NFPA · National Fire Protection Association
The body publishing the electrical and fire codes that gate data-hall electrical design, lithium-battery placement, and suppression schemes.
Current numbers
UL 9540A 6th ed.thermal-runaway propagation test method; most significant revision, 6th ed. released Mar 13 2026 (adds off-gas ignition + large-scale fire testing, harmonized with NFPA 855 2026)
IEC 62305international lightning-protection standard (risk, LPS, SPM, services); NFPA 780 is the NA counterpart