ECN Forum Forums General Topics of the Trade General Discussion Area fire padding in fire walls???????

maybe some one can help me out.Are fire pads needed on reciptical & switch boxes that are in a fire wall.stair-well wall and or fire rated shaft walls.I know about being at least 20" apart in same bay & back to back but single boxes ,like lighting box switch,recipt,p/s ect.Inspector in redlands california is making me do it and I could't find were it said that in NEC,ICC BUILDING CODE.THANK YOU FOR THE HELP.BRUCE