PDF Standards CSA C22.2 NO. 45.2-08 (R2018)
Electrical Rigid Metal Conduit – Aluminum, Red Brass, and Stainless Steel (Tri-National Standard, with NMX-J-576-ANCE and UL 6A), Includes Update No. 1 (2014), Update No. 2 (2019), and , and Errata (2021)
standard by CSA Group, 10/31/2008