Arc flash is one of the most dangerous hazards in electrical work — far more dangerous than a typical electric shock. Understanding what it is and wearing the right personal protective equipment (PPE) can be the difference between a near-miss and a life-changing injury. This guide explains the hazards of arc flash and the essential PPE for electrical work.
Why Arc Flash Is So Dangerous
An arc flash generates temperatures up to 19,000°C — roughly four times hotter than the surface of the sun. Its main dangers are:
- Extreme heat: hot enough to melt metal and burn skin from a distance.
- Explosive force: from rapidly expanding air and vaporized metal (the arc blast).
- UV radiation: intense enough to cause temporary or permanent blindness.
Essential PPE for Electrical Work
Protecting workers from arc flash requires a coordinated set of PPE:
- Face shields and hard hats: made from heat-resistant polycarbonate.
- Flame-resistant clothing: rated with an appropriate Arc Thermal Performance Value (ATPV) for the hazard level.
- Insulating gloves: tested for the correct voltage class and worn with leather outer gloves for mechanical protection.
- Electrical-hazard footwear: non-metallic construction with insulating soles.
Choose PPE to Match the Hazard Level
Proper PPE selection based on the specific hazard level of the work is critical. Under-rated equipment gives a false sense of safety. Always source PPE from reliable suppliers who provide internationally-certified products.
Get Certified Arc Flash PPE from TETA Intertrade
TETA Intertrade supplies internationally-certified electrical safety equipment — arc-rated face shields, flame-resistant clothing, insulating gloves, and electrical-hazard footwear — matched to the hazard level of your work. Protect your team with compliant PPE from a trusted supplier.
Frequently Asked Questions (FAQs)
How is arc flash different from an electric shock?
An electric shock is current passing through the body, while an arc flash is an explosive release of energy that produces extreme heat (up to 19,000°C), a pressure blast, and intense UV radiation — causing burns, injuries, and blindness even without direct contact.
What does ATPV mean on flame-resistant clothing?
ATPV (Arc Thermal Performance Value) rates how much thermal energy the clothing can protect against. Choose clothing with an ATPV suited to the hazard level of the specific task.
Do I need special gloves for arc-flash work?
Yes. Use insulating gloves tested for the correct voltage class, worn with leather outer gloves to protect them from mechanical damage.
Why does footwear need to be non-metallic?
Non-metallic, insulating-soled footwear prevents the shoe from becoming a conductive path, reducing the risk of electric shock during electrical work.
