480-8. Battery Locations
Battery locations shall conform to (a), (b) and (c).
(a) Ventilation. Provisions shall be made for sufficient diffusion and ventilation of the gases from the battery to prevent the accumulation of an explosive mixture.
(b) Live Parts. Guarding of live parts shall comply with Section 110-27.
(c) Working Space. Working space about the battery systems shall comply with Section 110-26. Working clearance shall be measured from the edge of the battery rack.
Joe Tedesco, NEC Consultant