Why Can Lightning Affect CCTV Systems?

Lightning does not always need to strike a camera directly to create a problem.

A nearby lightning event can produce electrical transients that may affect connected systems. CCTV installations often include:

• Cameras installed across different parts of a property
• Power connections
• Network or communication connections
• Recording equipment
• Network switches and other connected devices
• Long cable runs between equipment

This means a CCTV system needs to be considered as part of the building’s overall electrical protection strategy.

For facilities where CCTV is important for security and monitoring, protecting the connected electrical and electronic infrastructure becomes an important consideration.

How Can a Surge Reach a CCTV System?

A CCTV installation can have multiple connected pathways.

The exact protection requirement depends on the installation and system configuration. This is why simply selecting a surge protection device without considering the complete installation may not provide the intended level of protection.

What Does Surge Protection Do for CCTV Equipment?

A Surge Protective Device (SPD) is designed to limit transient overvoltage and divert surge current as part of an electrical protection system.

For CCTV applications, the protection strategy should consider:

• The type of equipment being protected
• How the equipment is powered
• Connected communication pathways
• The installation environment
• The earthing arrangement
• The location of the protection device

LES Ecotonik Systems provides Surge Protective Devices as part of its electrical protection portfolio. Its product range includes SPDs designed for different electrical applications and system configurations.

Why Is Earthing Important Alongside Surge Protection?

Surge protection should not be treated as an isolated product.

An SPD works as part of a wider protection arrangement involving the electrical system and earthing. LES also provides earthing and grounding solutions alongside surge protection, external lightning protection and bonding systems.

For a CCTV installation, the protection strategy should therefore consider both:

Surge protection + appropriate earthing and grounding

This system-level approach is particularly relevant for larger commercial, industrial and infrastructure installations where CCTV equipment is distributed across the site.

CCTV Lightning Protection: What Should You Consider?

Before selecting protection for a CCTV installation, project teams should understand the complete system.

1. Identify the Connected Equipment

Determine which CCTV components require protection, including cameras and associated equipment.

2. Understand the Connection Paths

Identify how power and communication connections reach the CCTV equipment.

3. Consider Cable Routes

Long cable routes and connections between different parts of a facility should be considered during protection planning.

4. Review the Earthing Arrangement

The earthing and grounding system forms an important part of the overall electrical protection arrangement.

5. Select the Appropriate SPD

The SPD should be selected according to the electrical installation, equipment and application rather than using a generic device for every situation.

6. Consider the Complete Protection System

Where required, CCTV protection should be considered alongside the building’s external lightning protection, surge protection, earthing and bonding arrangements.

CCTV Protection vs External Lightning Protection

These two functions should not be confused.

A building can therefore require more than an external lightning protection system when it contains sensitive electronic equipment.

LES’s current technical content similarly presents lightning protection as a complete system involving external protection, surge protection, earthing, bonding and related components rather than one isolated device.

Where Should CCTV Surge Protection Be Considered?

The appropriate location depends on the system architecture and the pathways through which equipment is connected.

A typical planning approach is:

Lightning / transient event
↓
Electrical or connected pathway
↓
Surge protection
↓
Protected CCTV equipment

The actual protection arrangement should be determined from the project’s electrical design and equipment requirements.

When Should You Consider Professional Technical Support?

Professional input becomes particularly useful when CCTV is installed across:

• Industrial facilities
• Commercial buildings
• IT and technology environments
• Infrastructure projects
• Large campuses
• Sites with extensive outdoor camera networks

In these installations, CCTV may be connected across multiple electrical and communication pathways. A site-specific approach can help identify where surge protection and earthing should fit within the wider electrical protection system.

LES Ecotonik Systems provides surge protection, earthing and grounding, external lightning protection, control and instrumentation solutions, along with technical support for electrical protection applications. The company states that it has been active in the field since 2005 and is an ISO 9001, ISO 14001 and ISO 45001 certified organisation.

7 Causes of Increased Earthing Resistance During Summer

1. Loss of Soil Moisture

Dry weather reduces the moisture content around the earth electrode. Since moisture contributes to the electrical conductivity of soil, prolonged drying can increase soil resistivity and result in a higher measured earthing resistance.

This is particularly relevant in areas where summer temperatures are high and rainfall is limited.

