:confused: I'm installing a new dishwasher. It is on a 20amp breaker. The wire from the dishwasher won'r reach the junction box. The dishwasher is wired for a 120V for a 15 amp circuit.
Can I SAFELY use about 8 feet of 12 gauge wire to run from the junction box to the dishwasher?

Thanks

I'm confused too so assumptions:

1) a 20 A, 12 AWG circuit is 8' too short
2) Dishwasher requires a 120 V 15 A circuit

Going with these assumptions:
You have to make the splice in an accessible junction box UNLESS a special splice connectior is used and approved by your AHJ. This one: TYCO ELECTRONICS (ALR) CPGI-1116415-2 NON-METALLIC ROMEX CABLE TAP AND SPLICE CONNECTOR. The key is accessible.

I'd extend with 12 AWG.

I'd change the breaker from 20 to 15 amps. That will make everybody happy.

Keep, you are given away-- waaaay too many secrets (Joke) :)