Lightning is a natural phenomenon that can pose serious risks to buildings and people. A lightning conductor is a device designed to capture lightning strikes in a designated area and safely redirect the electrical current into the ground. The currents can be extremely powerful, sometimes exceeding 350 kA, so effective protection is crucial to prevent fires, structural damage, and other hazards.

Lightning protection systems are essential for both safety and preservation of structures. There are several types, each suited to different applications and environments.

Conventional Systems (Standard NF EN 62-305)

1. Franklin Rod
Developed by Jacques de Romas and Benjamin Franklin, the Franklin rod is a traditional lightning protection method. It consists of a metal rod installed at the highest point of a building and connected to the ground via down conductors. Under ideal conditions, it protects an area with a radius of up to 30 meters.

Advantages:

• Simple installation
• Cost-effective for small projects
• Can be integrated discreetly in some structures

Disadvantages:

• Limited coverage
• Less practical for large buildings
• Mast strength can be a limiting factor

Best for: Antennas, small houses, small churches, chimneys

Standards: IEC EN 62561 (components), IEC EN 62305-3 (installation)

2. Meshed Cage
Based on the Faraday cage principle, this system surrounds the building with a conductive mesh on the roof and walls. It is connected to grounding loops, and lightning rods may be placed at strategic points. Smaller mesh sizes provide higher levels of protection.

Advantages:

• Reduces electromagnetic effects inside the building
• Maintains equipotentiality between the structure and earth

Disadvantages:

• Complex installation
• Higher material and labor costs

Best for: Data centers, sensitive electrical installations

Standards: IEC EN 62561, IEC EN 62305-3

3. Taut Wire Lightning Conductors
These systems function similarly to meshed cages but are installed above the building, at a distance. Conductive wires are held under tension and connected to grounding points, capturing lightning before it reaches the structure.

Advantages:

• Reduces electromagnetic impact inside the building
• Protects open areas
• Maintains equipotentiality

Disadvantages:

• Installation complexity
• Higher costs
• Visually more noticeable

Best for: Outdoor storage, industrial areas, launch pads

Standards: IEC EN 62561, IEC EN 62305-3

Modern Systems (NF C 17-102)

Early Streamer Emission (ESE) Air Terminal
Originating in France in the 1980s, the ESE system generates an ascending electrical streamer that triggers a lightning strike earlier. This allows the terminal to capture lightning at a higher point and protect a larger area.

There are two types: electronically triggered, which ionizes the air to attract lightning, and geometrically triggered, which relies on the terminal’s shape to guide strikes.

Advantages:

• Captures lightning sooner
• Covers a larger protection area
• Suitable for taller or complex structures

Disadvantages:

• Small projects are slightly less economical
• Strict requirements for the grounding system (ground resistance < 10Ω)
• High requirements for structural mechanics

Standards: NF C 17-102

Lightning Protection Systems Comparison Table

Why Lightning Protection Matters

Lightning may not only strike directly; induced surges can damage electrical systems. Combining physical conductors with surge protection devices (SPDs) ensures equipment and circuits remain safe. SPDs divert dangerous voltage spikes to ground, protecting electronics, automation systems, and communication equipment.

At GA&DA Electric, we provide high-quality surge protection devices suitable for residential, commercial, and industrial applications. Our products are certified to IEC/EN standards, offering reliable protection when integrated into a complete lightning protection plan.

Protect your building and electrical systems today! Explore our complete range of lightning protection solutions and surge protection devices at GA&DA Electric. Our certified products and expert guidance ensure safety and reliability for homes, commercial buildings, and industrial facilities.

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