IEEE C37.04
IEEE Standard Rating for Ratings and Requirements for AC High-Voltage Circuit Breakers with Rated Maximum Voltage Above 1000 V
Published by Institute of Electrical and Electronics Engineers (IEEE)
The CFR incorporates IEEE C37.04 by reference, which makes the edition it names part of the regulation. The CFR requires the edition it names, which may not be the newest. To enforce any other edition, the agency must publish the change in the Federal Register.
The edition the CFR requires
IEEE C37.04-2018, approved December 5, 2018
As the CFR lists it: “IEEE Std. C37.04-2018, IEEE Standard Rating for Ratings and Requirements for AC High-Voltage Circuit Breakers with Rated Maximum Voltage Above 1000 V, approved December 5, 2018 (“IEEE C37.04”)”
- Listed in 46 CFR 110.10-1(j)(1); required by46 CFR 111.54-1 ↗
How to read it
- Where to get itIEEE Standards Association ↗
A free or purchased copy may not be the edition the CFR names; check it against the edition above. Every incorporated standard can also be inspected at the National Archives (NARA) and at the agency named in the section that lists it.
IEEE C37.04 is copyrighted by its publisher; RegKnot shows its title and the editions the CFR names, not its text. Read from the eCFR's incorporation-by-reference sections, current as of October 26, 2026. The regulation text governs. All standards the CFR requires.