I have existing 220v wiring (outdoors) for a spa that I want to extend another 15 ft. in order to hide the panel from view. Do I have to re-wire the run, or can I just extend it with a junction box and another 15 ft. of cable/wire? I'm in California, if that makes a difference.

Thanks in advance for your help.

A large junction box, say 6"x6"x6" PVC and blue wire nuts for the #8 or #6 wire you probably have will work.

A large junction box, say 6"x6"x6" PVC and blue wire nuts for the #8 or #6 wire you probably have will work.

Thank you very much!