NFPA 110 is the Standard for Emergency and Standby Power Systems, establishing requirements for the performance of emergency power supply systems (EPSS). For purposes of this section, a Covered Service is any facilities-based, fixed voice service offered as residential service, including fixed applications of wireless service offered as a residential service, that is not line powered. jor modification/updating in 1999. There have also been major shifts in what is permitted by utilities, who very often. Split up into eight chapters and three annexes, the 2016 edition of NFPA 110 is intended to codify the performance — in installation, maintenance, operation and testing — of emergency and standby power systems. These systems provide an alternate source of electrical power in.