Structural earthing connections bond metallic building elements to the grounding system for electrical safety and lightning protection.

Purpose

• •Safety: Prevents touch voltage hazards
• •Lightning protection: Provides path for lightning currents
• •EMC: Reduces electromagnetic interference
• •Fault protection: Ensures protective device operation

Connection Methods

• •Bolted connections: GI or copper flats with bolts
• •Exothermic welding: Permanent molecular bond
• •Clamp connections: Adjustable pressure clamps

Design Standards

• •IEEE 80 for substation grounding
• •IEC 62305 for lightning protection
• •IS 3043 for earthing practice

Maintenance

• •Annual visual inspection
• •Continuity testing during shutdown
• •Corrosion monitoring and treatment