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The  National Electrical Manufacturers Association (NEMA) has published NEMA LSD 64-2014 Lighting Controls Terminology. An update to its 2012 white paper, LSD 64-2014 clarifies terminology related to daylight responsive controls. 
The document presents an overview of vocabulary used for lighting control systems for both non-residential and residential applications. The purpose in preparing this update is for LSD-6-2014 “to be used as the definitive reference for codes, standards, and legislation,” the press release stated. With the creation of this universal lexicon, new definitions of established terms will be avoided as well as misuse of lighting control vocabulary, overall. The working group overseeing the revision referenced the main standards documents used in this area including the American Society of Heating and Refrigerating and Air Conditioning Engineers standards, the Illuminating Engineering Society Handbook, NEMA guides, and all energy codes in use at present, including California’s Title 24. The document can be downloaded for free via the NEMA website