Originally Posted by kal
I have a 30A control panel and a 30A breaker. While 10ga is required between the two, I use 6ga just in case I ever want to upgrade to a 50A control panel.
Luckily my run is from a subpanel in the basement to my garage with exposed joists (about 20 ft), so easy to upgrade my 10/4 to 6ga later if I ever wanted.
Wanted to clarify my question too... given a 30A breaker in the house, 10/4 in the wall and a 25A breaker in the brew panel, putting 6ga IN the brew panel (anywhere) would seem like overkill. I did up until the breaker, but after that, I should never draw over 25A.
To upgrade, I would need a 50A in the house, 6ga in the wall and by that point, I'm building a new brew panel anyway since my layout is off.