Learning path

Knowledge Hub

From lightning concepts to low-voltage power-line SPD products—a structured guide for engineers, panel builders, and local partners.

4. Earthing & Bonding for Protection · Page 3 of 6

Earth Electrodes and Rings

Rods, rings, and foundation earths in lightning contexts.

Electrode types

Rods, tapes, plates, and foundation rebar (ufer) earths are common. Lightning-critical sites often use ring electrodes around structures.

Corrosion & soil

Resistivity and corrosion vary widely between desert sand, clay, and coastal soil. Electrode design and inspection intervals must match the environment.

Measurement caution

A single resistance number is not a complete SPD design. Geometry and bonding often matter more for internal surge voltages.

← Equipotential Bonding Explained

The SPD-to-Earth Path →

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