IEEE C37.20.4
What is the laboratory for IEEE C37.20.4?
For IEEE C37.20.4, laboratory is UL LLC; standard title is Indoor AC Switches (1 kV-38 kV) for Use in Metal-Enclosed Switchgear, verified against its source on 2026-09-17.
IEEE C37.20.4 | Indoor AC Switches (1 kV-38 kV) for Use in Metal-Enclosed Switchgear |
— osha.gov, retrieved 2026-08-10
- Laboratory
- UL LLC
- Standard number
- IEEE C37.20.4 verified
- Standard title
- Indoor AC Switches (1 kV-38 kV) for Use in Metal-Enclosed Switchgear verified
Source
- osha.govhttps://www.osha.gov/nationally-recognized-testing-laboratory-program/ul