Help with DIY dedicated circuit


I am wanting to install a dedicated circuit for my amp, but getting from my panel to the wall behind my amp is going to be difficult. As I was investigating in my attic, I realized that when I changed my stove from electric to gas, the unused 30 amp Romex 10/3 wire will reach within 15 feet of where I want the wall outlet. Do I install a junction box and run Romex 10/2 to the new wall outlet and use the 30 amp breaker? What is the best way to connect the wires in the junction box?
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Showing 3 responses by mental

@clearthink...lmfao

This turned into a pee contest, sorry folks, I do NOT do pee contests any longer.

Y'all have a good day.
lmbo @ match wits with me? You're foolish. You have now been deemed google jea....you have a good day there, mr google jea
Had you been so knowledgeable you would have known what to do, but chose to copy/paste from google.
Then you have the audacity to come back and act like you're journeyman, or passed the masters exam, which by the way 90% business over the code. Too funny
Seems I owe an apology to several in here. It happens, my turn to eat crow.

Lesson learned, NEC updated, probably a couple of times since I was in the field. With that said, I'll have to double check any advice I try to contribute.
I feel like the village idiot...lulz. My apologies to those I had conflict with.