Working close to our installations

Are you planning to carry out works in the vicinity of our facilities? Specific safety guidelines must be followed.

One of Elia's Contact Centres must be consulted before any work is carried out within 100 metres of high-voltage facilities. They can provide all of the relevant information needed to ensure that the work is performed safely. For work involving the construction of wind turbines, the relevant distance is 500 metres.

Not only is this a necessary step in ensuring the safety of workers and the environment, but it is also mandatory: any contractor wishing to carry out works close to pipelines that transport hazardous products or near to high-voltage lines or underground power cables is required to report these works to the relevant system operators in order to obtain maps of their facilities. Otherwise, in the event of an accident, a contractor can be held liable for any injury or damage and any ensuing power cuts. Consult the page Declaration of works in the vicinity of our facilities  for further information.


Legal height restrictions apply to buildings in the vicinity of a high-voltage line. The permitted height depends on the position of the cables, which can vary depending on the nature of the connection, environmental factors (wind and temperature) and the distance between the pylons. Before a project starts and before a building permit is granted, you must consult the Contact Centre for the relevant region to check that your project is compatible with our facilities. The Contact Centre will also send you the safety measures you must apply when carrying out the work.

Authorities, architects, notaries and research officers can also call on Elia's expertise. This is best done at the earliest possible stage of the project.

Working with tall equipment

Anyone working with cranes, elevators, excavators or other long objects (such as ladders) must consult one of our Contact Centres to find out what safety measures can and should be taken. The same applies to anyone working on a roof or scaffolding within 100 metres of an overhead line.

Always respect the safe distance and follow these rules:

  • Take account of the wind and of any movements that the line or the machinery might make.
  • Make sure that a person is present specifically to ensure that the required safe distance is always maintained whilst work is being performed.
  • Equipment must be delivered to a location that is a safe distance away from a high-voltage line.
  • It is absolutely essential that everyone on the worksite is informed of the risks involved and is thoroughly familiar with the safety rules.

Excavation work/storage

Anyone wishing to carry out excavation work must first make sure that there are no underground high-voltage cables in the ground where they are digging. Visit the page Environment & Safety > Declaration of works in the vicinity of our facilities  for further information about this requirement.

Excavation work in the vicinity of high-voltage pylons (less than 15 metres) can impact on the stability of the pylons. Other risk factors include waterlogging and storage activities. Play it safe and contact us.


When working with tall farming equipment (such as irrigation equipment and combine harvesters) under high-voltage lines, do not to come too close to the lines or pylons. Make sure to contact one of our Contact Centres before starting work.

Wind turbines

Elia should be consulted before any wind turbine is erected. Within a radius of 500 metres of facilities such as overhead lines, pylons and high-voltage substations, wind turbines can cause interference (vibrations on conductors, for example) or damage (falling hazards, ice throw, etc.). Special measures therefore apply.