100 mm Conventional Copper Lightning Arrester – Heavy Duty Lightning Protection
Protect Your Property with a 100 mm Conventional Copper Lightning Arrester
Looking for a reliable and affordable way to shield your home, office, or factory from lightning damage? The 100 mm conventional copper lightning arrester from Thunder Earthing is built to do exactly that.
Crafted with 99.9% electrolytic-grade pure copper bonded onto a high-tensile steel core, this copper lightning arrester intercepts lightning strikes at the rooftop level and channels the massive electrical surge safely into the ground through a dedicated earthing system. The result? Your building, electrical appliances, and the people inside stay protected.
Whether you own a small house or manage a large commercial complex, this lightning arrester is engineered to deliver dependable, low-maintenance protection for 15 to 20 years — all while meeting IS/IEC 62305 international safety standards.
What Is a 100 mm Conventional Copper Lightning Arrester?
A 100 mm conventional copper lightning arrester is a passive lightning protection device. It consists of a vertical copper-bonded steel rod with a 5-spike air terminal mounted at the highest point of a building. When lightning strikes, the arrester intercepts the bolt and conducts the electrical current through a down conductor into the earth, preventing damage to the structure and its contents.
This design is based on the Franklin Rod principle — a proven technology with over 270 years of documented effectiveness.
Core Components:
- Air Terminal (5 Spikes): Copper spikes arranged around a spherical ball to intercept lightning from multiple angles
- Copper Bonded Rod: 100-micron (0.1 mm) electrolytic copper coating molecularly bonded to a high-tensile steel core
- Base Plate: 100 mm × 100 mm mounting platform with 4 bolt holes for secure rooftop installation
- Down Conductor Connection: Terminal designed for a 70 sq mm copper conductor that links the arrester to your earthing system
Technical Specifications
| Parameter | Specification |
|---|---|
| Copper Coating Thickness | 100 micron (0.1 mm) |
| Copper Purity | ≥99.9% (electrolytic grade) |
| Rod Length Options | 1000 mm (1 m) / 1200 mm (1.2 m) |
| Rod Diameter Range | 14 mm - 17.2 mm |
| Air Terminal Configuration | 5 spikes (conventional Franklin rod design) |
| Current Carrying Capacity | 20-30 kA (kilo-amperes) |
| Protection Coverage | 45° cone angle, approximately 2 m radius at ground level |
| Weight (1m length) | 1.35 kg - 2.3 kg (varies by diameter) |
| Operating Temperature | -40°C to +80°C (ambient) |
| Service Life | 15-20 years (typical conditions) |
| Standards Compliance | IS/IEC 62305 (Lightning Protection) |
Key Features and Benefits
99.9% Pure Copper Bonding
The 100-micron electrolytic copper layer is molecularly bonded to the steel core. Unlike electroplated coatings that can peel or flake, this molecular bond is permanent. It delivers 35 times the electrical conductivity of plain steel, which means lightning current is dissipated faster and more efficiently.
Outstanding Corrosion Resistance
Copper naturally forms a protective patina layer (Cu₂O) that shields the metal from atmospheric corrosion. This makes our lightning arrester ideal for coastal regions with salt spray, industrial zones with acidic air, and humid tropical climates. The corrosion rate is 10 to 50 times slower than galvanized iron.
High Current Carrying Capacity
Rated to handle 20–30 kA of lightning current without structural failure or melting. Since the median lightning strike is around 30 kA, this arrester is built to withstand real-world conditions confidently.
IS/IEC 62305 Certified
Fully compliant with IS/IEC 62305 (Protection Against Lightning), NFPA 780, and BS EN 62305. This means it meets insurance requirements and building code mandates across India and internationally.
Long Service Life
Expect 15 to 20 years of reliable performance under typical conditions — no electronics to fail, no batteries to replace, and no active maintenance required.
Where Can You Use This Lightning Arrester?
