power entrance facility (PEF)
A space in a building where commercial ac power, standby ac power, or both, enter the building. The PEF contains the ac service equipment and may also contain secondary ac surge protective devices. [T1.321-1995]
A space in a building where commercial ac power, standby ac power, or both, enter the building. The PEF contains the ac service equipment and may also contain secondary ac surge protective devices. [T1.321-1995]