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| Content | Abstract -– Article 120.1 of the NFPA 70E establishes the procedure for creating an electrically safe work condition. Since this was written, the day-to-day practice of electrical safety has changed going beyond the precise language of Article 120.1(1-6). This is due to the increased usage of permanent electrical safety devices (PESDs) in Lock-out/Tagout procedures. The relatively new concept of permanent electrical safety devices actually improves the workers’ ability to safely isolate electrical energy beyond that which was originally conceived when Article 120 was written. PESDs go beyond the high standard, yet they still adhere to the core principles found in Article 120.1. With PESDs incorporated into safety procedures and installed correctly into electrical enclosures, workers can transition the once-risky endeavors of verifying voltage into a less precarious undertaking that never exposes them to voltage. Since, every electrical incident has one required ingredient – voltage, electrical safety is radically improved by eliminating exposure to voltage while still validating zero energy from outside the panel. Index Terms -– Voltage detectors, voltage portals, non-contact voltage detector, NCVD, power warning alerts, permanent electrical safety devices, voltage detector validation procedures, verification, voltmeters Introduction To employees all safety – especially electrical safety – is personal. Little else matters to them unless electrically safe work conditions can be created and maintained through their work environment. Article 120.1 of the NFPA 70E was, as its title suggests, penned with the important purpose of establishing the “gold standard” for creating an electrically safe work condition. Since then, however, innovation in the realm of electrical safety has surpassed the precise language of Article 120.1(1-6) because it does not speak directly to the value permanent electrical safety devices have in achieving an electrically safe work environment. The relatively new concept of permanent electrical safety devices (PESDs) actually improves the workers’ ability to safely isolate electrical energy beyond that which was originally conceived when Article 120 was written. The forward-thinking concept of PESDs goes beyond the high standard of safety for which competent companies strive, yet they still adhere to the core principles found in Article 120.1. With PESDs incorporated into safety procedures and installed correctly into electrical enclosures, workers can transition the once-risky endeavor of verifying voltage into a less precarious undertaking that never exposed them to voltage. Let’s face it; every electrical incident has one required ingredient – voltage. Electrical safety is radically improved by eliminating exposure to voltage while still validating zero energy from outside the panel. The standard shoulder belt you (hopefully) use each time you are in a vehicle is an improvement on a simple lap belt found in many vehicles of the past. American car manufacturers offered seat belts only as options until Saab introduced them in 1958 as a standard safety element – an act that changed the landscape of passenger safety in vehicles. Later, driver- and passenger-side airbags offered breakthrough safety advances beyond the then-simplistic seatbelt only to later be enhanced by side-impact airbags. Each of these safety innovations relies upon each other for peak functionality and Permanent Electrical Safety Devices Will Verify Zero Electrical Energy Philip B Allen Grace Engineered Products, Inc. Davenport, IA, 52807, USA September 2011 philallen@grace-eng.com |
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