Unsafe Conditions When Running Raceway — Part 6
Raceway is often run in an existing, operational facility. For example, a manufacturing plant installs a new machine and needs a branch circuit added. Part of the job may entail running raceway to an existing panel that contains energized circuits.
Typically, you would be expected to work in this panel while it is energized, under the theory that you’re not going to be working on any energized circuits — you’re just opening the concentric knockout on one wall and threading a locknut onto a fitting you’re pushing through to the inside. What can possibly go wrong?
Here are some tips to stay safe:
- Use insulated tools.
- Use an insulated blanket or similar barrier.
- Wear gloves rated for the voltage you would encounter if you touched a live part in that panel.
- Wear the proper PPE for the energy you will be exposed to while that cover is off (breakers can get hot and explode with no warning).
- Visually inspect for neutral-ground bonds; these can put enclosures at line voltage if a circuit neutral is opened.
About the Author
Mark LamendolaMark Lamendola
Mark is an expert in maintenance management, having racked up an impressive track record during his time working in the field. He also has extensive knowledge of, and practical expertise with, the National Electrical Code (NEC). Through his consulting business, he provides articles and training materials on electrical topics, specializing in making difficult subjects easy to understand and focusing on the practical aspects of electrical work.
Prior to starting his own business, Mark served as the Technical Editor on EC&M for six years, worked three years in nuclear maintenance, six years as a contract project engineer/project manager, three years as a systems engineer, and three years in plant maintenance management.
Mark earned an AAS degree from Rock Valley College, a BSEET from Columbia Pacific University, and an MBA from Lake Erie College. He’s also completed several related certifications over the years and even was formerly licensed as a Master Electrician. He is a Senior Member of the IEEE and past Chairman of the Kansas City Chapters of both the IEEE and the IEEE Computer Society. Mark also served as the program director for, a board member of, and webmaster of, the Midwest Chapter of the 7x24 Exchange. He has also held memberships with the following organizations: NETA, NFPA, International Association of Webmasters, and Institute of Certified Professional Managers.