As recently as the NFPA 110-2002 edition, there was previously a prohibition against maintenance free starting batteries for Level 1 emergency generators:
"5.6.4.5.7 Starting batteries for Level 1 installations shall not be of the maintenance-free (valve regulated type) variety."
However the 2005 NFPA 110 Report on Proposals (ROP) contained the following change, which eventually was approved by the NFPA Standards Council and made its way into NFPA 110-2005:
110-26 Log #7 Final Action: Accept
( 5.6.4.5.7 )
Recommendation: Delete the following text:
Substantiation: The requirement is too restrictive, and maintenance free batteries
are not necessarily VRLA batteries.
As a result of this change, there has not been any such prohibition starting with the NFPA 110-2005 edition.
As with all replacement components, the generator set manufacturer's recommendations should be followed.
For further information about NFPA 110, visit www.nfpa.org/110.
NFPA Disclaimer: Although the author is Chair of the NFPA Technical Committee on Emergency Power Supplies, which is responsible for NFPA 110 and 111, the views and opinions expressed in this message are purely those of the author and shall not be considered the official position of NFPA or any of its Technical Committees and shall not be considered to be, nor be relied upon as, a Formal Interpretation. Readers are encouraged to refer to the entire text of all referenced documents. NFPA members can obtain NFPA staff interpretations at www.nfpa.org.
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