# Compliance evidence pack (UNOFFICIAL)

- **Question:** UFC 3-520-05
- **Generated:** 2026-07-21 16:59 UTC
- **e-Publishing catalog checked:** 2026-07-12
- **Supplement layer:** none selected
- **Source:** CheckMyAFI (https://checkmyafi.com) — unofficial reference

> **UNOFFICIAL — VERIFY BEFORE CITING.** Quotes come from indexed copies of public publications. The certified PDF on e-Publishing is the only authoritative source. Your MAJCOM/unit supplement may be stricter.

## Synthesized answer (unofficial)

UFC 3-520-05 is the Unified Facilities Criteria (UFC) document titled "Stationary and Mission Batteries," current as of 1 May 2015, with Change 2 issued 9 January 2020 [UFC 3-520-05].

This UFC provides design and operational criteria for stationary battery installations, including power plant backup power applications, substations, switching stations, and UPS systems [UFC 3-520-05 Appendix B]. It establishes requirements for emergency eyewash and safety shower facilities (located within 20 feet of battery enclosures), electrical receptacle placement in battery rooms, and references ANSI/ISEA Z358.1 for portable emergency facilities [UFC 3-520-05 section 3-10].

AFC references UFC 3-520-05 for architectural requirements governing storage, charging, ventilation, and thermal management of Lithium Ion batteries in mobile applications, while stationary Li-Ion battery installations are prohibited in occupied facilities per UFC 3-520-01 [DAFMAN 91-203 para 29.3.2].

For specific design criteria applicable to your facility type, consult the full UFC 3-520-05 document at http://dod.wbdg.org/.

Unofficial — answered from indexed publication text, which may be incomplete or out of date. Your MAJCOM/unit supplement may be stricter. Verify the official PDF before acting or writing a finding.

## Controlling Air Force guidance (quoted)

**DAFMAN 91-203 para 29.3.3, p. 331** (effective/current as of 2026-06-25)

> g, maintaining, or storage of each battery type will follow the manufacturer’s instructions and recommendations. (T-1) DAFMAN91-203 24 FEBRUARY 2026 331 29.3.2. For the architectural requirements for the storage, charging, ventilation, exhaust, and thermal management of Lithium Ion (Li-Ion) batteries for mobile applications and equipment, refer to UFC 3-520-05. (T-0) The installation of stationary battery applications using Li-Ion technologies are prohibited in occupied facilities per UFC 3-520-01. Installation BE will use ACGIH’s Industrial Ventilation: A Manual of Recommended Practice for Operations and Maintenance, to determine ventilation requirements. (T-0) 29.3.3. Doors. Battery shop exit doors will swing outwards. (T-1) Refer to paragraph 2.7 for roll up door requirements. 29.3.4. F

Official source: https://static.e-publishing.af.mil/production/1/af_se/publication/dafman91-203/dafman91-203.pdf

## Supplement deltas

_No supplement passage retrieved — check the supplement chain before citing._

## Federal / DoD standards implemented (quoted)

_No federal/DoD passage retrieved._

## NFPA standards (cited by reference — copyrighted, not quoted)

- **NFPA 70** National Electrical Code — cited by DAFMAN 91-203 — official viewer: https://link.nfpa.org/free-access/publications/70/latest
- **NFPA 30** Flammable and Combustible Liquids Code — cited by DAFMAN 91-203 — official viewer: https://link.nfpa.org/free-access/publications/30/latest
- **NFPA 70E** Electrical Safety in the Workplace — cited by DAFMAN 91-203 — official viewer: https://link.nfpa.org/free-access/publications/70E/latest

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Retrieval confidence: 100.0 · CheckMyAFI is not an official Air Force product. Verify every citation against the certified publication.