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How are Listed tamper-resistant receptacles identified?

Posted By Underwriters Laboratories, Tuesday, January 01, 2008
Updated: Friday, February 08, 2013

Question: Listed tamper-resistant receptacle

Section 406.11 of the 2008National Electrical Code(NEC) requires receptacles installed in dwelling units to be tamper resistant. How are Listed tamper-resistant receptacles identified?


Tamper-resistant receptacles are Listed under the product category Receptacles for Plugs and Attachment Plugs, (RTRT), located on page 284 in the 2007 UL White Book or on UL’s Online Certification Directory enter RTRT at the category code search. The Guide Information for RTRT will be updated in the 2008 White Book to reflect the requirements in dwelling units as indicated below.

The Guide Information for RTRT online states, "Tamper-resistant receptacles are receptacles for use in dwelling units in accordance with the NEC, specifically Section 210.52, or in pediatric patient care areas in accordance with Article 517 of theNEC, and are identified by the words ‘‘Tamper Resistant’’ or the letters ‘‘TR’’ where they will be visible after installation with the cover plate removed.” Tamper-resistant receptacles may be of the general-grade, hospital-grade or isolated-ground type.

Read more by UL

Tags:  January-February 2008  UL Question Corner 

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