Equipment System : (Hcf-ElectrSys) A system of feeders and branch circuits arranged for delayed, automatic, or manual connection the alternate power source and that serves primarily 3-phase power equipment
NFPA 99 Standard for Health Care Facilities, 2002 ed. https://law.resource.org/pub/us/cfr/ibr/004/nfpa.9 9.2005.pdf, (Std: Hlth Care Fcilty - Amer) {242 NFC}