Preface This is the common CSA and NEMA Standard for metal cable tray systems. It is the third edition of CSA C22.2 No. 126.1, superseding the previous editions published in 2002 and 1998, and the fifth edition of NEMA VE 1, superseding the previous edition published in 2002. Scope This Standard specifies the requirements for metal cable trays and associated fittings designed for use in accordance with the rules of the Canadian Electrical Code (CEC), Part I, and the National Electrical Code (NEC).