Homes and Residential Buildings
Perfect for single-family homes, apartments, villas, and gated communities. For a building up to 200 sq m, just 1–2 arresters are typically enough.Commercial Buildings
Office parks, shopping malls, hotels, schools, colleges, and hospitals all benefit from reliable lightning protection — especially in lightning-prone regions.Industrial Facilities
Factories, warehouses, power substations, transformer yards, and telecom towers need robust protection. This arrester handles industrial-grade requirements at a fraction of the cost of ESE systems.Solar and Renewable Energy Installations
Solar panels and inverters are highly vulnerable to lightning-induced overvoltages. Rooftop solar setups, ground-mounted solar farms, and wind turbine structures all need dedicated lightning protection.Conventional vs ESE Lightning Arrester – Which One Should You Choose?
| Feature | Conventional (100 mm) | ESE (Early Streamer Emission) |
|---|---|---|
| Technology | Passive — no electronics | Active — ionizes air |
| Protection Radius | 45° cone angle (~2 m at ground) | Up to 107 m claimed |
| Cost | Budget-friendly (90% cheaper) | Premium pricing |
| Maintenance | Zero maintenance | Periodic electronic checks |
| Best For | Homes, small buildings | Large complexes, high-risk |
| Track Record | 270+ years proven | Modern, fewer decades |
How Does a Copper Lightning Arrester Work?
During a lightning strike, the system protects your building through a controlled path:
- Lightning Formation: Electrical charge builds up in storm clouds.
- Strike Point: The copper air terminal provides a preferred point for lightning to strike.
- Current Flow: High current (10–200 kA) travels through the copper conductor safely.
- Grounding: The current is discharged into the earth via a low-resistance earthing system.
- Protection: The building structure and electrical systems remain safe.
The entire process happens in milliseconds and follows basic electrical principles.
How to Install a Copper Lightning Arrester
- Install the air terminal at the highest point of the building
- Fix the base securely using anchor bolts
- Connect a copper down conductor to the grounding system
- Install a proper earthing system with low resistance
- Test the system as per IS/IEC 62305 standards
Professional installation is strongly recommended for safety and compliance.
Frequently Asked Questions
What is the difference between 100mm and 250mm copper coating thickness?
Both provide excellent electrical conductivity. The 100 mm (100-micron) version works great for standard environments and costs less. The 250 mm (250-micron) version has 2.5 times more copper, extending service life from 15–20 years to 25–30 years — ideal for coastal or industrial areas with harsh conditions. The 250 mm variant costs about 40–60% more but pays for itself in aggressive environments.
How many lightning arresters are needed for my building?
Each 100 mm arrester protects a 45° cone from its tip. For a flat roof at height H meters, the protection radius roughly equals H. A 6-meter-tall building needs 1 arrester for up to 28 sq m of roof area. A 10 m × 15 m building (150 sq m) typically needs 3–4 units. Professional site assessment is recommended for buildings taller than 10 m or with complex shapes.
Should I choose conventional or ESE lightning arrester for my home?
For residential buildings of 1–3 stories, a conventional 100 mm copper arrester is usually the best choice. It costs 90% less than ESE systems, requires zero maintenance, and uses proven technology. ESE systems make more sense for large commercial or industrial complexes over 2,000 sq m, where fewer units need to cover wider areas.
Will the arrester attract more lightning to my building?
No — this is a common misconception. Lightning strikes are determined by building height, geographic location, and soil conductivity. The arrester does not increase your building's chance of being struck. It simply provides a safe, low-resistance path so that when a strike occurs naturally, the current is conducted harmlessly into the ground instead of damaging your property.
What is the lifespan of a copper lightning arrester?
A well-installed 100 mm conventional copper lightning arrester lasts 15–20 years under normal conditions. In less corrosive environments, it can last even longer. The molecular copper bonding ensures the protective coating does not peel or degrade over time.
Does a lightning arrester need maintenance?
Conventional copper lightning arresters require virtually no maintenance. However, it is a good practice to inspect the system once a year — check for physical damage, loose connections, and test the earthing resistance to make sure it remains below 10 ohms.
Is a lightning arrester compulsory in India?
The National Building Code of India (NBC 2016) and IS/IEC 62305 recommend lightning protection for buildings in lightning-prone zones. While not universally mandated for all structures, it is required for specific building types including schools, hospitals, government buildings, and tall structures. Insurance companies may also require it.
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