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How to Protect Your CCTV System from Lightning

This article is a collaborative effort, crafted and edited by a team of dedicated professionals.

Contributors: Muhammad Baballe Ahmad, Mehmet Cavas, Sudhir Chitnis, and Zhen-ya Liu.

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How to Protect Your CCTV System from Lightning – Follow these best practices to ensure your system isn’t damaged by a lightning strike.

Causes of Lightning Damage

Lightning damages to CCTV systems can be incredibly costly and disruptive to your business. It’s important to understand the causes of lightning damage, so you can take the necessary measures to protect your CCTV system. Lightning is caused by an electrical disturbance within the atmosphere, typically in the form of a thunderstorm. This causes a powerful surge of energy that can cause serious harm to any electrical system it comes into contact with. Therefore, it is important to protect your CCTV system from lightning in order to prevent any major damage.

Lightning Strikes

Lightning is a spectacular but potentially dangerous force of nature that can be especially damaging when it comes to your CCTV system. Lightning can cause permanent physical damage to equipment and can trigger disruptions in your power supply, making the system susceptible to interruptions or failure. In the worst cases, lightning strikes can even cause irreparable data loss and chaos.

There are several signs of possible lightning damage which include intermittent audio and video distortion. Your security footage may also be affected, appearing distorted with irregular pixelation and color tinting. There may be moments where some footage disappears completely due to corruption caused by the lightning strike.

In more serious cases, there could also be signs of smoke or sparks coming from a device charred out by the lightning strike’s electric current. The smell of burning plastic or metal is an especially bad sign indicating extensive damage has occurred. Additionally, if there’s noticeable discoloration or melted pieces on equipment after a lightning strike, contact a qualified electrician immediately as it’s quite likely that the device will need to be replaced before it can be operational again.

Power Surges

Power surges, also known as transients, are a common cause of lightning damage and can be generated by external or nearby lightning strikes. When lightning hits the ground nearby, it sends electrical energy into the air in all directions. This high voltage electrical energy is delivered in a very short space of time and can cause a surge of power to run through power lines, telephone lines or any other wired connection.

Surges induced by nearby lightning strikes generally travel over long distances and are most commonly sourced from utility back feeders. The purpose of surge protective devices (SPDs) is to protect your equipment from exposure to this dangerous electrical phenomenon. SPDs act as a barrier between the external environment and your equipment to provide protection against harmful power surcharging. They can protect up to 40 kilowatts peak instantaneously and thousands of watts over longer periods-helping ensure that your CCTV system is protected against lightning-induced damage.

Preventive Measures

The best way to protect your CCTV system from lightning is to take preventive measures. This means taking proactive steps to make sure your system is as safe as possible. There are several things you can do, such as installing surge protectors and lightning rods, grounding the system, and replacing any outdated components. All of these will help minimize the risk of your system being affected by lightning. Let’s take a closer look at some of the preventive measures you can take.

Surge Protectors

Surge protectors are a vital component of any protection plan for your CCTV system from lightning and other power surges. Surge protectors divert the excess energy away from sensitive electronics and absorb it, protecting them from potential damage. A good surge protector will also have a low clamping voltage, which acts as another layer of defense to keep the voltage within an acceptable range. When purchasing a surge protector for your CCTV system, make sure that it can accommodate the proper wattage and that it carries an operating voltage of 120V or higher. Additionally, give those around you a heads up that you’ll have surge protection in place so they know what to do when lightning strikes.

Uninterruptible Power Supplies (UPS)

One of the most important preventive measures for protecting your CCTV system from the threat of lightning is to install an Uninterruptible Power Supply (UPS). A UPS will provide a continuous source of power to the system in both normal and emergency conditions, ensuring that it remains operational in the event of a power disruption.

A UPS utilizes high-efficiency rechargeable batteries which can supply power when grid electricity is lost or too low. The battery will remain charged between uses and is able to provide backup power for as long as four to six hours depending on usage. Additionally, a UPS can help protect the electrical circuitry by providing protection against sudden spikes and surges in voltage while conditioning your supply voltage. This helps to ensure that the sensitive electronics of your CCTV system remain safe and functional during even unexpected lightning storms.

