Arc Flash PPE Guide: Categories, Requirements and Electrical Safety Protection
An arc flash is one of the most violent hazards an electrical worker can face, a sudden release of heat and energy that can exceed the temperature of the sun's surface, all in a fraction of a second. Anyone who works on or near live electrical panels, switchgear, or distribution boards in India's factories, power utilities and process plants needs to understand this hazard and the PPE that protects against it.
This guide explains what causes an arc flash, the PPE categories used to protect workers, and what Kewalson stocks for electrical safety in Indian workplaces.
What Is an Arc Flash?
An arc flash occurs when an electrical fault causes current to jump through the air between conductors or from a conductor to the ground. This creates an explosive release of thermal energy, intense light, a pressure wave, and molten metal spatter.
Common causes include equipment failure, dust or moisture build-up in panels, dropped tools, loose connections, and working on equipment that has not been properly isolated using a lockout tagout procedure.
The severity of an arc flash is measured in incident energy, expressed in calories per square centimetre (cal/cm²). This figure determines how much thermal protection a worker's PPE must provide and is normally calculated for each piece of equipment through an arc flash risk assessment.
Arc Flash PPE Categories
Electrical safety standards internationally, including the widely referenced NFPA 70E framework, define PPE categories based on the incident energy a worker may be exposed to.
| Category | Approx. Incident Energy | Typical PPE Required |
|---|---|---|
| Category 1 | Up to 4 cal/cm² | Arc-rated shirt & pants, safety glasses, insulated gloves, hard hat |
| Category 2 | Up to 8 cal/cm² | Arc-rated coverall, arc-rated face shield, insulated gloves, hard hat |
| Category 3 | Up to 25 cal/cm² | Arc flash suit jacket & pants, arc-rated hood, insulated gloves, leather boots |
| Category 4 | Up to 40 cal/cm² | Full arc flash suit with hood, multiple PPE layers, insulated gloves & sleeves |
PPE Required for Arc Flash Protection
1. Insulated / Electrical Safety Gloves
Rubber insulating gloves are the single most important piece of PPE for anyone working on or near live electrical equipment. They are rated by voltage class and must always be worn with leather protector gloves over them to guard against cuts and abrasion.
At Kewalson, we stock:
- Vidyut 11 KVA Electrical Safety Gloves
- Vidyut 33 KVA Electrical Safety Gloves
- Raychem Kamfet Seamless Latex Rubber Gloves (Class 00)
- Ansell RIG Electrical Resistant Latex Gloves
For general electrical maintenance where flame and arc exposure is also a risk, the Ansell 80-813 Flame, Cut and Arc Flash Resistant Neoprene Coated Gloves offer combined protection.
Browse the full electrical gloves range at Kewalson
2. Arc-Rated Face and Eye Protection
A standard safety visor does not protect against the intense heat of an arc flash. Arc-rated face shields or hoods, tested to withstand a specific cal/cm² rating, are required for any Category 2 and above task.
3. Flame-Resistant / Arc-Rated Clothing
Ordinary work clothing, especially synthetic fabric, can melt onto the skin during an arc flash. Arc-rated coveralls, jackets, and trousers made from inherently flame-resistant fabric are required for Category 1 tasks and above.
4. Dielectric Helmet and Footwear
A hard hat rated for electrical work (Class E) protects against both impact and electrical shock. Dielectric, non-conductive safety footwear with no exposed metal parts is equally essential.
5. Insulated Tools and Mats
Insulated hand tools rated for the voltage being worked on, along with rubber insulating floor mats at the work location, reduce the risk of an arc-initiating fault.
Complete Arc Flash PPE Guide by Task
| Task | Hazard | PPE Required |
|---|---|---|
| Panel inspection (de-energised, verified) | Residual/incidental | Insulated gloves, safety glasses, hard hat |
| Switching operations on live panel | Moderate arc flash | Arc-rated shirt/pants, face shield, insulated gloves |
| Racking breakers in/out | High arc flash | Arc flash suit, arc-rated hood, insulated gloves & sleeves |
| Switchgear/substation maintenance | Severe arc flash | Full arc flash suit, hood, dielectric boots, insulated tools |
| Live cable jointing | Electrical shock + arc | Insulated gloves (voltage-rated), arc-rated clothing, face shield |
Key Arc Flash Safety Rules for Every Workplace
- Always follow lockout tagout procedures and verify zero energy state before treating equipment as de-energised.
- Ensure every electrical panel carries an arc flash warning label showing the required PPE category.
- Never substitute ordinary cotton or synthetic workwear for arc-rated clothing on live electrical tasks.
- Inspect insulated gloves before every use, check for punctures, cracks, or discolouration, and get them electrically tested at the recommended interval.
- Always wear leather protector gloves over rubber insulating gloves to prevent punctures.
- Train electrical workers specifically on arc flash hazards, not only general electrical safety.
- Maintain a minimum approach distance for unqualified personnel around energised equipment.
Final Thoughts
Arc flash incidents happen in seconds but the injuries last a lifetime. The right combination of insulated gloves, arc-rated clothing, and face protection matched to the correct PPE category for the task is what stands between a routine switching operation and a catastrophic injury.
At Kewalson, we supply certified electrical safety gloves from Vidyut, Raychem and Ansell, along with face shields, dielectric helmets and protective clothing to keep Indian electrical workers safe.
Browse our complete range of electrical safety PPE at Kewalson.
Frequently Asked Questions
Insulated gloves are classified by the maximum voltage they are tested to withstand, such as 11 KV or 33 KV. Always select a glove rated above the system voltage you will be working near and never use a glove beyond its rated class.
Meltable synthetic fabrics worn as a base layer can still cause severe burns even under an arc-rated suit. Cotton or arc-rated base layers are recommended, and all outer layers exposed to a potential arc must be arc-rated.
Rubber insulating gloves used for live electrical work should be electrically tested periodically as per the applicable standard and visually inspected before every single use.
A face shield alone only protects the face and eyes. Depending on the PPE category, workers also need arc-rated clothing, insulated gloves, and higher protection such as a full arc-rated hood.
Kewalson supplies Vidyut, Raychem and Ansell electrical safety gloves, arc-rated clothing components, face shields and dielectric protective equipment for electrical safety across Indian industries.
