Lightning Protection & Grounding Systems

Installing lightning rods and metal structures is essential for the safety of people and property, and for this reason, safety is a fundamental aspect of this process.

When it comes to copper grounding, it is necessary to take special care and additional measures to ensure the safety of all the people involved.

Copper grounding is used to connect the lightning rod to the earth and allow current to flow to the ground to prevent property damage and injury to people.

However, its use can present risks and potential hazards if is not properly installed and used under adequate conditions.

It is important to consider these risks and take special measures to minimize them and ensure safety at all times.

It is important to consider these risks and take special measures to minimize them and ensure safety at all times.

Modern standards: The non-use of the grounding cable in the presence of a metal structure or structural iron of concrete.

Modern standards are clear when it comes to safety at the moment of installing lightning rods and metal structures. In fact, these regulations state that it is extremely dangerous to use a grounding cable in the presence of a metal structure or structural iron of concrete, and therefore it should not be done under any circumstances.

Verifying the continuity to the ground is a fundamental step before installing any lightning rod system. This ensures that any electrical overload that may occur during a thunderstorm is dissipated through the earth and not through the metal structure.

In short, the non-use of the grounding cable in the presence of a metal structure or structural iron of concrete is an essential safety measure that must be taken into account in any lightning rod installation.

The safety of people and property is the most important thing and this standard is one way to ensure it.

Safe arrangement when installing lightning rods: The importance of choosing an adequate type of grounding cable.

When placing lightning rods, it is important to adopt a safe arrangement in the first section of the grounding. In the case of towers, the metal mast is used first, and then the tower body up to its floor, which will be attached to the structural iron of the reinforced concrete.

This arrangement is justified by the fact that lightning travels most of its energy through the inductive impedance of the conductor due to the large escarpment of its pulses.

The tower has a much lower impedance than copper grounding, which makes it much safer.

Hazards of grounding: The most dangerous point for people's lives in a lightning rod installation.

It is important to consider the dangers of grounding when installing lightning rods The grounding is the most dangerous point for people's lives in a lightning rod installation.

If someone is standing less than two meters away from the grounding at the time of a lightning strike, their life is at serious risk as they will receive a lateral discharge on their head that can be fatal.

The victim of this accident will not recover since the discharge destroys the respiratory center in the brain and then fibrillates the heart, making it impossible to recover.

Discharge explanation: The ground and the outgoing current produced by lightning.

The explanation for this discharge is that the floor is resistive to current up to 30 kHz. If we take into account that the average current of lightning at the peak of the first is 40-50 kA and we assume a ground of 1 W concerning the SEN, the outgoing current will produce 40 kV at this stage of its journey.

When it runs through the inductive impedance of the grounding cable, it raises an easily calculable voltage that is orthogonal to the previous one. A straight cable has an impedance of 0.6 μH/m so that, at 4 meters high, it will have L = 2.4 μH. If a pulse of 40Ka/μsec is applied to this impedance, you will obtain E = LDI/dt = 2.4 x 10-6H x 4 x 104/ 10-6sec = 96 kV that are added orthogonally to the resistive 40 kV.

This being said, it is demonstrated that copper grounding is useless, dangerous, and meaningless and does not work. Therefore, COPPER CABLE GROUNDING MUST NOT BE USED IN PARALLEL WITH A METAL STRUCTURE (especially if it stores flammable material) SINCE THEY HAVE DIFFERENT IMPEDANCES AND GENERATE POTENTIAL HAZARDOUS DIFFERENCES.

Conclusion

In conclusion, the type of grounding cable is a key aspect of the safety of people in a lightning rod installation. Modern standards state that copper cable should not be used in parallel with a metal structure since this can create hazardous differences between the structure and the grounding cable.

In addition, the copper grounding is dangerous for people. If a person is standing less than two meters away at the time of the lightning strike, the person may receive a side shock that could be fatal.

For this reason, it is recommended to adopt the arrangement of a metal mast in the first section and the body of the tower in the second section to the ground, which will act as a safer alternative to the copper grounding.
It is important to follow these safety measures to prevent accidents and protect people's lives.

Diego Subilibia


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