CSA C22.2 No. 157
Intrinsically safe and non-incendive equipment for use in hazardous locations, including Update No. 2
Published by CSA Group (CSA)
The CFR incorporates CSA C22.2 No. 157 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
CSA C22.2 No. 157-92 (Reaffirmed 2016), dated June 2003, Reaffirmed 2016
As the CFR lists it: “CAN/CSA-C22.2 No. 157-92 (Reaffirmed 2016)—Intrinsically safe and non-incendive equipment for use in hazardous locations, including Update No. 2, dated June 2003, Reaffirmed 2016 (“CSA C22.2 No. 157-92”)”
How to read it
- Where to get itCSA website ↗
The web address the CFR prints for this publisher.
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.
CSA C22.2 No. 157 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.