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NEMA PRP 3-2009 (R2016) addresses the effect of thermal expansion and contraction on long, straight runs of conduit. For this application, O-ring expansion fittings are used to accommodate changes in length.
Guide for Proper Use of System Smoke Detectorsstandard by National Electrical Manufacturers Association, 2022
White Paper on UN2911 Labeling and Transportation of Lamps Containing Radioactive Substancesstandard by National Electrical Manufacturers Association, 02/28/2020
Glossary of Terms Pertaining to Remote Illumination Systemsstandard by National Electrical Manufacturers Association, 04/01/1999
Best Practices for Operating Fluorescent Lighting Systemsstandard by National Electrical Manufacturers Association, 08/02/2012