The ninth Canadian edition of Electrical Wiring: Commercial is based on the 2021 Canadian Electrical Code (CEC) and provides a valuable resource to instructors and students alike. Drawing on decades of industry and classroom experience, the authors guide students through the critical tasks and responsibilities required for commercial wiring. Throughout, explanations and examples are provided to help the reader prepare for common situations that will occur on the job where work is planned, where there is no advance planning, and where repairs are needed. This text is a part of the Electrical Wiring series, which prepares students to pass the Red Seal Qualification Exam, the national exam required before students can begin their careers as professionally certified electricians. There is a MindTap available with this title, with a variety of resources to reinforce and build upon what students are learning in their course.