2011 NEC:
406.12 Tamper-Resistant Receptacles for
Dwelling Units
In all areas specified in 210.52, all nonlocking-type 125-volt, 15- and 20-ampere receptacles shall be listed tamper-resistant receptacles.
Exception: Receptacles in the fol lowing locations shall not be required to be tamper-resistant:
(1) Receptacles located more than 1.7 m (51⁄2 ft) above the floor.
(2) Receptacles that are part of a luminaire or appliance.
(3) A single receptacle or a duplex receptacle for two appliances located within dedicated space for each appliance that, in normal use, is not easily moved from one place to another and that is cord-and-plug connected in accordance with 400.7(A)(6), (A)(7), or (A)(8).
(4) Nongrounding receptacles used for replacements as permitted in 406.4(D)(2)(a)
