IEEE C57.12.40
What is the laboratory for IEEE C57.12.40?
For IEEE C57.12.40, laboratory is UL LLC; standard title is Three Phase Secondary Network Transformers, Subway and Vault Types (Liquid Immersed); 2500 kVA and Smaller, verified against its source on 2026-09-17.
IEEE C57.12.40 | Three Phase Secondary Network Transformers, Subway and Vault Types (Liquid Immersed); 2500 kVA and Smaller |
— osha.gov, retrieved 2026-08-10
- Laboratory
- UL LLC
- Standard number
- IEEE C57.12.40 verified
- Standard title
- Three Phase Secondary Network Transformers, Subway and Vault Types (Liquid Immersed); 2500 kVA and Smaller verified
Source
- osha.govhttps://www.osha.gov/nationally-recognized-testing-laboratory-program/ul