On Wed, 10 Jul 2019 19:58:49 -0700 (PDT), A K
wrote:

Having a hard time finding something that isn't rocket science.

I want to know the current carrying capacity of shielded wire by the wire gauge for runs of less than 25 feet.

I found this.

https://www.engineeringtoolbox.com/w...ges-d_419.html

Any recommendations?

Generally you will run into voltage drop problems before you have
overheating problems with low voltage. A 3 or 4 volt drop at 120v is
no big deal but that same current will still drop 3 or 4 at 12v and
that is a killer.