not carful to keep them from touching if say I were to swap cables. If I ever want to disable an amp temporarally I always just disconnect the rca cables and let them lay in the trunk haha I'm lucky. What typically happens when they touch?