2. Increased Soil Resistivity

Soil resistivity varies according to factors such as moisture, temperature, soil composition and mineral content. When summer conditions cause the soil to become significantly drier, its resistivity can increase.

Therefore, an increase in measured resistance does not automatically mean that the electrode has failed.

3. Poor Electrode-to-Soil Contact

An earth electrode needs effective contact with the surrounding soil. Drying, settlement or changes in the surrounding soil can affect this contact.

If the electrode is not adequately installed or the surrounding material has deteriorated, seasonal changes may make the problem more noticeable.

4. Corrosion of Earth Electrodes

Metallic electrodes and conductors can deteriorate over time, particularly when exposed to aggressive soil conditions.

Corrosion can reduce the effective condition of the electrode and its connections. If resistance continues to increase across different seasons, the electrode and associated connections should be inspected rather than assuming that summer dryness is the only cause.

5. Loose or Deteriorated Connections

A properly installed earthing electrode can still show problems if connections between the electrode, earthing conductor and bonding points become loose or deteriorated.

Common areas to inspect include:

• Earth conductor connections
• Clamps and terminals
• Jointing points
• Inspection chambers
• Connections to the main earthing network
• Corroded contact surfaces

6. Inadequate Earthing Electrode Arrangement

One electrode may not always provide the required performance for a particular electrical installation. Soil conditions, fault-current requirements and the overall system design need to be considered when determining the appropriate earthing arrangement.

If resistance remains high even after seasonal conditions improve, the earthing design itself may need technical evaluation.

7. Changes in Backfill or Surrounding Material

The material surrounding an electrode can influence its contact with the soil. Settlement, drying, deterioration or unsuitable installation practices may affect the electrical characteristics around the electrode.

For this reason, inspection should consider both the electrode and the surrounding installation rather than focusing only on the measured resistance value.

Summer Earthing Problems: What Should You Check?

How Can You Investigate a Rise in Earthing Resistance?

Start by comparing the current measurement with previous test results. Seasonal measurements can help determine whether the increase is temporary or part of a longer-term trend.

Next, inspect the accessible connections, electrode condition and earthing conductors. The soil conditions around the electrode should also be considered.

If the resistance remains higher than expected, a qualified electrical professional can evaluate the earthing arrangement, soil conditions and electrode configuration to determine the appropriate corrective action.

For installations requiring reliable grounding, proper electrode selection and installation are essential. LES Ecotonik Systems provides earthing and bonding solutions designed for different electrical and industrial applications.

Learn more about G.I. Pipe Electrode earthing solutions .

You can also explore Surge Protective Devices for additional protection against electrical surge-related risks.

Key Points to Remember

• Summer dryness can increase soil resistivity and affect earthing resistance.
• Higher resistance does not necessarily mean the earth electrode has failed.
• Moisture, soil type, electrode condition and connections can all influence measurements.
• Corrosion should be considered when resistance increases over a longer period.
• Loose or deteriorated connections can affect the effectiveness of an earthing system.
• Seasonal measurements are useful for identifying performance trends.
• Persistent high resistance requires inspection of the complete earthing system, not just the electrode.

Why Lightning Protection Matters During the Rainy Season

Rain itself does not create a universal level of lightning risk for every property. However, thunderstorms accompanied by lightning create hazardous conditions, prompting the Indian Meteorological Department (IMD) to issue regular public safety advisories. The IMD advises people to remain indoors during lightning activity, avoid open areas, and, when safe to do so, unplug electrical and electronic appliances.

For property owners, seasonal preparation must go beyond simply switching off appliances during a storm. A building’s protection must be considered as a complete, interconnected system.

The basic protection chain is:

Lightning Risk → External Lightning Protection → Down Conductors → Earthing and Bonding → Surge Protection → Electrical & Electronic Equipment

The goal is not to “stop” lightning—no system can prevent lightning from occurring. The purpose of rainy season lightning protection is to reduce risk by providing appropriately designed protection measures and controlled paths for lightning-related currents and surges. IEC 62305 identifies risk management as the foundational basis for selecting adequate protection measures.

Can Lightning Damage Homes & Buildings Without a Direct Strike?

Yes.

