In the event of activity in the vicinity of overhead power lines, the excessive proximity of a construction machine can cause an electric arc (ignition).

Once the networks have been identified, it is therefore essential to ensure that safety distances are respected:

3 meters for lines or installations with voltage U < 50.000 volts; 5 meters for lines or installations whose voltage U > 50.000 volts (C. trav., art. R. 4534–108). When earthmoving, transport, lifting or handling equipment must be used or moved near a power line that cannot be de-energized, you must ensure the adaptation and installation of this equipment and work equipment in order to respect minimum safety distances during the execution of work. (C. trav., art. R. 4534–125).