IEC 61660-1

Short-circuit currents in d.c. auxiliary installations in power plants and substations—Part 1: Calculation of short-circuit currents,

Published by International Electrotechnical Commission (IEC)

The CFR incorporates IEC 61660-1 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

IEC 61660-1:1997

As the CFR lists it: “IEC 61660-1:1997, Short-circuit currents in d.c. auxiliary installations in power plants and substations—Part 1: Calculation of short-circuit currents, (“IEC 61660-1:1997”), including”

  • Listed in 46 CFR 110.10-1(k)(41); required by46 CFR 111.51-4 ↗
    The parts the listing names (3)
    • IEC 61660-1:1997, First Edition, 1997-06
    • IEC 61660-1:1997/COR1:1999, Corrigendum 1 (March 1999), First Edition
    • IEC 61660-1:1997/COR2:2000, Corrigendum 2 (March 2000), First Edition

How to read it

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.

IEC 61660-1 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.