Frequently asked questions
What is lightning protection?
A lightning protection system is designed to ensure the excess electrical energy from a lightning strike takes a less destructive path to the ground through your building. This means that instead of flowing through the building's electrical wiring and piping where it could cause significant damage, it travels down a safe path into the ground.
A correctly installed lightning conductor system should protect your building against lightning strikes and the destructive force of electrical energy. Any personnel or equipment that is within the building will be protected and costly damage avoided.
In the same way that fire alarms, sprinklers and security systems offer your building protection, a lightning protection system gives you peace of mind. Why wait until the worst happens when you can be prepared for every eventuality?
Do we offer lightning protection risk assessments?
Yes - as part of our lightning protection testing services, we can conduct a thorough lightning protection risk assessment. This means we assess the risk of a lightning strike on your property, considering all factors.
Once we have done this first part of the risk assessment, we can then recommend what kind of lightning protection you will need. This will depend on the size and nature of your property, as well as its intended use and associated risks. We will also carry out all the required testing after installation to ensure your system is in top working order.
If you would like more information about commercial lightning protection, BS 62305 regulations, or to arrange a lightning protection risk assessment, then get in touch with a member of our team. We have experienced engineers who have the correct equipment and access to test all aspects of your system.
If you have an existing system in place that is long overdue for a test, then don’t put it off. However unlikely it might seem, lightning is a real threat to buildings of a certain size. You can prevent potentially massive costs with a straightforward and affordable test. Get in touch with our team to book your commercial lightning protection assessment, and get the peace of mind you need for your building.
What does our lightning protection testing include?
At Spectrum, we can test each component of your commercial lightning protection system. We use our specialist access equipment to reach and test all sections of a system, no matter where they are located in your building.
In addition to our risk assessments described above, we can cover:
Lightning conductor testing
Crucial to the installation of any lightning protection system, lightning conductor testing should also be carried out on existing systems by skilled personnel. This should happen regularly, using calibrated test equipment. This will ensure the system complies with the relevant legislation and maintains its safety.
Earthing system testing
Testing the earthing system of a lightning protection system is important to ensure it is functioning effectively and safely. Each conductor has its electrode termination, and the resistance to earth of the whole system must not exceed 10 ohms. Our experienced engineers will measure all readings and ensure they fall within the safe limit.
Soil resistivity testing
To achieve an effective lightning protection system, soil resistivity is a crucial factor. So, when considering any electrical grounding design, you need to take this into account. Soil resistivity describes the degree to which the soil will resist the flow of electricity. When designing systems reliant on the current passing through the surface of the earth, this should be considered. Our team of engineers can ensure your soil resistivity levels meet all of the required levels.
When does a building need lightning protection?
Commercial lightning protection is something that any business can benefit from. But just how does lightning and lightning protection work? Lightning is an electrostatic discharge that can occur in the air or from the air to the ground. When a lightning strike makes contact with a building, the surge of electricity damages fuses and potentially any electronic devices connected to the system.
A commercial lightning protection system safely transfers the electrical energy from a lightning strike away from the building and into the ground. Here it can be safely discharged. Therefore, the purpose of a commercial lightning protection system is not to prevent the lightning from striking – in reality, nothing can do this. The real aim is to provide a path of low resistance for the lightning to pass around or through the building. The major components of any commercial lightning protection system include lightning rods, conductor cables and grounding rods, configured in a way to ensure easy passage of energy.
Why is lightning protection testing important?
Installing lightning protection systems that comply with industry recognised safety standards is a key part of commercial lightning protection. The standards for the earthing system are set by law and require certain design limits to be met to guarantee your property is safe. To make sure your system fully meets these standards, regular testing by an accredited body is required. The Electricity at Work Regulations, 1989, state that lightning conductor systems need to be tested per the relevant British Standard.
What is the British standard for lightning protection?
The British standard for lightning protection is defined by BS EN 62305. This set of standards provides comprehensive guidelines for the protection of structures against lightning. It covers risk management, physical damage to structures and life hazard, electronic systems protection within structures, and service to the public.
BS EN 62305 emphasizes the need for a detailed risk assessment to tailor the lightning protection measures to the specific needs of a structure, considering its environment, contents, and the human lives it shelters.
The standard is divided into several parts, each focusing on different aspects of lightning protection, from the general principles to the design, installation, and maintenance of lightning protection systems. Some important sections include:
BS EN 62305-2
BS EN 62305-2 aims to provide a procedure to evaluate the risk of lightning flashes on a structure. A lightning conductor risk assessment on UK properties should occur once every twelve months.
BS EN 62305-3
British standard BS EN 62305-3 provides the requirements for protecting a structure against physical damage through a lightning protection system. It also provides the requirements for protection against the risk of injury due to touch and step voltages in the vicinity of a lightning protection system.
BS EN 62305-4
BS EN 62305-4 provides information for the design, installation, inspection and maintenance of lightning electromagnetic impulse (LEMP) protection measures. These measures protect electrical and electronic systems within structures and can reduce the risk of permanent failures due to LEMP.
All of the tests carried out by Spectrum are compliant with the British Standards, meaning you can be sure that your building, its contents and anyone within it are protected to the best possible standards.