A lightning flash can severely affect a structure or connected lines even when the building itself is not the direct strike point. Lightning-related electrical effects can enter through or affect connected power and communication systems, often resulting in massive damage to electrical and electronic installations. IEC 62305 specifically addresses protection against these lightning effects on electrical and electronic systems within structures.

This is why simply installing an external lightning rod is not automatically the same as protecting every electronic device inside a building.

A complete protection strategy may need to consider:

• External lightning protection
• Earthing
• Bonding
• Electrical surge protection
• Data and communication pathways
• Sensitive electronic equipment
• Solar PV systems
• Building-specific electrical architecture

What Can Lightning and Surge Events Damage?

Modern residential and commercial buildings contain more connected electronics than ever before.

Potentially affected equipment can include:

The actual protection requirements always depend on the property’s specific electrical design, connected systems, and formal risk assessment.

How Lightning Can Affect Residential & Commercial Buildings

There are several ways lightning-related energy can breach a property.

Direct or Nearby Lightning Effects

Lightning can interact directly with:

• Building structures
• Rooftop equipment
• External conductors
• Power infrastructure
• Communication lines

Electrical Surges

Transient overvoltages can travel rapidly through electrical systems and reach connected equipment. An SPD (Surge Protective Device) is designed to limit surge voltage and divert surge current rather than allowing the transient to reach protected equipment at its full severity. IEC 61643-11:2025 covers low-voltage AC surge protective devices designed to protect against direct and indirect lightning effects and other transient overvoltages.

Induced Effects

Lightning electromagnetic effects can also cause unwanted voltages in electrical and electronic systems without a direct physical connection. IEC 62305-4:2024 specifically covers surge-protection measures for electrical and electronic systems within structures to reduce permanent failures caused by the lightning electromagnetic impulse (LEMP).

What Does a Complete Lightning Protection System Include?

A reliable strategy is usually broader than a single product. It requires four integrated components.

1. External Lightning Protection

External lightning protection is intended to manage the physical effects of lightning on the structure through appropriately designed:

• Air-termination components
• Down conductors
• Earth-termination arrangements
• Connections and bonding

The detailed design depends on the structure, protection requirements, and applicable standards. IEC 62305-3:2024 covers protection against physical damage and life hazards and provides requirements for the design, installation, inspection, and maintenance of lightning protection systems.

2. Earthing & Grounding

Earthing is a critical part of a coordinated lightning and surge protection system. A properly designed earthing system provides an appropriate path for current and supports the operation of surge-protection measures.

For residential and commercial buildings, the required grounding arrangement can vary according to the electrical installation, site conditions, and specific project requirements.

Important Note: A simple statement such as “lower earth resistance always means complete lightning protection” is inaccurate and insufficient. The complete system must be considered, including conductors, connections, bonding, electrode arrangement, and installation quality.

3. Bonding

Bonding helps manage potential differences between conductive parts to prevent dangerous sparking. Depending on the installation, bonding considerations can include structural metalwork, electrical equipment, metallic services, and lightning protection components.

4. Surge Protection Devices (SPDs)

External lightning protection and surge protection for buildings serve related but distinct purposes. An SPD is installed as part of the electrical protection system to limit transient overvoltages and divert surge current away from sensitive equipment. IEC 61643-11:2025 specifies requirements, tests, and ratings for low-voltage AC SPDs.

Lightning Protection vs. Surge Protection

One of the most common misunderstandings is treating lightning protection and surge protection as the exact same thing.

IEC 62305 separates physical-damage/life-hazard protection from measures intended to reduce failures of electrical and electronic systems. The two approaches must work together as part of a coordinated protection strategy.

Lightning Protection for Different Property Types

Lightning protection should not be treated as a solution solely for factories or high-rise buildings.

Individual Homes & Villas

Modern homes contain increasingly sensitive electronic systems, including smart TVs, routers, home automation, and solar inverters. Lightning protection for homes depends on the home’s structure, electrical installation, and assessed risk.

Apartments & Residential Buildings

Larger residential lightning protection systems must account for multiple electrical distribution points, rooftop equipment (like elevators and water pumps), common services, fire systems, and shared electrical infrastructure. Protection must be coordinated across the building.

Offices & Commercial Buildings

Commercial building lightning protection must safeguard IT equipment, servers, CCTV, access control, and HVAC controls. The high cost of equipment downtime makes surge protection a mandatory part of the overall electrical protection strategy.

