Arc Flash Safety and the Importance of AR Clothing: A Conversation with Heath Hunter, Head of Industrial Sales at Ariat

Wearing the right protective gear is critical to workplace safety, especially in industries dealing with electrical hazards. Ariat is at the forefront of developing innovative arc-rated (AR) and flame resistant (FR) clothing that keeps workers safe and comfortable on the job. We sat down with Heath Hunter, Head of Industrial Sales at Ariat, to discuss the latest OSHA guidance for AR, the importance of protective apparel, and what makes Ariat AR clothing stand out.

What is an arc flash?

An arc flash is an electrical explosion that releases a bright flash that can reach temperatures of 350,000°F—four times hotter than the surface of the sun—so the need for proper protection can’t be overstated. They can be caused by faulty equipment, dust buildup, improper maintenance, or simply user error. It’s a serious hazard, with up to 30,000 arc flashes occurring annually, leading to thousands of burns, hospitalizations, and, unfortunately, fatalities. 

Tell us about the new OSHA guidance for AR.

In November 2024, OSHA updated the NFPA 70E standard, which has been around for over 20 years. The latest policy mandates that anyone working on energized parts at 50 volts or higher must wear AR clothing. This is a big deal because it broadens the requirement to ensure that more workers are properly protected.

Why is it important, and who does it impact?

The new OSHA guidance affects a wide range of industries, including utilities, construction, oil and gas, and electricians working in any environment where arc flash hazards exist. These regulations help ensure that workers have the correct PPE (Personal Protective Equipment) to reduce burn injuries and improve overall safety.

What PPE is required for arc flash protection?

PPE requirements depend on the risk category, measured in calories per square centimeter (cal/cm²). As you go up into heavier-weight garments, like hoodies and outerwear, you get into categories three and four based on the calories per square meter. OSHA outlines four categories:

Category 1: Offers essential protection with a minimum arc rating of 4 cal/cm², suitable for low-risk environments.

Category 2: Provides a higher level of protection, with a minimum arc rating of 8 cal/cm².

Category 3: Delivers an even higher level of protection, with a minimum arc rating of 12 cal/cm².

Category 4: For the highest level of protection, with a minimum arc rating of 25 cal/cm².

What is the difference between AR and FR clothing?

AR stands for arc-rated, meaning the clothing is designed to protect against arc flashes and has been tested for arc thermal performance. FR, or flame-resistant, refers to materials that self-extinguish when exposed to flames. While all AR garments are FR, not all FR garments are AR-rated. AR clothing is mainly used in electrical and utility work, whereas FR clothing is common in oil and gas industries to protect against flash fires. Dual-certified clothing is designed for both flash fire and arc flash protection.

How does AR PPE protect you?

The main purpose of AR and FR clothing is to self-extinguish in the event of an arc flash or fire, preventing severe burns. 90% of our garments cover 80% of the risks that are out in the space today. That's extremely good. It’s not bulletproof, but it significantly reduces injury risk and increases survival rates. Our ultimate goal is to ensure workers return home safely at the end of the day.

What makes Ariat AR clothing unique?

Ariat took a fresh approach to AR/FR apparel. Historically, protective clothing was bulky, heavy, and uncomfortable. We changed that by integrating stretch fabrics, lightweight materials, and fashion-forward designs without compromising safety. Our denim and woven fabrics are among the most comfortable on the market, making it easy for workers to transition from the job site to everyday life without changing clothes. 

What are some of your favorite Ariat FR products?

Our FR denim is a game-changer. They look and feel like your favorite pair of jeans but provide top-tier protection. Hoodies and baselayers from our Primo Collection look and feel like something you would wear out and about. They all have great stretch, and the hoodie even has a hidden pocket that keeps your phone from falling out when you bend and move. 

Closing Thoughts

At Ariat, safety, innovation, and comfort go hand in hand. With new OSHA regulations in place, it’s more important than ever to ensure everyone has the right protective gear. Ariat offers comfortable, innovative, and protective men’s FR clothing and women’s FR clothing—because, at the end of the day, we want you to get home to your family, which is why we’ll continue to lead the way in this space.

Dive deeper into the industry-changing OSHA PPE guidelines and learn more about what makes Ariat AR clothing stand apart from the rest in our interview with Heath Hunter, Head of Industrial Sales.

Frequently Asked Questions

What PPE is required for electrical work?

Workers need to wear AR-rated clothing, insulated gloves, safety glasses, and protective footwear. Additional gear, such as face shields and rubber-insulated tools, may be required depending on the hazard level.

What shoes do you wear as an electrician?

Look for slip-resistant, durable options that keep you comfortable and protected. Electricians should wear EH-rated (Electrical Hazard) work boots with non-conductive soles to reduce the risk of electrical shock. 

What type of fabric should electricians wear?

Electricians should wear AR and FR-rated fabrics, such as treated cotton or inherently flame-resistant materials, to reduce burn risk in case of an arc flash. Lightweight, breathable, and moisture-wicking options enhance comfort while maintaining safety.