Uniformat D5010
Transformer, dry-type
Also called dry type transformer, XFMR, transformer
Service life
Years in service. One stated life so far; the band will widen as sources are added.
Basis
- 32 years · Energy Conservation Program: Energy Conservation Standards for Distribution Transformers (final rule), 89 FR 29834, April 22, 2024, p113 · IV.F.8 “Transformer Service Lifetime: "a distribution of lifetimes, with an estimated average of 32 years and a maximum of 60 years"” — U.S. Department of Energy, Office of Energy Efficiency and Renewable Energy (planning life)Printed page 29946. Covers all distribution transformers, including low-voltage dry-type (building dry-type) and medium-voltage liquid-immersed (pad-mounted). Mean of a distribution; the maximum is 60 years. Same value also stated on p.5 (printed 29838) and in Table IV summary on p.101 (printed 29934).
How sources are chosen and recorded: sourcing policy.
Municipal accounting lives for electrical (D50)
20 municipal policies from Ontario set a life for electrical as a whole, from 16 distinct tables: 10–50 years, median 20. These are amortization periods chosen for accounting, not measured lives, and they describe the system rather than this component.
Years. Each dot is one stated life and each bar a stated range; equal values stack. The dashed line is the median. Policies that copy the same table count once.
All 25 stated lives
| Municipality | As written | Years | Source |
|---|---|---|---|
| Kingston | Electrical Equipment | 10 | p15 · 2016 |
| Grey Highlands | Exterior Lighting | 15 | p11 · 2026 |
| Meaford | Electrical - Exterior Lighting | 15 | p17 · 2020 |
| The Blue Mountains | Exterior Lighting | 15 | p11 · 2019 |
| Amherstburg | Mechanical/Electrical - HVA, Lighting, Security systems, Electrical Panel | 20 | p8 · 2026 |
| Grey Highlands | Interior Lighting | 20 | p11 · 2026 |
| Grey Highlands | Ice Surface Lighting | 20 | p11 · 2026 |
| Kenora | Buildings - Electrical System | 20 | p15 · 2026 |
| London | Building Components - Services (HVAC, lighting, communication, plumbing etc.) | 20 | p2 · 2023 |
| Meaford | Electrical - Interior Lighting - Standard | 20 | p17 · 2020 |
| Meaford | Electrical - Interior Lighting - High Wattage | 20 | p17 · 2020 |
| Meaford | Electrical - Emergency Lighting | 20 | p17 · 2020 |
| The Blue Mountains | Interior Lighting | 20 | p11 · 2019 |
| The Blue Mountains | Ice Surface Lighting | 20 | p11 · 2019 |
| Welland | HVAC/Electrical/Mechanical | 20 | p8 · 2021 |
| Greater Napanee | E25 Plant Mechanical & Electrical | 25 | p16 · 2012 |
| Kirkland Lake | Buildings and Improvements - Mechanical/Electrical | 25 | p10 · 2020 |
| Rainy River | Building Improvements - Electrical/Plumbing | 25 | p11 · 2010 |
| The Blue Mountains | Electrical System | 25 | p11 · 2019 |
| Bancroft, Centre Hastings, Hastings Highlands, Wollaston · same table | Electrical/Plumbing | 25–30 | p5, p4, p6, p5 |
| Brockton | Mechanical/Electrical (Heating/Cooling System, Refridgerating System) | 40 | p2 · 2009 |
| Greater Madawaska, Quinte West · same table | Electrical | 40 | p17, p38 · 2025 |
| Simcoe | Electrical | 40 | p19 · 2025 |
| Trent Lakes | Electrical | 40 | p10 · 2009 |
| Meaford | Electrical - System | 50 | p17 · 2020 |
Each row was matched to its page automatically: the label and the number appear in the text of the cited page. An editor has not yet compared every row with the table, so follow the page link before relying on one. About the policies · All approved rows as JSON
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). Transformer, dry-type, v0.1.0. https://unfinished.one/c/transformer-dry/v/0.1.0BibTeX
@misc{unfinished_transformer_dry_0_1_0,
title = {Transformer, dry-type},
author = {{unfinished.one}},
year = {2026},
version = {0.1.0},
url = {https://unfinished.one/c/transformer-dry/v/0.1.0},
note = {CC BY 4.0}
}Licence CC BY 4.0 · How to cite · JSON · Versions: 0.1.0