Data & sources
Every external dataset RokBench computes with, with its licence, data date, what it feeds and when we last checked it. Standards (NEC, NFPA, IEEE, NEMA, IES, ASHRAE) are cited by clause and never reproduced; their values are your inputs.
Public datasets in use
● primary (the publisher's own regulation text, dataset or manual). Values are parsed from the original tables and cross-checked cell by cell; see Validation for the worked examples.
| Dataset | What it is | Licence | Data date | Feeds | Last checked |
|---|---|---|---|---|---|
| ● DOE 10 CFR 431 Subpart B | Minimum full-load efficiency of general and special purpose motors, by HP, poles and enclosure (regulation text, Table 5) | US federal regulation text, public domain (17 U.S.C. §105) | 2016 and 2027 levels | Motor efficiency defaults in load and generator tools; Reference table | 2026-09-28 |
| ● DOE 10 CFR 431 Subpart K | Minimum efficiency of liquid-immersed and dry-type distribution transformers by kVA at the specified load | US federal regulation text, public domain | 2016 and 2029 levels | Transformer loss defaults in electrical-room heat; Reference table | 2026-09-28 |
| ● DOE 10 CFR 431.97 | Floor-mounted computer-room air conditioner minimum NSenCOP (Table 13) | US federal regulation text, public domain | current table | Electrical-room cooling power default | 2026-09-29 |
| ● OSHA 29 CFR 1910.303 and 1910.269 | Working-space depths by voltage and condition; minimum approach distances for power work | US federal regulation text, public domain | current text | Reference tables S-1, S-2 and approach distances | 2026-09-28 |
| ● UFC 3-540-01 Engine-Driven Generator Systems | Generator criteria: non-linear load share and subtransient reactance, fire-pump starting dip, minimum loading (wet stacking) | US DoD Unified Facilities Criteria, public distribution | Change 3, 2023 | Generator warnings and fire-pump sizing | 2026-09-28 |
| ● USACE TM 5-698-5 | Survey of failure rates and repair times for power, generation and HVAC equipment (PREP database) | US Army Corps of Engineers technical manual, public | 2006 | Default failure and repair rates in the contingency study (packages/engine contingency/rates.json) | 2026-10-03 |
| ● NASA POWER climate normals | Monthly climate averages on a 0.5° grid: temperatures and tilted-surface irradiance | NASA Langley, public, commercial use allowed, attribution requested | 2001–2020 normals | Solar plane-of-array irradiance and cable ambient temperature (/api/v1/site/climate; queried only when you press the button) | 2026-09-29 |
| ● NREL PVWatts (National Laboratory of the Rockies) | Site-specific photovoltaic yield model | US DOE national laboratory API, free key | live | Solar yield comparison and POA fill (/api/v1/site/pvwatts) | 2026-10-03 |
| ● EPA eGRID | Subregion generation and non-baseload CO₂ emission factors; Power Profiler ZIP-to-subregion table | US EPA, public | eGRID2023 rev2 | Solar CO₂ reduction estimate by ZIP | 2026-09-29 |
| ● NASA LIS/OTD HRFC lightning climatology | Global 0.5° annual flash density (total flashes, cloud flashes included) | NASA GHRC, public | HRFC V2.3.2015 | Lightning ground-flash density estimate (Ng = Nt/3 by default); no data beyond 75° latitude | 2026-10-03 |
| ● NIST SP 811 | SI unit definitions and conversion factors | US NIST, public | 2008 edition | Units reference page | 2026-09-28 |
What is input, what is computed, what is referenced
Input: your model and the standard-table values you enter (breaker test X/R, motor multipliers, cable ampacity tables). Computed: everything the engine derives from inputs by the formulas on the Methods pages, with the formula and figure shown. Referenced: the public datasets above, used as defaults you can override, each labelled with its source next to the value. Nothing on the site is a sealed deliverable or a design decision.
Corrections
If a value, a formula or a dataset date here is wrong, write to [email protected] with the page, the value you saw and the source that supports the change. Accepted corrections are logged in the Changelog; we do not silently edit published values. See also the Disclaimer and About.