What are the California requirements for a lead acid battery storage room ventilation? I have seen in the NEC that the room is required to be ventilated per sec. 408.9, but what are the specific requirements and code sections for California?
608.5 Ventilation. Ventilation shall be provided in accordance with the International Mechanical Code and the following: 1. The ventilation system shall be designed to limit the maximum concentration of hydrogen to 1.0 percent of the total volume of the room; or 2. Continuous ventilation shall be provided at a rate of not less than 1 cubic foot per minute per square foot (1 cfm/ft2) [(0.0051m3/(s â‹… m2)] of floor area of the room.
form the 2003 ifc it is 608.5 in the 2006 ifc and adds exception for lithium- ion batteries
608.6 Ventilation. Ventilation of stationary storage battery systems shall comply with Sections 608.6.1 and 608.6.2.
608.6.1 Room ventilation. Ventilation shall be provided in accordance with the California Mechanical Code and the following: 1. For flooded lead acid, flooded nickel-cadmium, and VRLA batteries, the ventilation system shall be designed to limit the maximum concentration of hydrogen to 1 percent of the total volume of the room; or 2. Continuous ventilation shall be provided at a rate of not less than 1 cubic foot per minute per square foot [1 ft3/min/ft2 or 0.0051 m3/(s "¢ m2)] of floor area of the room.
Exception: Lithium-ion batteries shall not require ventilation.
=========================== Additional information on batteries.....
From the 2007 CFC... BATTERY SYSTEM, STATIONARY LEAD ACID. A system which consists of three interconnected subsystems: 1. A lead-acid battery. 2. A battery charger. 3. A collection of rectifiers, inverters, converters, and associated electrical equipment as required for a particular application.
BATTERY TYPES *Nickel cadmium (Ni-Cd) battery. An alkaline storage battery in which the positive active material is nickel oxide, the negative contains cadmium and the electrolyte is potassium hydroxide.
*Nonrecombinant battery. A storage battery in which, under conditions of normal use, hydrogen and oxygen gasses created by electrolysis are vented into the air outside of the battery.
*Recombinant battery. A storage battery in which, under conditions of normal use, hydrogen and oxygen gases created by electrolysis are converted back into water inside the battery instead of venting into the air outside of the battery.
*Stationary storage battery. A group of electrochemical cells interconnected to supply a nominal voltage of DC power to a suitably connected electrical load, designed for service in a permanent location. The number of cells connected in a series determines the nominal voltage rating of the battery. The size of the cells determines the discharge capacity of the entire battery. After discharge, it may be restored to a fully charged condition by an electric current flowing in a direction opposite to the flow of current when the battery is discharged.
*Valve-regulated lead-acid (VRLA) battery. A lead-acid battery consisting of sealed cells furnished with a valve that opens to vent the battery whenever the internal pressure of the battery exceeds the ambient pressure by a set amount. In VRLA batteries, the liquid electrolyte in the cells is immobilized in an absorptive glass mat (AGM cells or batteries) or by the addition of a gelling agent (gel cells or gelled batteries).
*Vented (Flooded) lead-acid battery. A lead-acid battery consisting of cells that have electrodes immersed in liquid electrolyte. Flooded lead-acid batteries have a provision for the user to add water to the cell and are equipped with a flame-arresting vent which permits the escape of hydrogen and oxygen gas from the cell in a diffused manner such that a spark, or other ignition source, outside the cell will not ignite the gases inside the cell.
And a couple more sections that should be looked at:
[F] 907.2.23 Battery rooms. An approved automatic smoke detection system shall be installed in areas containing stationary storage battery systems having a liquid capacity of more than 50 gallons (189.3 L). The detection system shall be supervised by an approved central, proprietary or remote station service or a local alarm that will sound an audible signal at a constantly attended location.
309.3 Ventilation. Ventilation shall be provided in an approved manner in battery-charging areas to prevent a dangerous accumulation of flammable gases.
Would an area in a warehouse used to remove, charge,& replace batteries in forklifts, with less than the amount of hazardous content to be an H occ, meet the defination of Storage Batteries and be required to meet requirements for Storage Batteries per CFC,CEC,CMC? or Would this be just battery storage? Battery storage is less than 10% of the S-1 warehouse area? Is there in fact a difference between STORAGE BATTERIES & Storage of batteries? Thanks Stan