Working near high-voltage facilities

High voltage can kill. Always keep a safe distance, and always get in touch with Elia’s Contact Centre before you start work.

When to contact our Contact Centre

There are specific risks involved in working near a high-voltage facility. Our Contact Centre can advise you on the safety measures you should take.

In some cases, you are required to contact us before you begin work:

  • if you will be working within 100 metres of our facilities;
  • if you will be working near pipelines carrying hazardous substances;
  • if you will be working near HV power lines;
  • if you will be working near underground electricity cables;
  • before you begin a construction project or issue a building permit;
  • if you will be working with tall farming equipment (like tractors, irrigation equipment or combine harvesters) under high-voltage lines;
  • if you will be working with a crane, elevator, excavator or another long object (like a ladder);
  • if you are working on a roof or scaffolding within 100 metres of an overhead line;
  • if you are erecting a wind turbine.

Specific rules

Specific rules apply to some of the activities listed above. Our Contact Centre will tell you everything you need to know and answer all your questions. The specific rules relate to:

1 Construction


  • Legal height restrictions apply to buildings near high-voltage power lines. 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 two pylons.

2 Excavation work, elevation work and groundwater drainage

3 Wind turbines


  • You must ask Elia for an opinion before erecting a wind turbine. Wind turbines can have effects (such as vibrations) across a 500-metre radius. They can also pose a risk to HV power lines, pylons and HV substations – for instance, they may fall over or throw ice. Specific guidelines may apply depending on the location.

    See our procedure: opinion on wind turbines in the vicinity of HV facilities for more information


For detailed information about working near high-voltage power lines, read our brochure Staying safe near high-voltage facilities. 

Contact Centre

Contact Centre North
Vaartkaai 2
2170 Merksem
Contact Centre South

Rue Phocas Lejeune 23

5032 Les Isnes (Gembloux)


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