Historical
NFPA 1221-2016
NFPA 1221 Standard for the Installation, Maintenance, and Use of Emergency Services Communications Systems , 2016 edition
1.1 Scope. This standard provides criteria for identification of hazardous conditions of electrical systems in existing one-family, two-family, and multifamily dwellings, including mobile homes and manufactured homes.
National Fire Protection Association [nfpa]