What Is an Arc Flash?

An arc flash occurs when an electrical current leaves its intended path and travels through the air between conductors or to the ground. This electrical fault generates a rapid release of energy that produces extreme heat, intense light and catastrophic pressure. Temperatures can exceed 35,000° F, nearly four times hotter than the surface of the sun.

The superheated air creates an explosive blast that vaporizes metal components, sending molten shrapnel at speeds exceeding 700 mph. The pressure wave alone can rupture eardrums and throw workers across a room.

Common triggers for an arc flash include:

• Accumulated dust or debris on energized parts

• Dropped tools that create unintended contact

• Corroded connections

• Insulation breakdown

While the terms are often used interchangeably, an arc flash and an arc blast are not the same. An arc flash specifically describes the thermal burn hazard, while arc blast refers to the accompanying pressure wave and projectile dangers.

Understanding the Risk: Why Compliance Matters

According to recent data, 70% of workplace electrical fatalities occur among workers in non-electrical occupations who encounter energized equipment during routine tasks, including painters, general laborers and maintenance technicians. Injuries range from third-degree burns to permanent vision loss and hearing damage.

Federal regulations set by the U.S. Department of Labor and the Occupational Safety and Health Administration (OSHA) establish clear obligations for employers to keep workplaces free from recognized electrical hazards. The standard for meeting this requirement is NFPA 70E: Standard for Electrical Safety in the Workplace, with Canadian operations following CSA Z462.

Conducting an arc flash hazard analysis is not discretionary — it's a facility owner's legal responsibility. Failure to assess and control these hazards exposes organizations to citations, fines and liability in the event of an incident.

Implementing a Culture of Electrical Safety

Arc flash management requires treating electrical safety as an active program integrated into daily operations and maintenance planning. The hierarchy of control provides a framework for continuously reducing risk. They include:

• Elimination

• Engineering

• Administrative measures

• Personal protective equipment (PPE)

Power Solutions Group serves as your end-to-end partner throughout this life cycle. Our team provides comprehensive arc flash and electrical safety training using current industry calculation methods. Our engineered practical mitigation solutions are tailored to your unique operational constraints. We deliver arc flash study and mitigation services that prepare your personnel to work safely around energized systems.

Partner With Power Solutions Group for Total Safety

A safe facility is a reliable facility. We encourage you to review your current electrical safety program to identify gaps in compliance and opportunities to reduce incident energy exposure. Contact our team to schedule an arc flash study or explore our upcoming training sessions.