ru3apr/iStock/Thinkstock
Ecmweb 7781 Redandblackleads595pngcropdisplay1
Ecmweb 7781 Redandblackleads595pngcropdisplay1
Ecmweb 7781 Redandblackleads595pngcropdisplay1
Ecmweb 7781 Redandblackleads595pngcropdisplay1
Ecmweb 7781 Redandblackleads595pngcropdisplay1

Tip of the Week: Don’t Get Too Attached to Those Test Leads

Aug. 31, 2015
Be proactive about replacing worn and damaged test leads.

We get attached to some things. Like that screwdriver your dad gave you for your sixth birthday. The handle’s worn and the blade’s chipped, but you just can’t get rid of the thing. If you use this same line of thinking with test leads, it’s a mistake that can get you killed.

Try to make a point of observing the condition of test leads you and your coworkers are using. Chances are, you’ll find at least one set that’s been “repaired” with vinyl tape. What other defects can you spot? The tip that keeps coming apart is an obvious problem, but don’t overlook the fact that the “dirt” on “dirty” test leads may be conductive.

Then, there’s the hidden damage. Test leads that have been walked on, pinched in a gang box, or in some other way subjected to force that the insulation wasn’t designed to handle, are dangerous to use.

Photo credit: ru3apr/iStock/Thinkstock

Unlike an arc blast, test leads are inexpensive. When test leads are obviously defective, it seems obvious that you should replace them rather than waste time and money “repairing” them with tape that actually does not restore the lead to its rated serviceability. In fact, you should replace them even if you merely suspect they might be damaged.

Test leads are inexpensive, but don’t settle for ones that are cheap. Counterfeiting is a growing problem. Buy a trusted brand (i.e., a company whose meters you use and trust), from a trusted source (e.g., your electrical distributor). This way, you don’t end up with leads that say 1,000V on the package, but actually top out around 300V.

Make sure your new leads are rated for the intended use (e.g., 1,000V, CAT IV), have those finger guards, and have shrouds on the input connectors.

About the Author

Mark 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.

Voice your opinion!

To join the conversation, and become an exclusive member of EC&M, create an account today!

Sponsored Recommendations

Electrical Conduit Comparison Chart

CHAMPION FIBERGLASS electrical conduit is a lightweight, durable option that provides lasting savings when compared to other materials. Compare electrical conduit types including...

Don't Let Burn-Through Threaten Another Data Center or Utility Project

Get the No Burn-Through Elbow eGuide to learn many reasons why Champion Fiberglass elbows will enhance your data center and utility projects today.

Considerations for Direct Burial Conduit

Installation type plays a key role in the type of conduit selected for electrical systems in industrial construction projects. Above ground, below ground, direct buried, encased...

How to Calculate Labor Costs

Most important to accurately estimating labor costs is knowing the approximate hours required for project completion. Learn how to calculate electrical labor cost.