When de-rating wire size what is the minimum size wire allowed on a 20amp branch circuit??? Thanks
P porky Member Location Arkansas Mar 3, 2003 #1 When de-rating wire size what is the minimum size wire allowed on a 20amp branch circuit??? Thanks
dereckbc Moderator Staff member Location Plano, TX Mar 3, 2003 #2 Re: Over curent protection 12 AWG up to 9 current carrying conductors assuming THHN is used.