前言:这是导管、管道和电缆支架硬件的协调CSA和UL标准。这是CSA C22的第二版。2第18.4条和UL 2239第二版。本版CSA C22。2第18.4号取代2004年出版的前一版。本协调标准由CSA集团和美国保险商实验室有限公司（UL）编制。感谢美洲国家电工标准协调理事会（CANENA）导管和电缆硬件技术协调小组委员会的努力和支持。范围:1.1这些要求包括根据国家电气规范NFPA 70和加拿大电气规范（CEC）第一部分的规定，用于支撑导管、管道和电缆的硬件，如吊架、订书钉、皮带和类似装置。 1.2这些要求还包括非金属护套电缆、保护板和保护套管的支架。1.3这些要求不包括与地面电缆管道、电线管道或母线管道系统、喷淋系统和其他消防用管道系统一起使用的五金件、与照明灯具一起使用的五金件，或用于接地和连接应用的五金件。1.4这些要求不包括:a）用于支撑接线盒的硬件（见UL 514A或CSA C22.2第18.1号）b）导管和电缆配件（见UL 514B或CSA C22.2第18.3号）c）异径垫圈（见UL 514B或CSA C22.2第18.3号）d）电缆或软线的拉手（见UL 514B或CSA C22.2第18.3号）e）电缆扎带（见UL 1565或CSA C22.2第18.5号）f）定位装置（见UL 1565或CSA C22。 2第18.5条）

Preface:This is the harmonized CSA and UL standard for Hardware for the Support of Conduit, Tubing, and Cable. It is the second edition of CSA C22.2 No. 18.4 and the second edition of UL 2239. This edition of CSA C22.2 No. 18.4 supersedes the previous edition(s) published in 2004.This harmonized standard was prepared by CSA Group and Underwriters Laboratories Inc. (UL). The efforts and support of the Technical Harmonization Subcommittee for Conduit and Cable Hardware, of the Council on the Harmonization of Electrotechnical Standards of the Nations of the Americas (CANENA), are gratefully acknowledged.Scope:1.1These requirements cover hardware for the support of conduit, tubing, and cable, such as HANGERS, STAPLES, STRAPS, and similar devices for installation in accordance with theNational Electrical Code, NFPA 70, and theCanadian Electrical Code (CEC), Part I.1.2These requirements also cover STANDOFFS for nonmetallic-sheathed cable, PROTECTOR PLATES, and PROTECTOR BUSHINGS.1.3These requirements do not cover hardware for use with surface raceway, wireway, or busway systems, sprinkler systems, and other piping systems used for fire protection service, hardware for use with lighting fixtures, or hardware for grounding and bonding applications.1.4These requirements do not cover:a) Hardware intended to support boxes (see UL 514A or CSA C22.2 No. 18.1)b) Conduit and cable fittings (see UL 514B or CSA C22.2 No. 18.3)c) Reducing washers (see UL 514B or CSA C22.2 No. 18.3)d) Pulling grips for cable or cord (see UL 514B or CSA C22.2 No. 18.3)e) Cable ties (see UL 1565 or CSA C22.2 No. 18.5)f) POSITIONING DEVICES (see UL 1565 or CSA C22.2 No. 18.5)