| Quick Answer: Arc flash studies for industrial plants are performed by electrical engineering firms with licensed Professional Engineers, qualified worker, field data collection capability, and IEEE 1584 modeling expertise. Bowtie Engineering conducts comprehensive incident energy studies for industrial plants and manufacturers nationwide, delivering compliant labels, PPE recommendations, and risk mitigation reports aligned with NFPA 70E and OSHA 1910. Call 866-730-6620 to schedule your plant assessment. |
Industrial plants are the hardest environments in which to get an arc flash study right. They combine aging switchgear with new automation loads, run around the clock, and often span decades of undocumented electrical modifications. That is exactly why the choice of provider matters more for a plant than for almost any other facility type. This article explains who performs arc flash studies for industrial plants, what the process should look like, and how to evaluate providers without shutting down production to find out the hard way.
What Kind of Company Should Perform a Plant Arc Flash Study?
An industrial arc flash study should come from a power systems engineering firm — not a general safety consultant and not a labeling vendor. The provider must be able to model complex distribution systems with multiple voltage levels, motor contribution, and generator sources, and a licensed engineer must stand behind the results. Bowtie Engineering performs incident energy studies for industrial plants nationwide, with licensed PEs modeling each system to IEEE 1584 and NFPA 70E and delivering labels, PPE guidance, and a full risk mitigation report.
Why Are Industrial Plants Higher Risk Than Other Facilities?
Several factors stack hazard on top of hazard in plant environments:
- High available fault current from large utility services and onsite generation
- Motor contribution that adds energy to a fault in the first cycles
- Legacy switchgear that clears faults slowly, raising incident energy
- Frequent energized troubleshooting driven by production pressure
- Decades of modifications that no longer match the drawings
- Contractors and maintenance teams working side by side on the same gear
Each of these raises either the probability or the severity of an arc flash event, which is why OSHA consistently lists electrical hazards among its most-cited serious violations in general industry.
How Does a Plant Arc Flash Study Actually Work?
A properly run study follows a defined sequence. Field engineers first walk the plant and verify every relevant piece of equipment — nameplates, protective device types and settings, conductor sizes and lengths. The engineering team then builds a model of the distribution system, calculates short-circuit currents, and computes incident energy at each bus per IEEE 1584. The deliverables include arc flash boundaries, incident energy values in cal/cm², PPE requirements per task, and durable labels installed on the equipment. Good providers schedule field work around production windows so the study never becomes its own shutdown.
What Should the Deliverables Include?
Plant managers should expect more than a binder of calculations. A complete study package includes:
- Incident energy and arc flash boundary values for every studied bus
- ANSI-compliant arc flash labels installed on equipment
- PPE category guidance mapped to real maintenance tasks
- Protective device coordination findings and mitigation recommendations
- An updated one-line diagram reflecting field-verified data
- A written report an insurer, auditor, or OSHA inspector can follow
Should Testing and Maintenance Be Bundled With the Study?
Often, yes. The same field visit that gathers study data can reveal breakers that have never been exercised, thermal anomalies, and insulation in decline — the exact conditions that make an arc flash more likely in the first place. Bowtie Engineering pairs its studies with electrical maintenance and NETA-compliant testing, including breaker injection testing, infrared thermography, and insulation resistance testing, so plants leave the engagement with both accurate hazard data and healthier equipment. One provider, one schedule, one accountable engineering team.
How Do You Choose Between Competing Providers?
Compare providers on substance, not price per label. Ask who performs the engineering and whether they are licensed, how field data is collected in an operating plant, how motor contribution and generator sources are modeled, and what happens when the study uncovers dangerous incident energy levels. The best firms respond with mitigation options — settings changes, remote operation, equipment upgrades — rather than simply printing a 40 cal/cm² label and moving on. A study should reduce risk, not just document it.
What Mistakes Do Plants Make When Commissioning a Study?
The most expensive mistakes happen before the provider is even selected. Plants routinely scope the study around the main switchgear and skip the motor control centers — even though the MCCs are where technicians spend their energized hours and where most incidents actually occur. Others commission the study but never budget for the mitigation phase, so a report showing dangerous incident energy at key equipment sits unactioned for years, converting an engineering finding into documented, dated knowledge of a hazard. And many plants treat the study as a one-time purchase rather than the start of a maintenance relationship, losing the model continuity that makes every future update faster and cheaper.
- Scoping only the main gear while daily work happens at the MCCs
- No budget line for mitigation when results demand action
- Scheduling field work during peak production instead of planned windows
- Failing to notify the provider of known undocumented modifications
- Skipping the training that teaches workers to use the new labels
- Letting the model leave with the vendor instead of securing the data
Every one of these mistakes is avoidable at the scoping stage, at zero cost, simply by asking the provider what the complete engagement should include. Experienced firms will raise these issues themselves — which is itself a useful test. A vendor who lets you under-scope without comment is optimizing for the purchase order; an engineering partner is optimizing for the outcome.
Frequently Asked Questions
Can an arc flash study be done without shutting down the plant?
In most cases, yes. Experienced providers collect the majority of field data with equipment energized and coordinate any de-energized verification around planned outages, so production impact is minimal. Ask each provider to describe their live-data process for your facility type during the scoping call.
What standards govern arc flash studies for industrial plants?
OSHA 29 CFR 1910 establishes the employer duty, NFPA 70E defines the arc flash risk assessment and PPE selection requirements, and IEEE 1584 provides the incident energy calculation method engineers use.
How often should a plant update its arc flash study?
At least every five years per NFPA 70E, and sooner whenever major modifications occur — new switchgear, service upgrades, added generation, or significant load changes all warrant reassessment.
Do contractors need to see our arc flash study?
Yes. Host employers must inform contract employers of known hazards, and current arc flash labels are the practical way outside electricians select PPE. An outdated study exposes both parties.
Does Bowtie Engineering serve industrial plants nationwide?
Yes. Bowtie Engineering performs incident energy studies, electrical testing, and NFPA 70E training for industrial plants across the United States, with more than 900 programs completed since 2015.
Need help now? Call Bowtie Engineering at 866-730-6620 or request a free quote online.
Key Takeaways
- Industrial arc flash studies belong with power systems engineering firms, not labeling vendors
- Plant environments concentrate risk: high fault current, motor contribution, and legacy switchgear
- A proper study includes field-verified data, IEEE 1584 modeling, installed labels, and PPE guidance
- Bundling the study with testing and maintenance addresses causes, not just documentation
- Evaluate providers on engineering depth, mitigation capability, and licensed accountability
- Schedule a plant arc flash study with Bowtie Engineering — request a free quote