Electricity
Power line protection zone: how many metres by voltage
Spain
RD 223/2008 gives a formula (≈ conductor swing + 3.2 + U/150, min 5 m); values rounded.
Distances and rules
The protection zone of an overhead power line is measured from the outer conductors on each side and grows with voltage. Inside it, building and many works need the grid operator’s consent.
Up to 1 kV
5 m on each side
Spain — RD 223/2008 (RLAT, ITC-LAT 07)
6–20 kV
5 m on each side
Spain — RD 223/2008 (RLAT, ITC-LAT 07)
35 kV
5 m on each side
Spain — RD 223/2008 (RLAT, ITC-LAT 07)
110 kV
7 m on each side
Spain — RD 223/2008 (RLAT, ITC-LAT 07)
150–220 kV
8 m on each side
Spain — RD 223/2008 (RLAT, ITC-LAT 07)
330–500 kV
10 m on each side
Spain — RD 223/2008 (RLAT, ITC-LAT 07)
Underground cable
1 m on each side
Spain — RD 223/2008 (RLAT, ITC-LAT 07)
Forbidden inside
Building, storage, planting/felling trees, open fire, earthworks and blasting — without the grid operator’s written consent.
Spain — RD 223/2008 (RLAT, ITC-LAT 07)
Allowed
Passage, driving across and mowing grass.
Local rules
Important limitation
This is a planning aid, not a legal opinion. Before construction, check the local land-use rules, easements, the network/utility operator’s requirements and neighbour buildings.
