The safe way to verify the absence of voltage.

Panduit VeriSafe

2018 Engineers’ Choice Award VeriSafe won for Safety in the Machine Safety category.

VeriSafe Absence of Voltage Tester uses active visual indicators that convey the status of voltage inside electrical equipment before it is accessed, reducing exposure to electrical hazards and protecting workers.

VeriSafe™ Absence of Voltage Testers

  • Reduce the risk of exposure to electrical hazards for improved worker safety
  • Reduce testing procedure time and complexity to improve productivity
  • Supports compliance when used as part of the lockout/tagout process described in NFPA 70E

What VeriSafe is

  • VeriSafe is a tester, not just an indicator

What is an Absence of Voltage Tester?

Absence of Voltage Testers (AVTs) are permanently-mounted test devices used to verify a circuit is de-energized prior to opening an electrical enclosure.

  • Verify the absence of phase-to-phase and phase-to-ground AC and DC voltage
  • Built-in test circuit verifies operation on a known voltage source before and after absence of voltage test
  • Contain provisions to ensure tester is properly installed and in direct contact with the circuit at time of testing
  • Utilize active indications and functional safety principles
  • Automated test sequence helps reduce operator errors
  • Listed to UL 1436

Video Demonstration

Significance of Verifying the Absence of Voltage

  • 24,000 electrical injuries in the US workplace (2003-2012)[1]
    • 35% due to contact with wiring, transformers, or other electrical components[1]
    • 60% of incidents with key words “electric arc” and “burn” occurred at low voltages (<1000V), with the majority on three phase systems[2]

[1] US Department of Labor, “Bureau of Labor Statistics Occupational Injuries and Illnesses,” [Online]. Available: [Accessed 16 April 2015].
[2] C. M. Wellman, “OSHA Arc-Flash Injury Data Analysis,” in 2012 IEEE IAS Electrical Safety Workshop, Daytona Beach, FL, 2012.

What really happens…

  • Verifying the absence of voltage is a critical task that is part of almost every job
  • Over a 5-year period[1]
    • 18% of the facilities surveyed had a personal injury resulting from use of a voltage test instrument
    • 37% reported near misses
    • 12% experienced plant interruptions
  • When electricians and technical personnel at a large chemical company were asked, “How do you test for the absence of voltage?” more than 90% did not know how to perform a thorough test.[2]

VeriSafe - 55% experienced a voltage testing injury or near miss with handheld testers

[1] H. L. Floyd and B. J. Nenninger, “Personnel Safety and Plant Reliability Considerations in the Selection and Use of Voltage Test Instruments,” IEEE Transactions on Industry Applications, vol. 33, no. 2, pp. 367-373, 1997.
[2] K. Crawford and N. K. Haggerty, “Test Before Touch: Seems Easier Said Than Done,” IEEE Industry Applications Magazine, pp. 32-39, May/June 2008.

Use an adequately rated test instrument to test each phase conductor or circuit part to verify it is de-energized. Test each phase conductor or circuit part both phase-to-phase and phase-to-ground. Before and after each test, determine that the test instrument is operating satisfactorily through verification on a known voltage source.

- Step (5) of NFPA 70E Article 120.1: 2015 Edition

VeriSafe – Key Features and Benefits

  • Improved Safety & Risk Reduction
    • Determine voltage status BEFORE equipment is accessed
    • Prevents direct exposure to electrical hazards
  • Increased Productivity
    • Easy to use, initiate test with the push of a button
    • No additional tools required
    • Provides visual alert to abnormal power conditions
  • Reliable Results
    • Fail-safe design with active indications
    • Safety functions meet SIL 3 per IEC 61508-1
  • Simplified Process for Easier Compliance
    • Automated test sequence based on the steps in NFPA 70E for verification of an electrically safe work condition
    • Automated test helps reduces operator errors
  • Flexible Applications
    • Designed for testing three-phase circuits up to 600V
    • Install on line or load side of electrical disconnect
    • Detects presence of AC and DC voltage

How can we help you?

If you are looking to automate the voltage verification process for control panels, contact us to learn more about the VeriSafe Absence of Voltage Tester.

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Useful Resources

Ideal Applications

  • Equipment with a single source of incoming power
  • High risk associated with access
    • Frequently accessed equipment
    • High incident energy
  • Remote or difficult to access locations
    • Outdoor, mezzanine, catwalk
  • Sites with temporary or intermittent power
  • Equipment with stored electrical energy
    • VFDs, capacitors, etc.
  • Equipment frequently serviced by third-party technicians or contractors