Industrial & Infrastructure Buildings

Industrial sites involve automation, PLCs, control systems, and large electrical installations. The protection strategy here needs rigorous coordination between lightning protection, earthing, bonding, and surge protection.

7 Things to Check Before the Rainy Season

A seasonal inspection can help identify obvious issues before severe weather arrives.

1. Check the Existing Lightning Protection System: Look for visible damage, loose connections, corrosion, damaged conductors, or missing components.
2. Review the Earthing System: Check whether earthing records are available, earth connections remain intact, and if recent construction work has disturbed buried conductors.
3. Inspect Surge Protection Devices: Check SPD status indicators (often turning from green to red if failed), physical damage, and installation condition.
4. Review New Electrical Equipment: If the building recently added solar panels, CCTV, servers, or new electrical panels, the lightning and surge protection strategy must be reviewed.
5. Check Rooftop Changes: New solar panels, water tanks, HVAC units, or communication antennas can drastically change the protection requirements or physical arrangement of a building.
6. Keep Inspection Records: Maintain installation drawings, test reports, equipment details, and maintenance records.
7. Schedule a Professional Inspection: Completed lightning protection installations should be professionally inspected and tested, including the condition of conductors, bonds, joints, and earth electrodes.

What Should You Do During an Active Thunderstorm?

Installed protection and personal storm safety are not the same thing. During active lightning conditions, always follow official weather-safety instructions.

The Indian Meteorological Department advises people to:

• Stay indoors and avoid open areas.
• Avoid taking shelter under trees.
• Stay away from objects that conduct electricity.
• Follow local weather alerts.
• Unplug electrical and electronic appliances when it is safe to do so.

Do not treat a lightning protection system as permission to remain outdoors during a thunderstorm.

When Should Residential & Commercial Buildings Get a Lightning Protection Assessment?

A professional assessment is highly recommended when:

• Constructing a new building.
• Installing rooftop solar.
• Adding major electrical equipment or upgrading a commercial building.
• Installing communication equipment.
• Experiencing repeated electrical surge failures.
• Modifying an existing lightning protection system.
• Existing protection documentation is unavailable.

A risk-based assessment is always preferable to selecting products first and determining the design afterward. IEC 62305-2 provides the risk-management framework used to evaluate lightning-related risk and select appropriate protection measures.

How Professionals Provide Lightning Protection Installation

A professional lightning protection installation should follow a structured process rather than simply bolting a lightning arrester to the roof.

1. Site Assessment: Review building characteristics, location, roof configuration, existing electrical systems, and connected equipment.
2. Protection Assessment: Identify lightning exposure, structural considerations, electrical risks, and existing protection gaps.
3. System Design: Develop the appropriate combination of external lightning protection, earthing, bonding, and surge protection.
4. Product Selection: Select components according to the project design and applicable standards.
5. Installation: Install the protection system strictly according to the approved design.
6. Inspection & Testing: Inspect conductors, bonds, joints, earth electrodes, SPDs, and overall system condition.
7. Maintenance: A lightning protection system should be inspected periodically and reviewed after any significant building or electrical-system changes.

Common Lightning Protection Mistakes

• Installing a System Without Assessing the Property: A generic product cannot account for every building configuration.
• Assuming an External Lightning System Protects Every Device: Electrical and electronic systems usually require additional surge-protection measures to protect electronics from lightning.
• Ignoring Earthing and Bonding: The external protection system must be coordinated with an appropriate earthing and bonding arrangement to function safely.
• Selecting an SPD by One Number: SPD selection should consider the actual electrical system and applicable requirements rather than one headline rating alone.
• Forgetting About New Building Equipment: Adding solar, CCTV, or communication equipment changes the protection requirements.
• Never Inspecting the System: Lightning protection is an installed safety system that requires routine inspection and maintenance.

Pre-Monsoon Building Lightning Protection Checklist

Use this as a practical checklist for your facility management or maintenance team:

• External lightning protection inspected for physical damage.
• Air-termination components securely fastened.
• Down conductors checked for continuity.
• Connections and bonds inspected for corrosion.
• Earthing system reviewed and tested.
• SPD status indicators checked on electrical panels.
• Rooftop modifications (Solar, HVAC) assessed for protection coverage.
• CCTV/data/communication systems considered for surge protection.
• Previous inspection records located and reviewed.
• Professional inspection scheduled for comprehensive testing.

