How Often Should You Update Your Arc Flash Study?

An arc flash study isn’t a one-and-done project. Electrical systems change over time — and those changes can make your original study inaccurate. The question many safety managers ask is: “How often do we need to update our arc flash study?”

The NFPA 70E Requirement:

According to NFPA 70E, arc flash studies must be reviewed and updated at least every 5 years. But that’s the minimum. In many cases, you’ll need to update sooner.

When to Update Your Study Sooner:

• System Upgrades: Adding new machinery, panels, or breakers.

• Service Changes: Utility feed adjustments or transformer replacements.

• Protection Device Settings Changed: Even minor changes in breakers, fuses, or device settings can alter results. That dial you adjusted to eliminate the nuisance trip just invalidated your arc flash label.

• Accidents or Near Misses: Any electrical event should trigger a review.

  
  

Why Updates Are Important:

• Accuracy = Safety: Outdated studies can leave workers under-protected.

• Compliance: OSHA can cite companies if their arc flash data is outdated.

• Insurance Requirements: Some insurers require up-to-date electrical safety studies.

  
  

Tip:

Even if no major changes occur, scheduling a review every 3–5 years keeps your program aligned with best practices.

Arc Defense can help you determine if your study needs updating — and provide a plan that fits your budget. Schedule your review today.