For what it's worth... I found this:
http://www.nfpa.org/publicColumn.asp?categoryID=&itemID=40181&src=NFPAJournal
"So if rooms containing typical circuit breaker panels and small dry transformers do not require any special fire-resistive enclosures, what about sprinklers in these rooms...
Hello Eng-Tips,
I have a commercial (retail) space that has fire sprinklers installed.
I have an area with a standard 100amp circuit breaker panel, a small security alarm panel (DSC PC1832), and a light switch that I have enclosed to keep customers from disturbing this equipment (Children...