What Does a Complete Lightning Protection System Involve?

Lightning protection works as a system rather than as one isolated component. LES Ecotonik Systems provides solutions covering external lightning protection, surge protection, earthing and grounding systems, and bonding. The company also provides installation, testing, inspection and maintenance support for lightning protection systems.

This means checking only one component may not give a complete picture of the installation. The main areas that need attention include:

A proper inspection brings these areas together instead of looking at the lightning arrester alone.

1. Check the Condition of the Conductors

The conductors form an important part of the lightning protection installation. During inspection, LES states that the mechanical condition of conductors should be checked and observations should be recorded.

This is important because simply having conductors installed does not tell you their current condition. A completed installation should therefore be inspected rather than assumed to remain unchanged indefinitely.

For an existing system, inspection can help identify whether maintenance is required and whether the installation continues to match the intended specification.

2. Inspect Bonds and Joints

The condition of bonds and joints is another part of the inspection process identified by LES. Connections within a lightning protection and earthing installation need to be checked as part of the overall system assessment.

LES specifically includes bonds and joints among the components that should be examined during completed-installation inspections.

This is why a visual check of only the lightning arrester is not enough. The complete installation should be considered.

3. Do Not Ignore the Earth Electrodes

The earth termination side is another important part of the system. LES states that the mechanical condition of earth electrodes should be checked during inspection.

Periodic inspections and tests help indicate what maintenance, if any, is needed. The earthing system also has a specific role within coordinated lightning and surge protection.

According to LES, the earthing system is responsible for safely dissipating lightning currents to the ground and plays an important role in the efficient operation of surge protection devices.

For this reason, lightning protection and earthing should not be considered completely separate activities.

You can explore the Earthing and Grounding Systems service page for more information about its earthing solutions.

4. Lightning Protection and Surge Protection Are Not the Same Thing

Another important point is the difference between external lightning protection and surge protection.

LES describes a Surge Protection Device (SPD) as a component of the electrical installation protection system. The device is connected in parallel to the circuit of the loads it protects.

When transient overvoltage occurs, the impedance of the SPD decreases so that surge current is driven through the SPD, bypassing the sensitive equipment.

This means a building’s protection strategy can involve different protection functions. External lightning protection addresses the lightning protection system, while surge protection is part of protecting electrical installations from sudden spikes and surges.

LES provides a complete range of power surge protection devices through its Surge Protective Devices offering.

5. Earthing Needs the Right Design and Installation

Earthing is not simply about putting an electrode into the ground. LES states that both HV and LV earth systems should be correctly designed and installed by qualified and experienced earthing specialists.

The company also provides support for designing, installing and maintaining earthing systems. This becomes particularly relevant when evaluating an existing lightning protection installation.

If the lightning protection system is being reviewed, the earthing arrangement should also be considered as part of the overall protection system.

For more information, visit the LES Earthing and Grounding Systems service page .

6. Installation Inspection Should Not Be Skipped

One of the clearest points on the LES website is that completed lightning protection installations should undergo testing and inspection.

LES’s engineering team undertakes detailed testing and inspection to verify that completed installations are in accordance with the correct specification and applicable requirements.

The inspection includes checking conductors, bonds, joints and earth electrodes, with observations recorded. This gives building owners and project teams a practical reason to review the condition of an existing installation instead of simply assuming that an older system is still functioning as intended.

7. Maintenance Is Part of the Protection System

Lightning protection should not be treated as a completely one-time activity. LES states that periodic inspections and tests indicate what maintenance, if any, is needed.

The company also highlights its commitment to helping customers keep lightning protection systems installed and maintained to the required standard, with installation services and continuous maintenance support.

That makes inspection and maintenance an important part of the overall protection process. A system that has been installed should also be assessed over time.

When Should an Existing Lightning Protection System Be Reviewed?

A review is especially useful when a project team needs to verify the current condition of an existing installation. The inspection should consider:

• The mechanical condition of conductors
• The condition of bonds
• The condition of joints
• The condition of earth electrodes
• The earthing and grounding arrangement
• The surge protection arrangement
• Whether maintenance is required
• Whether the completed installation matches the required specification

LES provides site assessment, installation guidance, testing, inspection and maintenance support as part of its lightning and electrical protection services.

