Uniformat D5090

Uninterruptible power supply

Also called UPS

• Confidence C
• Version 0.1.0 (permanent link)
• Reviewed 2026-10-22

Withdrawn. This is version 0.1.0. The entry was withdrawn in version 0.2.0 (2026-10-22): Its only sources were outside North America, which the library no longer uses. No US or Canadian source is available yet. Current status.

Service life

Years in service. The band runs from the shortest to the longest life the sources state, so it shows how much they disagree, not how long 80% of units last. The line is the median of the stated lives.

Basis

• 10 years · Design standards: employer's requirements – Technical Manual (ER-DFE-XX-XX-T-X-0201, revision A-C01), p275 · 5.7.4 “UPS: 10 years” — Department for Education (England) (design life)
  Printed page 275. Electrical infrastructure section. Section 6.2.4 (p.348) also gives 'UPS device: 10 years' and 'UPS batteries: 5 years' for network equipment. Minimum life expectancy (design requirement) for DfE-funded school buildings. Minimum design requirements placed on contractors for school buildings, not observed replacement ages. Section 5.1.4 (sanitaryware) refers to CIBSE Guide M Appendix 12.A1 'in general'.
• 6.66 years · General depreciation rates (IR265), July 2021, p47 · COMP “Power supplies (uninterruptable)” — Inland Revenue (Te Tari Taake), New Zealand (accounting life)
  Printed page 47. Computers category. Spelling as printed. Printed DV 30%, SL 21%. Tax depreciation lives set by the Commissioner of Inland Revenue for New Zealand income tax, not engineering or asset-management lives; they are banded and often short (e.g. reticulation piping 25 years). The July 2021 edition was the newest PDF reachable; the online Depreciation Rate Finder may hold later determinations.

How sources are chosen and recorded: sourcing policy.

Preventive maintenance

No maintenance tasks are sourced for this component yet.

Open questions

• Every source here is a published planning, design or accounting life. None is observed replacement data.
• No preventive maintenance tasks are sourced yet.

Know the answer? Send it with a source to [email protected].

Cite this

Citation

unfinished.one (2026). Uninterruptible power supply, v0.1.0. https://unfinished.one/c/ups/v/0.1.0

BibTeX

@misc{unfinished_ups_0_1_0,
  title = {Uninterruptible power supply},
  author = {{unfinished.one}},
  year = {2026},
  version = {0.1.0},
  url = {https://unfinished.one/c/ups/v/0.1.0},
  note = {CC BY 4.0}
}

Licence CC BY 4.0 · How to cite · JSON · Versions: 0.2.0, 0.1.0