IEEE C57.12.50

For IEEE C57.12.50, laboratory is UL LLC; standard title is Ventilated Dry - Type Distribution Transformers, 1 to 500 kVA, Single-Phase; and 15 to 500 kVA, Three Phase, verified against its source on 2026-08-10.

Laboratory: UL LLC verified
Standard number: IEEE C57.12.50 verified
Standard title: Ventilated Dry - Type Distribution Transformers, 1 to 500 kVA, Single-Phase; and 15 to 500 kVA, Three Phase verified

Sourceosha.gov

Verified2026-08-10

Review by2026-12-08

DatasetWhich OSHA NRTL is recognized for which test standard: all 21 labs' scopes of recognition, cross-referenced

What the source says

IEEE C57.12.50 | Ventilated Dry - Type Distribution Transformers, 1 to 500 kVA, Single-Phase; and 15 to 500 kVA, Three Phase |

— osha.gov, retrieved 2026-08-10

Source

osha.govhttps://www.osha.gov/nationally-recognized-testing-laboratory-program/ul

Last verified against source: 2026-08-10. Due for re-check by 2026-12-08. This page as Markdown · OKF bundle · full dataset as JSON.