Lightning Protection System Inspection: A Simple Checklist

Before considering an existing installation complete, review these areas:

• Conductors checked
• Bonds checked
• Joints checked
• Earth electrodes checked
• Earthing system reviewed
• Surge protection reviewed
• Installation specification verified
• Testing and inspection completed
• Maintenance requirements identified

This checklist should not replace a professional inspection. It can instead help project teams understand the main areas that need attention.

Why the Complete System Matters

A lightning protection system should be considered as a complete arrangement rather than as a single product. LES Ecotonik Systems works across lightning protection, surge protection, earthing and grounding, with services covering design, installation, testing, inspection and maintenance.

Its product and service portfolio includes:

• External Lightning Protection Devices
• Surge Protective Devices
• Earthing and Grounding Systems
• Exothermic Welding
• Control & Instrumentation
• Transformer CT/PT solutions

LES also states that its products include devices based on NF C 17-102 (2011), UNE 21186:2011 and CPRI-tested devices, where applicable. The organisation is ISO 9001, ISO 14001 and ISO 45001 certified.

What Makes a Structure a Lightning Target

Lightning takes the shortest, lowest-resistance path from the storm cloud to the ground.

A structure that stands taller than its surroundings, sits in an isolated or open area, or has exposed metal fittings on its roof effectively becomes that path.

This is why industrial sheds with large roof spans, telecom towers, and multi-building IT parks are frequently the ones reporting lightning-related damage; height and isolation are exactly the conditions lightning is drawn to.

What Happens When Lightning Strikes an Unprotected Building

The damage from an unprotected strike is rarely limited to the point of impact.

• Direct strike damage shows up as fire risk at the strike point, structural damage, and physical damage to roofing and rooftop equipment.
• Indirect damage is often the costlier surprise. A strike doesn’t need to hit your building directly to cause harm; the surge it generates can travel through power and data lines and damage electronics, control systems, and networking equipment inside the building.
• Human safety risk is the part that’s easiest to overlook. Without a properly designed and earthed protection system in place, people and equipment near the structure remain exposed during a strike event.

How a Lightning Protection System Works

A properly designed lightning protection system is built to intercept a strike and guide it safely to the ground rather than letting it find an unpredictable path through your building or its wiring.

LES Ecotonik Systems has been active in this field since 2005, offering a range of external lightning protection devices designed around recognised standards including NF C 17-102 (2011 edition) and UNE 21186:2011, with products tested by CPRI (Government of India).

The range includes ESE (Early Streamer Emission) air terminals such as the SIRIUS, IONIA, UMBRAECO, and LYRA terminals, along with lightning strike recorders and flash counters (STORMFLASH 15, STORMFLASH 60, and the STRIKERX lightning strike counter) that let you track and verify how your system is performing over time.

Warning Signs Your Facility May Be Under-Protected

If you’re not sure where your building stands, these are worth checking:

• No visible air terminals on the highest points of your roofline or elevated rooftop equipment.
• No lightning strike recorder or flash counter installed; without one, you have no record of whether your system has actually intercepted a strike, or how many.
• Unexplained equipment failures during storms: repeated electronics issues that coincide with bad weather can point to surge exposure rather than routine equipment wear.
• No documentation on when the system was last inspected or serviced.

Why a Site Survey Matters

Every building is different; height, layout, roof construction, and surrounding structures all affect the level of risk and the right protection design.

That’s why LES Ecotonik’s approach starts with understanding your site rather than recommending a generic product.

With more than 30 years of combined experience in the lightning protection field, the team works through site assessment, product selection, installation, and ongoing technical support as one continuous process, not a one-time sale.

LES Ecotonik Systems is a “Make in India” organisation and an ISO 9001, ISO 14001 & ISO 45001 certified company, with a PAN-India presence supporting projects across Delhi, Noida, Gurgaon, Jaipur, Ahmedabad, Bhopal, Lucknow, Nagpur, Pune, Hyderabad, Bhubaneswar, Kolkata, Ernakulam, Bengaluru, Chennai, and Mumbai.