Without a formal arc flash risk assessment, which is rare for residential work, panels won’t have labels indicating arc flash and shock risks. In such cases, electricians must use the NFPA 70E tables method to determine if AR clothing and PPE is required. In Article 130, Table 103.7(C)(15)(a) specifies that work on panel boards or other equipment rated at 240 volts and below, requires a minimum of CAT 1 PPE, which includes a minimum of 4 cal/cm² arc-rated clothing as shown in Table 130.7(C)(15)(c). Keep in mind that OSHA has viewed the NFPA 70E as the primary consensus standard since 1983 and uses it to support their citations for violations.

Low Voltage Is Not Low Risk

Many electricians mistakenly believe that low-voltage systems pose minimal risks, but consider these facts:

• Arc flash incident energy is influenced by amperage, cycle time, and worker distance—NOT just voltage.
• Low voltages can sustain arc flashes, discharging molten metal (usually copper, steel, and aluminum) at temperatures between 1,900°F and 2,500°F—hot enough to burn, melt, or vaporize anything within three feet.
• Skin burns at just 140°F. Clothing ignites at temperatures between 400°–800°F.
• Most arc flash burn injuries and fatalities are the result of flammable clothing ignition—not the arc itself.

With an influx of new electrical workers entering the field, OSHA’s updated guidance aims to dispel the dangerous myth that low-voltage work does not require AR clothing and PPE. Even at low voltage, the risk is real. Strict safety measures must be implemented and followed to achieve compliance and true protection. To emphasize the danger of wearing flammable clothing while performing electrical work, OSHA’s overriding message is, “Don’t wear fuel.”

A Real-Life Warning: The Dangers of Complacency

Jason Brozen, Tyndale’s Lead Corporate Safety and Technical Trainer, knows firsthand the lethal potential of low-voltage work. He was working on 120/208V equipment when an arc flash nearly killed him, leaving him in the ICU for two weeks and off work for seven months. AR protective clothing serves as the last line of defense where arc flash risks exist. Fortunately, modern AR daily wear is comfortable, stylish, and protective, meaning you don’t have to sacrifice safety for comfort – no matter the voltage.

Tools for Protecting Your Team

Ensuring you and your team are properly equipped with AR clothing is essential for staying safe on the job. Browse our selection of protective apparel and access valuable safety information to help you work with confidence.