Electrical Clearance : The air distance between the water spray equipment, including piping and nozzles, and unenclosed or uninsulated live electrical components at other than ground potential
NFPA 15 Standard for Water Spray Fixed Systems For Fire Protection, 2001 ed. https://law.resource.org/pub/us/cfr/ibr/004/nfpa.2 5.2002.pdf, (Std: Wtr Spray Fixed Sys for Fr Prac - Amer) {183 NFC}