--- title: "Arc Flash 101: A Hidden (and Explosive) Electrical Danger in Water Infrastructure" description: Learn how water and wastewater utilities can prevent arc flash hazards through electrical safety practices, risk assessments, PPE, and NFPA 70E compliance. --- Share this ArticleLike this article? Email it to a friend! Friend's Email Address Your Name Your Email Address Comments Send Email Email sent! ![facebook](https://www.facebook.com/tr?id=314229042108894&ev=PixelInitialized) [** Back to All Blog Posts](https://info.wesslerengineering.com/blog) # Arc Flash 101: A Hidden (and Explosive) Electrical Danger in Water Infrastructure [Facebook0](https://www.facebook.com/sharer/sharer.php?u=https://info.wesslerengineering.com/blog/arc-flash-nfpa70e-ppe&display=popup&ref=plugin&src=share_button) [Tweet0](https://twitter.com/share?url=https://info.wesslerengineering.com/blog/arc-flash-nfpa70e-ppe&text=MS4%20Training%20%E2%80%93%20Pollution%20Prevention%20%26%20Good%20Housekeeping%20Part%20I) [LinkedIn0](https://www.linkedin.com/shareArticle?mini=true&url=https://info.wesslerengineering.com/blog/arc-flash-nfpa70e-ppe) [Email0](https://info.wesslerengineering.com/blog/arc-flash-nfpa70e-ppe#shared-counts-email) Posted By Chris Guffey on September 17, 2025 ![Arc Flash: Dangers and Prevention - GSES](https://www.gses.com.au/wp-content/uploads/2020/06/arc_flash_0_e.jpg) When we think about the challenges facing our water and wastewater systems, most of us picture aging pipes, heavy storms, treatment plant upgrades, or an aging workforce. But there’s another hazard that’s less visible — and far more dangerous — for the people who keep our water systems running every day: **arc flash**.  **What Is Arc Flash?**  An arc flash is a sudden and dangerous electrical event where electricity strays from its normal path, often due to a fault in the system, like a short circuit or equipment failure. This fault causes a surge of electrical current that can ionize the surrounding air, turning it into a conductor. As a result, electricity jumps through the air between wires or to the ground, creating a brilliant flash of light, intense heat, and a powerful pressure wave. **Temperatures can climb beyond 35,000°F—hotter than the sun’s surface**—making arc flashes extremely hazardous.  For water and wastewater facilities, this danger is especially relevant. From pumps, control panels, and motor control centers to complex treatment systems, the electrical components that power our critical infrastructure are ***everywhere***.  **Why It Matters in the Water Industry**  Operators, electricians, and maintenance crews often work around energized electrical equipment to keep plants and pumping stations running. Even a simple act — tightening a connection or using a testing probe — can trigger an arc flash if proper precautions aren’t taken.  For utilities, the consequences go far beyond worker injury:  - **Downtime**: An arc flash can destroy panels and switchgear, shutting down pumping stations or treatment processes.  - **Financial costs**: Repairs, medical bills, OSHA fines, and lost production can run into hundreds of thousands of dollars.  - **Community impact**: When water or wastewater systems go offline, the people who rely on them feel the effects immediately.  **Real-World Lessons **  Consider the case of a remote pump station facility where an electrician was troubleshooting a **480-volt motor control center** without shutting it down. A dropped tool caused an arc flash that ignited his clothing and left him with **third-degree burns on 40% of his body**. The company faced destroyed equipment, extended downtime, and OSHA fines.  In another incident, a technician was modifying a control panel with an integral motor starter.  The technician removed a starter from the live control panel and experienced an arc flash that cracked his protective face shield. While his personal protective equipment (PPE) saved his life, he still sustained severe burns on his arms where flame-resistant clothing was missing and resulted in extended downtime due to damage to the control panel.  The lesson is universal: **arc flash prevention is critical wherever electricity powers essential systems**.  **Building a Safer Future**  For the water industry, preventing arc flash isn’t optional — it’s part of protecting both workers and the communities they serve. Prevention includes:  - Performing **arc flash risk assessments** at treatment plants and pumping stations.  - Following **lockout/tagout procedures** to de-energize equipment before service.  - Providing and enforcing the use of **arc-rated PPE and strict standards** for staff and contractors alike. [View this three minute video for an example of what to do, or, really, what NOT to do.](https://www.youtube.com/watch?v=h3c-gCQ5ya4)  - Training operators and electricians in **safe electrical work practices**.  - Maintaining and inspecting electrical systems to **catch problems early**.  ***More Than a Project*****, More Than Prevention**  We believe infrastructure is **more than pipes, pumps, and valves** — it’s about **protecting the people behind the systems** and the communities they serve. By prioritizing arc flash awareness and prevention, water utilities can create safer workplaces, avoid costly downtime, and ensure reliable service for everyone who depends on clean water and safe infrastructure management.   [Click here to read part 2](https://info.wesslerengineering.com/blog/beyond-the-label-building-a-complete-electrical-safety-program) Tags [Arc Flash Safety](https://info.wesslerengineering.com/blog/topic/arc-flash-safety) [Arc Flash](https://info.wesslerengineering.com/blog/topic/arc-flash) [Arc Flash Prevention](https://info.wesslerengineering.com/blog/topic/arc-flash-prevention) ### Subscribe ![](https://www.facebook.com/tr?id=1929122400700835&ev=PageView&noscript=1) ![](https://dc.ads.linkedin.com/collect/?pid=29224&fmt=gif)