Leviton Tamper-Resistant Receptacles   Features and Benefits Once installed, they are permanent, offering continuous protection unlike plastic outlet caps that can be removed Shuttered wallplates add layers of material between blades and receptacle contacts. Underwriters Laboratories (UL) has withdrawn its listing from tamper-resistant wallplates Tamper-resistant receptacles are certified and subjected to severe and documented testing procedures defined by UL Automatic protection whenever a plug is removed Tamper-Resistant Receptacle Literature       Homeowner FAQ Frequently Asked Questions by Homeowners about Leviton's Tamper-Resistant Receptacles.       Tamper-Resistant Receptacle Product Bulletin Information about the important 2008 NEC Code Change, which mandates tamper-resistant receptacles in all new Residential Construction.     Professional FAQ Frequently Asked Questions by Professionals about Leviton's Tamper-Resistant Receptacles.   For more information, we recommend looking at the following resources:   NEMA online video: http://www.childoutletsafety.org/video.html NEMA child safety site: http://www.childoutletsafety.org Go directly to the OneStopBuy.com Tamper-Resistant Receptacles page to select your devices.