1926.441
Batteries of the unsealed type shall be located in enclosures with outside vents or in well ventilated rooms and shall be arranged so as to prevent the escape of fumes, gases, or
Ventilation systems for stationary batteries must address human health and safety, fire safety, equipment reliability and safety, as well as human comfort. The ventilation system must prevent the accumulation of hydrogen pockets greater than 1% concentration.
This document provides standards for battery room design and operation. It outlines requirements for civil construction including fire resistance of walls and floors, as well as plumbing, ventilation, electrical systems, and safety/maintenance.
Employers must consider exposure to these hazards when developing safe work practices and selecting personal protective equipment (PPE). That is where Article 320, Safety Requirements Related to Batteries and Battery Rooms comes in.
When connecting the batteries, free air space must be provided between each battery. The recommended minimum spacing between batteries is 0.2 inches (5mm) to 0.4 inches (10mm). In all installations, consideration must be given to adequate ventilation for the purposes of cooling.
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