CSA C22.2-No.45-2-08:2021 pdf download.Electrical Rigid Metal Conduit一Aluminum, Red Brass, and Stainless Steel
This standard uses the IEC format but is not based on, nor is it to be considered equivalent to, an IEC standard. This standard is published as an equivalent standard for ANCE, CSA Group, and UL. An equivalent standard is a standard that is substantially the same in technical content, except as follows:Technical national differences are allowed for codes and governmental regulations as well as those recognized as being in accordance with NAFTA Article 905, for example, because of fundamental climatic,geographical, technological, or infrastructural factors, scientific justification, or the level of protection that the country considers appropriate. Presentation is word for word except for editorial changes.
Reasons for differences from IEC
The Technical Harmonization Subcommittee identified several IEC standards that address electrical conduit and tubing included in the scope of this standard. The IEC standards for electrical conduit and tubing are recognized as being generally system-specific, containing the requirements for the relevant conduits and cables and associated fttings in several discrete IEC standards.
The THSC determined the safe use of electrical conduit and tubing is dependent on the design and performance of the conduit and tubing systems with which they are intended to be installed. Significant investigation is required to assess safety and system compatibility issues that may lead to harmonization of traditional North American electrical conduit and tubing and associated fttings with those presently addressed in the known IEC standards. The THSC agreed such future investigation might be facilitated by the completion of harmonization of the North American standards for electrical conduit and tubing and their fttings.
The interpretation by the standards development organization of an identical or equivalent standard is based on the literal text to determine compliance with the standard in accordance with the procedural rules of the standards development organization. If more than one interpretation of the literal text has been identified, a revision is to be proposed as soon as possible to each of the standards development organizations to more accurately reflect the intent.
5.6.1 Elbows shall be made from the same grade of tube as that used for straight lengths of conduit and shall be coated and threaded in accordance with the requirements for conduit in this standard. Field-produced bends are not included in this standard. See Annex C.
5.6.2 The weight of an elbow, based upon the straight length from which it is formed, shall comply with the requirements for nipples specified in Clause 5.5.2 and Table 5.4 and Table 5.5.
5.6.3 The curve of an elbow shall be formed using any suitable bending equipment capable of producing elbows with a radius of the curve to the centerline not less than that indicated in CSA C22.1, NOM-001-SEDE, and NFPA 70. The curved portion of an elbow shall be smooth and continuous throughout the bend without creases when examined visually under an artificial light source using normal or corrected-to-normal vision. Elbows sharper than 90 degrees are not included in this standard.CSA C22.2-No.45-2-08 pdf download.