is AFCI required for 220v CA residential?
NEC AFCI requirements only apply to 120V, 15/20A circuits

NEC 210.12(A) is clear on this (list omitted):


  (A) Dwelling Units. All 120-volt, single-phase, 15- and 20-
  ampere branch circuits supplying outlets or devices installed in
  dwelling unit kitchens, family rooms, dining rooms, living
  rooms, parlors, libraries, dens, bedrooms, sunrooms, recreation
  rooms, closets, hallways, laundry areas, or similar rooms or
  areas shall be protected by any of the means described in
  210.12(A)(1) through (6):


Furthermore, a quick check of the 2016 CEC reveals that it hews to the 2014 NEC language with no state amendments (the quote above is from the 2017 NEC).