Arc Flash Protection: A Practical Guide for Safety Managers

Arc flash protection: A practical guide for safety managers

June 15, 2026
By PIP Global Safety, for the Blue Print

Arc flash incidents are among the most serious electrical hazards in the workplace. When electrical current leaves its intended path and travels through the air, either between conductors or to ground, it can create an arc flash event that can cause severe injury or death. Arc flash temperatures can exceed 35,000°F, making even brief exposure extremely dangerous.

For safety managers, understanding and controlling this risk is critical to protecting workers, maintaining compliance, and reducing the potential for incidents.

What drives arc flash severity?

The severity of an arc flash injury is primarily influenced by:

Worker proximity to the arc source
Available fault current and system voltage
Duration of the exposure (how quickly the circuit is interrupted)

These variables determine the level of incident energy a worker may experience. Higher energy exposure increases the likelihood of serious burns, blast pressure injuries, and secondary hazards.

Common arc flash hazards

Arc flash events can produce:

Extreme heat and thermal burns
Fire ignition
Explosive pressure waves
Flying debris and molten metal
Intense sound blasts

These hazards often occur simultaneously, reinforcing the need for layered controls and proper Personal Protective Equipment (PPE).

Risk assessment and NFPA 70E requirements

NFPA 70E provides the framework for managing electrical safety risks, including arc flash. A compliant program requires a formal arc flash and shock hazard assessment, performed by a qualified person with the appropriate knowledge and expertise.

This assessment establishes:

Incident energy levels at specific equipment
Arc flash boundaries
Required PPE for each task or location

As a safety manager, ensuring these assessments are current, and aligned with system changes, is essential for effective hazard control.

Understanding arc flash and shock boundaries

Arc flash boundaries define safe approach distances and required protective measures. These zones move from lower to higher risk:

1. Flash Protection Boundary (Outer Limit)

The distance where incident energy equals 1.2 cal/cm²
Exposure at this level can cause a second-degree burn on unprotected skin
Workers must wear appropriate PPE and be supervised by qualified personnel to cross this boundary

2. Limited Approach Boundary

Marks the distance where a shock hazard exists
Access is restricted to qualified personnel or escorted individuals
Barriers and controls should be in place to prevent unauthorized entry

3. Restricted Approach Boundary

Indicates a higher level of shock risk
Only qualified workers with appropriate PPE may enter
Requires strict adherence to procedures and controls
Represents the closest safe working distance, where additional protective measures and strict controls are required

Energized work controls

When work must be performed within restricted boundaries, NFPA 70E requires a documented Energized Electrical Work Permit (EEWP). This ensures:

Hazards are clearly identified
Justification for energized work is documented
Controls and PPE requirements are predefined
Management approval is obtained

Safety managers play a key role in enforcing this process and limiting unnecessary energized work.

Equipment evaluation and labeling

Electrical equipment operating at 50 volts or higher that may present an arc flash or shock hazard should be evaluated for:

Arc flash risk
Shock protection boundaries
Required PPE

Following evaluation, arc flash warning labels must be applied and clearly visible. These labels provide critical, job-specific information that helps workers make informed safety decisions before interacting with equipment.

PPE requirements for arc flash protection

Effective protection depends on selecting PPE that matches the assessed hazard level. Key categories include:

Arc-rated clothing (shirts, pants, coveralls, suits)
Face and head protection (arc-rated face shields, hoods, helmets)
Hand protection (rubber insulating gloves with leather protectors, as well as
arc-rated hand protection where applicable)
Foot protection (electrically rated footwear)

PPE should always be used as part of a broader safety strategy, not as a substitute for hazard elimination or engineering controls.

Key takeaways for safety managers

Ensure arc flash assessments are current and accurate
Verify all equipment is properly labeled
Enforce strict adherence to approach boundaries and permits
Provide and maintain appropriate PPE
Prioritize de-energization whenever possible

Proactive management of arc flash risks not only ensures compliance with NFPA 70E, but more importantly, protects workers from one of the most dangerous hazards in industrial environments.

Content originally from PIP Global Safety. Reused here with permission.