Understanding Arc Flash
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What Is Arc Flash?
Whether you own or manage a business property, arc flash is a serious electrical hazard that can lead to devastating consequences. Arc flash—also known as flashover—is a sudden electrical explosion caused by a short circuit or fault in an electrical system.
With temperatures reaching up to 35,000°F, arc flash incidents can cause severe burns, fires, hearing loss, and even fatalities. Understanding the risks and taking preventive action is crucial to workplace safety.
What Causes Arc Flash?
Arc flash incidents can be triggered by multiple factors, including:
Equipment failure – Aging, damaged, or poorly maintained electrical systems.
Unintentional contact – Accidental connection between live conductors.
Dust and debris – Conductive particles that create electrical pathways.
Corrosion – Weakening of electrical connections over time.
Improper installation – Loose wiring or faulty electrical work.
Human error – Working on live systems without proper precautions.
Who Is at Risk?
Arc flash can happen in any industry where electrical systems are in use, including:
Manufacturing and industrial sites
Commercial and office buildings
Healthcare facilities
Data centers and IT environments
Construction sites
Utility and energy sectors
Even non-electricians working near electrical equipment can be at risk if proper safety measures aren’t in place.
How to Prevent Arc Flash
Eliminating arc flash hazards entirely is challenging, but reducing the likelihood and severity is possible with the right approach. Best practices include:
De-energizing equipment – Powering down systems before performing maintenance.
Arc flash risk assessments – Evaluating electrical hazards every five years or after modifications.
Personal Protective Equipment (PPE) – Ensuring workers wear appropriate safety gear.
Proper labeling – Identifying high-voltage areas with clear warning signs.
Training employees – Educating workers on arc flash risks and safety procedures.
Installing protection devices – Using circuit breakers and fuses to limit electrical faults.
When to Call an Electrician
Contact an electrician if:
It’s been over five years since your last arc flash evaluation.
Your electrical systems are outdated or showing signs of wear.
You’ve recently expanded or upgraded your electrical infrastructure.
You’ve noticed signs like flickering lights, buzzing sounds, or a burning smell near electrical panels.
Coordination Studies: Protect People and Equipment
At CSE, we conduct comprehensive coordination studies to help businesses reduce the risk of arc flash incidents and protect both personnel and equipment. Our process involves analyzing the electrical system to ensure breakers and fuses operate in the correct sequence and timeframe — helping to clear faults fast and reduce arc flash energy levels.
These studies not only improve safety but also help ensure compliance with NFPA 70E and other industry standards. It’s recommended to perform a coordination study every five years or whenever significant changes are made to your electrical infrastructure.
Stay proactive. Protect your facility with a coordination study from CSE today.
Arc flash incidents are largely preventable with the right systems and planning in place. Don’t wait for a costly accident. Let CSE help you reduce risk with expert coordination studies and proven electrical safety solutions.
