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NECA 411-2014
Standard for Installing and Maintaining Uninterruptible Power Supplies (UPS)
This standard describes installation and maintenance procedures for permanently installed, static, three phase Uninterruptible Power Supplies (UPSs) rated 30 kVA or more and rated 600 Volts or less, and related battery systems installed indoors or outdoors for commercial and industrial applications.
National Electrical Contractors Association [neca]