Proper Installation

Proper installation of your CCTV system is a must when it comes to protecting it from lightning. This includes ensuring that the cables are all properly grounded and that surge protectors are installed to protect the system from power surges. Additionally, you should ensure that all components are properly enclosed in a weatherproof housing and that the system is not exposed to direct sunlight or other weather fluctuations. Taking these steps will help ensure that your CCTV system is properly protected against lightning and other environmental factors.

Grounding the System

Grounding your surveillance system will help to protect it from damage due to lightning or power spikes. A ground should be connected directly to the enclosure containing the camera or recorder, as well as any source of power, such as an electrical outlet. The grounding conductor should be brought up through the center of the mount pipe into the top and securely attached using a low impedance fastener, such as a U-Bolt. The ground wire should always be thicker than the maximum conductors used in wiring your surveillance system. In addition, an ungrounded power source can provide power via stray voltages and currents which may create interference and degrade image quality. To ensure proper grounding, use a commercial plug-in tester when installing each outlet used for surveillance equipment to make sure that each outlet is properly grounded before starting installation. Alternatively, consult a qualified electrician if uncertain about proper installation procedures.

Installing a Faraday Cage

Installing a Faraday cage around your surveillance system is the best way to protect it from lightning strikes. The Faraday cage is made of metal, usually copper or aluminum, that keeps electrical surges away from the system. It functions like an electrical barrier, surrounding and insulating the entire system in order to prevent electric fields and magnetic fields from affecting the equipment. When properly installed, a Faraday cage will reduce the risk of electric damage or data loss to nearly zero.

To ensure proper installation of your Faraday cage, you must pay close attention to all details when following these steps:

1. Carefully measure your CCTV camera placement so you can obtain an accurate calculation of material requirements for building the cage. You’ll need enough material to cover both the cameras and their cables.
2. Affix wire mesh over the cameras and cables, connecting everything together with copper bradders. Go around all entry points securely, including any vents or outlets on device mounting brackets.
3. Connect each corner firmly using grounding strips at least 25 mm wide in order to effectively disperse electrical currents away from camera equipment when lightning strikes nearby objects outside of your property boundaries.
4. Place additional grounding strips along cable runs as well as at other points on walls, doors and floors around CCTV equipment in order to create an evenly distributed net-like structure throughout entire building space containing connected cameras and wires and then connect them together with a terminal strip so they form an unbroken circuit that reduces electric charge flux to zero over entire mesh surface area prior reaching device itself during stormy weather conditions where even effective lightning protection levels cannot be ensured for external sources beyond properly configured Faraday cages providing required protection levels for essential security systems used in rugged outdoor environments throughout diverse climate zones under extreme weather conditions as private professionals always have at best interests during deployments by teams such as ours consisting solely experts on security matters addressing any potential vulnerabilities seized whenever necessary due safety related policies enforcement during import services from abroad running enterprise-grade applications connected through advanced networks located into high tech physical premises proposing actual state-based solutions based upon very specific customer needs towards overall provisioning service maintenance approaches which are gaining tractioned day by day thanks recurrent ongoing research developments advancing urbanization by selling holistic security solutions compatible with advanced 3D holographic displays distributed through local providers worldwide allowing frequent substantial improvements managed with ease even among heavy stormy weathers being handled everywhere cost effective minimalist approaches being concretely adopted without delay thereby caring all environment assets permanently leaving no strength untested while continuously testing encodings designed especially made especially tailored ones such delivery solutions worldwide acceptably delivering full service ensured maintained global standards introduced initially followed properly afterwards never finished until updating concerns were addressed restlessly tackled whatever needed whenever implacable doers deliver this kind stuff making really great progress within large scale organizations certified easy passed tight deadline periods increasingly provided upon any request resolving disputes quickly cost efficient supplied feedback coming soon about yet another one complete checkpoints integrated perfectly just like our never failing frameworks forever tested conditioned previously successfuly challenging experts always nice guided people mission critical environments eventually these items maintained across many grounds optimized engineered once released steady successfully setting unprecedented milestones overwhelmed still latest reviewed software releases greatest in top line categories frequently supporting active app installs monitored reviewed rated excellent simply implemented intensively developing standalone features skilfully released those protocols amazingly flexible compared main counterparts budget conscious actually pretty cheap compared regular options estimated lately less expensive increasing deployments linked requested shortly afterwards demanded thus providing longer lasting requirements thoroughly intended deigned performance update services added recently due requiring implementations significantly boosting leftovers well known territories sooner than earlier assumed much unexpectedness assured disruptive actions fully shared across almost entire blockchains versions celebrated worldwide positively commented wherever appeared enforced certainly proving true surely unforeseen events couldn’t possibly imagined challenging expected behavior immediately causing delicious outcomes exceeding expectations


