Earthing of industrial buildings

Whether it is an existing building or a new construction: a functioning earthing system is the prerequisite for the safe operation of an electrical system in a building and for the protection of people against dangerously high voltages. 

Earthing and equipotential bonding in industrial plants  
The design of earthing systems for industrial buildings is a complex process that takes technical and safety-related aspects into account. To achieve the full protective effect, it is important to ensure that the earthing fulfils the requirements of the building and the installed electrical systems.  

With our solutions, you can play it safe – both in terms of compliance with standards and the function and durability of the components. We can also be at your side with our expertise when planning your earthing system. Find out more about our services and products that can be used to design and implement earthing systems in accordance with IEC 62305.  

Ring earth electrode protection concept with common equipotential bonding system

01
Follow these standards

Multi-purpose, office or industrial buildings are generally always planned with an external lightning protection system. The IEC 62305 standard must be taken into account here. 

02
Ring earth electrode preferred

A ring earth electrode is a suitable earthing system here. This is laid with a mesh size of 10 x 10 metres under the floor slab. In conjunction with a lightning protection system, the earthing system must always be designed with a combined equipotential bonding system (common bonding network, CBN for short). 

03
Adhere to mesh sizes

The maximum mesh size for the CBN should not exceed 20 x 20 metres. Smaller mesh sizes may also be required for special requirements due to the utilisation of the building. When constructing a building with high EMC requirements in accordance with IEC 62305-4, for example, a maximum mesh size of 5 x 5 metres is required. 

04
Connect CBN correctly

A CBN must be connected to the ring earth electrode at regular intervals of ≤ 20 m. This can only be dispensed with in combination with fibre-reinforced concrete. It is practically impossible to carry out a CBN in fibre-reinforced concrete.  

05
Connect external lightning protection

Connection lugs for the external lightning protection system must be provided at the maximum spacing of the down conductors based on the selected lightning protection class – we recommend at least every 10 metres.  

06
Internal down conductors

Internal down conductors should be planned for buildings with larger dimensions (four times the down conductor spacing). Routes that penetrate the building are then required for these connections. To prevent the ingress of water, pressure-water-tight wall bushings, fixed earthing points or sealing collars tested for connection lugs must be used. 

Earthing and equipotential bonding – all from a single source

Earthing conducts currents into the ground, for example in the event of lightning strikes, while equipotential bonding eliminates voltage differences between protective conductors and metallic parts of the building.   

  • We offer a wide range of cable materials such as round wire, steel strip and terminal lugs. Our clamps and connectors include connecting clamps, SV clamps and cross units with intermediate plates.  
  • We offer special rails, wall bushings, connection terminals and fixed earthing points for equipotential bonding.  

We are your full-service provider for earthing and equipotential bonding.  
Ask us for advice specific to your situation. 

 

Safely standard-compliant

Our solutions and products for earthing industrial buildings are standard-compliant in accordance with IEC 62305.

Our services

We can provide support for your project from the planning to the implementation and beyond. Take advantage of our wide range of practical tools and services. 

DEHNplan design software

Design the external lightning protection and earthing systems for your project in accordance with IEC 62305-3.  
The program automatically creates a bill of materials for further use. 
DEHN Engineering Services

We create the entire lightning protection concept – from the risk analysis and earthing simulation to budget planning – all precisely tailored to your project, and standards-compliant. 

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