The cost difference of AFCI only breakers vs AFCI + GFCI breakers is typically negligible. In a residence, is there any place you WOULDN’T want to have GFCI with AFCI protection? I typically don’t do GFCI protection on a dedicated circuit for a refrigerator (as long as it’s further than 6’ from a sink) because nuisance trip will spoil a lot of food and people aren’t accessing that receptacle often. Where else would you NOT want GFCI protection on standard 15 to 20 amp circuits?
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