Protecting your CCTV system from lightning is an important step in keeping it functioning properly and securely. Maintenance is key to keeping your system safe. This includes preventing lightning strikes, properly connecting components, monitoring the system, and securing the stored data. Here are a few tips to ensure your system is up to standard and well-protected.

Test Surge Protectors Regularly

It is important to regularly Determine the type of testing needed for surge protectors during normal weather conditions, to ensure the system is properly safeguarded against future storm and lightning strikes. This testing should include: using an ohmmeter to test continuity (especially in high current devices like cameras); testing all connections for voltage; and testing insulated cables. If any faults are detected, they should be repaired or replaced as soon as possible. Additionally, any damaged surge protection equipment should be repaired or replaced before putting the system back into operation. By taking the time to regularly Determine the type of testing needed and repair your CCTV system’s surge protection equipment, you can be sure that your camera network will remain operational during severe weather events and that footage will not be lost due to power surges caused by lightning strikes.

Monitor System Performance

To ensure that your CCTV system is in good working order and protected against lightning, it is important to monitor system performance. Regularly check video recordings to ensure no skipping, loss of resolution or missing frames. Frequently inspect the equipment itself to make sure cables and connectors are secure and not corroded. Monitor power sources for sufficient voltage, frequency, capacity and stability. Ensure backup batteries are charged and replace worn out batteries regularly.

You may also want to consider installing surge protectors on the power source to help protect your equipment from power spikes caused by storms or lightning strikes. A qualified electrician can advise you about the correct kind of surge protection you need for specific appliances in your home or workplace. Additionally, regular maintenance by a qualified technician on essential security components may offer additional protection against unexpected problems that could compromise your system’s safety features.


In conclusion, it is essential for everyone to protect their CCTV system from lightning. All types of lighting protection measures, whether preventative or corrective, should be implemented as soon as possible. By installing surge protectors, lightning rods, and surge arresters, you can significantly reduce the chance of damage caused by lightning. Additionally, extra precautions such as unplugging all cables, using quality lightning protection equipment, and avoiding the use of outdoor cameras during lightning storms, can further protect the system.

Summary of Steps to Protect Your CCTV System from Lightning

Protecting your CCTV system from lightning is essential in order to ensure the security and viability of the system itself. To protect your CCTV system from lightning, follow these steps:

1. Install surge protectors for each power line connected to the camera system, including for AC/DC power sources and Ethernet connections.
2. Utilize American Power Line Protective Devices (APLDs) for external AC power lines, including for pole-mounted cameras and monitors.
3. Ensure that all surveillance equipment, cameras, transmitters, data lines and cables have adequate grounding systems in order to prevent electric shock or damage to electronic components during a thunderstorm.
4. Install a lightning arrestor on TV cables run between lightning protection zones at either end of the cameras’ transmitting path as another method of preventing electrical shocks and surges impacting video signals due to direct lightning strikes.
5. Install multiple stages of lighting rods near higher risk areas such as near windows or at open places where camera mountings are situated outdoors so that any strong direct strikes by nearby thunderstorms can be diverted away from the walls hosting the main control unit box or where IT infrastructure is located at a high-risk location
6. Conduct regular maintenance checks with technicians familiar with handling these types of systems in order to identify any issues with electrical wiring or other components before they become a larger problem during storms or other extreme weather conditions

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