NEMA has published NEMA LSD 64-2014 Lighting Controls Terminology, which was originally published in 2012, and was updated to clarify terminology related to daylight responsive controls. Goal of LSD 64 is for NEMA definitions to ultimately be used as definitive reference for codes, standards, and legislation. This will eliminate creation of new meanings for already defined terms, minimize misapplication of terminology, and eliminate need for customized glossaries and terminology sections.
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