What the New OSHA Guidance Means for LV, MV, and HV Electrical Systems
In 2025, OSHA released its first major arc-flash hazard guidance update in nearly 20 years, reshaping how organizations approach electrical safety. For industries working with low voltage (LV), medium voltage (MV), and high voltage (HV) systems, this update is not just regulatory—it’s a roadmap to saving lives.
What’s New in OSHA’s Guidance?
The new standards emphasize a risk-based approach to electrical safety. Employers must now conduct formal arc-flash risk assessments, supported by accurate fault current calculations and updated one-line diagrams. This ensures protective devices operate correctly, minimizing dangerous fault-clearing delays.
OSHA also aligns more closely with NFPA 70E and NFPA 70B, requiring documented Electrical Safety Programs (ESP), routine equipment maintenance, and comprehensive worker training. Importantly, arc-rated PPE requirements are clearer than ever—workers exposed to arc hazards must be provided with appropriate clothing, gloves, and face protection matched to calculated incident energy levels.
Why This Matters
Arc flashes can generate temperatures hotter than the sun, blast waves strong enough to throw workers, and molten metal capable of severe burns. OSHA’s renewed focus makes it clear: electrical safety is an employer’s responsibility. Failing to comply risks not only regulatory penalties but also devastating human and financial consequences.
Action Steps for Safety Leaders:
- Update arc-flash studies for all LV, MV, and HV systems.
- Audit PPE inventory to ensure compliance with new categories.
- Revise safety programs to align with NFPA standards.
- Train employees regularly on recognizing hazards and responding to emergencies.
The latest OSHA guidance is more than a compliance checklist—it is a call to strengthen workplace safety culture. By investing in risk assessments, PPE, and training, organizations can reduce incidents, protect their workforce, and ensure long-term operational resilience.
