前言:这是电气刚性金属导管（铝、红黄铜和不锈钢）的统一NCE、CSA集团和UL标准。这是NMX-J-576-ANCE的第二版，CSA C22的第一版。2第45.2条，以及UL 6A第二版。这一协调标准已于2021年3月5日联合修订。为此，CSA集团和UL将于2021年3月5日发布修订版，并于2021年3月5日发布新版。范围:1.1这些要求包括12-155（&frac38；-6）贸易尺寸的铝（ERMC-A）和不锈钢（ERMC-SS）电气刚性金属导管、接头、弯头和联轴器，用于根据CSA C22安装电线和电缆的金属线槽。1，加拿大电气规范，第1部分，NOM-001-SEDE，电气安装标准，以及NFPA 70，国家电气规范（见附录A参考项目1）。用户有责任为应用程序确定合适的产品。 1.2根据适用的国家电气安装规范，这些要求还包括16（½）贸易尺寸的红黄铜（ERMC-RB）电气刚性金属导管、接头、弯头和联轴器，用作金属线槽，用于直埋和游泳池应用中的电线和电缆安装。1.3钢导管包含在附录A参考项目2中列出的标准中。

Preface:This is the harmonized ANCE, CSA Group, and UL standard forElectrical rigid metal conduit – Aluminum, red brass, and stainless steel. It is the second edition of NMX-J-576-ANCE, the first edition of CSA C22.2 No. 45.2, and the second edition of UL 6A. This harmonized standard has been jointly revised on March 5, 2021. For this purpose, CSA Group and UL are issuing revision pages dated March 5, 2021, and ANCE is issuing a new edition dated March 5, 2021.Scope:1.1These requirements cover aluminum (ERMC-A) and stainless steel (ERMC-SS) electrical rigid metal conduit, nipples, elbows, and couplings in 12 - 155 (⅜ - 6) trade sizes for use as metal raceway for the installation of wires and cables in accordance with CSA C22.1,Canadian Electrical Code, Part 1, NOM-001-SEDE,Standard for Electrical Installations, and NFPA 70,National Electrical Code(see Reference Item No. 1, Annex A). It is the user's responsibility to determine the appropriate product for the application.1.2These requirements also cover red brass (ERMC-RB) electrical rigid metal conduit, nipples, elbows, and couplings in 16 (½) trade size for use as metal raceway for the installation of wires and cables in direct burial and swimming pool applications in accordance with the applicable national electrical installation codes.1.3Steel conduit is covered by the standards listed in Reference Item No. 2, Annex A.