How GracePESDs Indicate Presence of Voltage

Posted by Nick Schiltz on July 22

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GracePESDs Role in Electrical Safety

It’s no secret that our Permanent Electrical Safety Devices (PESDs) greatly assist with a more productive and safer Lockout/Tagout (LOTO) procedure. But how and when each device is best suited for each step of the process may require some clarification. For starters, our GracePESDs voltage indicators are best suited for verifying presence of voltage. This is visually represented by flashing or non-flashing LED lights from the device that is hardwired to the load side of an electrical feeder or disconnect switch.

However, when the lights are no longer illuminated, this is not to be considered an accurate representation for absence of voltage. In order to verify, absence of voltage, a qualified person must go beyond visual verification and perform a metered test, which is where our Safe-Test Point and Voltage Test Station PESDs would come into play.

Failure to perform proper mechanical or electrical Lockout/Tagout can lead to electrocution, electrical shock, arc-flash, and other hazards. In addition to huge penalties by OSHA for non-compliance, these hazards often result in lost time wages, compensation claims, permanent disability, and fatalities. One of the highest risk factors involved in these incidents is human error. Voltage indicators from GracePESDs aim to assist in behavior around live voltage. Which is why our voltage indicators provide a visual representation of energy presence to mitigate these risks. You be believe energy has been isolated, but without a voltage indicator you won't know until it's too late which can then result in catastrophic ramifications for all parties involved.

Voltage indicator PESDs are self-powered, UL listed, and permanently installed devices that visually represent the presence of voltage with flashing or non-flashing, redundant LED lights. Typically hardwired to the load side of an electrical feeder or a disconnect switch, voltage indicators illuminate whenever hazardous voltage is present in any individual phase. These devices, when installed by a qualified electrician, go beyond compliance to assist task qualified personnel with enhanced productivity and reduced risk while performing mechanical LOTO tasks by verifying energy presence.

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For more information on our voltage indicators, you can click on the above image to view our datasheet and also click here to explore GracePESDs on our website. Also, be sure to contact our sales team at and we’ll help you select the right PESD for your application today. If you'd like further clarification on presence vs. absence of voltage testing, download the article below:

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Download Absence of Voltage Testing Article

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