I recently ran into an issue where I was designing an electrical system based on the 2005 NEC. This was a low income housing renovation project. We were providing new electrical panels and circuits in the apartments and a 120V smoke detector circuit. Inspector came to inspect work and made note that the smoke detector circuit needed to be AFCI protected per Code. 2005 NEC, 210.12 states that all outlets in dwelling unit bedrooms need to be AFCI protected, an each bedroom had a single, 120V smoke detector in it therefore, because there was only one 120V, smoke detector circuit in the apartment, it needed to be AFCI protected. THOUGHT'S ON THIS ANYONE?