I 2008 års version av National Electrical Code var det inte nödvändigt att byta ut TR. Dock måste nu behållare bytas ut med TR-behållare, om TR-behållare krävs på den platsen.
Så nära som jag kan berätta, måste nästan alla bostadsenhetskärl vara TR från 2014-koden.
National Electrical Code 2014
Chapter 4 Equipment for General Use.
Article 406 Receptacles, Cord Connectors, and Attachment Plugs.
406.4 General Installation Requirements.
(D) Replacements. Replacement of receptacles shall comply with 406.4(D)(1) through (D)(6), as applicable. Arcfault circuit-interrupter and ground-fault circuit-interrupter type receptacles shall be installed in a readily accessible location.
(5) Tamper-Resistant Receptacles. Listed tamper-resistant receptacles shall be provided where replacements are made at receptacle outlets that are required to be tamper-resistant elsewhere in this Code.
406.12 Tamper Resistant Receptacles.
(A) 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.