Are concealable nonmetallic extension products listed?
Question:
NEC-2008 has added concealable nonmetallic extensions to Article 382. Are any concealable nonmetallic extension products listed?
Answer
UL presently Lists Nonmetallic Extensions under the main product category Nonmetallic Extensions (PXXT), located on page 285 in the 2010 UL White Book, or they may be found on UL’s Online Certification Directory at www.ul.com/database and entering the category code at the category code search field. These products are intended for installation in accordance with Article 382.
The definition of concealable nonmetallic extensions and the requirements for these devices were added to NEC-2008. This type of wiring that exists today resembles flat conductor cable that can be used to provide power to devices and run on walls, concealed by paint or drywall compound as well as other means, and to be powered by a device that provides personnel protection equivalent to a Class A GFCI for the circuit.
Presently, (05/10) there are no Listings for concealed nonmetallic extensions. However, UL is developing requirements and has several manufacturers interested in pursuing Listings. When a Listing is achieved, UL will probably create a new product category for these devices.
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