Critical Update Overhead Crane Grounding

Wolter Inc. wants to ensure you stay informed about significant updates related to overhead crane grounding requirements, especially considering recent safety developments.

Key Points:

1. NEC Mandate (2005): Since 2005, the NEC mandates all overhead cranes to have a grounded power bar or festooning to prevent potential electrocution hazards.
2. Fourth Ground Bar: Compliance now requires the inclusion of a fourth ground bar on overhead crane systems. This is a crucial update.
3. Misconceptions and OSHA Clarifications: There's often confusion around unpainted steel bridge rails negating the need for a ground bar. However, various factors like bad bearings, corrosion, and dirty rails can interfere with proper grounding.
4. NEC Code Article 610.61: This article explicitly requires a separate bonding conductor for compliance, stating that the trolley and bridge frames shouldn't be considered electrically grounded through the wheels.
5. Grandfather Clause Clarification: The "grandfather clause" (OSHA 1910.179(b)(2)) applies only to design specifications, not installation. Older cranes must comply with current grounding requirements during installation.
6. Compliance Solutions: Upgrading power bar systems usually requires a fourth rail of grounded power bar and new collector shoes. The grounded power bar must be green.
7. Consultation and Compliance: Always consult with local, state, or federal OSHA offices for further guidance on OSHA laws.
8. Wolter Inc. extends our gratitude for your focus on this matter and your continued dedication to ensuring workplace safety.

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