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Idea to Innovation: Inventions that Move the Industry

From the first product, a panel conduit that led to the name Panduit, we understood our engineers are the gateway to success and need free reign to investigate and innovate. This is one of their stories.



VeriSafe AVT: The Proof the Power is Off Story

Safety is everything. So, being sure the power is off before you open electrical equipment and start handling wiring matters. But how can you be safe and be sure the circuit is de-energized? What if the only acceptable method is a complex testing process that potentially exposes you to the very danger you’re trying to avoid? This is the story of how a team of engineers, some fresh thinking, and years in the lab resulted in an entirely new product category – absence of voltage testers (AVTs) ­– and positive proof the power is off.



No Light Doesn’t Mean No Power

To understand why the VeriSafe AVT is such a big deal, you have to understand three things: 


You might think a hard-wired voltage indicator would solve the problem – lights out means no power – but you’d be wrong. Indicators warn when power is on, but no signal doesn’t guarantee that a circuit is de-energized. No light could mean the power is off, but it could also be caused by a faulty indicator or installation problems. How would you know the difference? That uncertainty is why OSHA never recognized permanently installed voltage indicators and instead relied on the hand-held tester method. But that means in order to prove there’s no voltage in the de-energized circuit you have to expose yourself to a known-live circuit. The very definition of irony!



Standards Before Sales

Without an official standard authorizing the new absence of voltage tester, the team knew it would be a challenge for the market to adopt it. So, the first challenge was figuring out how to convince the governing bodies that a new way to test was needed. The team turned to safety workshops with organizations like NFPA and IEEE to gather information about electrical accidents and gauge interest in a new solution. Armed with accident data and feedback from safety professionals, the team collaborated with UL to start work on a standard supporting this new, safer methodology.



Now, Safety is Just a Press Away

Through years of development and collaboration with industry groups, the team was able to reach proof of concept and eventually create an absence of voltage tester that performed exactly as they hoped. All that was left was for the new AVT product category to be defined in an industry standard and for the safety requirements to be published. In 2016, UL published the first-ever AVT safety and listing requirements in UL 1436.  In 2017, the VeriSafe AVT was released and now offers workers an easy, safer way to get positive proof the system is de-energized before accessing or working on electrical equipment.

Now all it takes is a press of the test button, and a moment to wait for the green light. And, as everybody knows, green means go.


Learn more about the VeriSafe AVT    

The Power to Provide Positive Proof

Recognizing the need for a safer and easier way to verify a circuit is de-energized, our engineers needed to find a way to eliminate exposure to live circuits – either by accident or during an absence of voltage test. The idea was a self-powered, self-testing, permanently-mounted device that would emulate the traditional handheld testing process, without the need to open cabinets. Being self-powered and capable of testing its own connections, the AVT would be the first of its kind to give positive proof the circuit was de-energized.