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IAEI Magazine | Author: Michael O'Boyle
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Michael O'Boyle

Michael O'Boyle, LC, is manager of codes, standards and laboratories for the Lightolier Division of Genlyte/Thomas. He serves on Code-Making Panel 18, representing The American Lighting Association. He also serves on UL Panels for several lighting standards, the UL/CSA Luminaire Harmonization Committee and the NEMA Luminaire Committee.


Installation Clearance Requirements for Recessed Luminaries

National Electrical Code Article 410 Parts M and N provide special provisions for luminaires (lighting fixtures) installed within recessed cavities in walls or ceilings. Most of these code requirements focus on protecting combustible building materials from temperature greater than 90°C (194°F). To align with the Code, nationally recognized luminaire product standards have been developed that contain testing, construction and marking requirements necessary to list products for recessed applications. Products listed to these requirements are rated for specific required installation clearance between luminaire parts and combustible materials. An understanding of these ratings is essential to ensuring proper installation of recessed luminaires and compliance with the Code.