The provisions of this sub-section apply when work is carried out in the vicinity of electrical lines, pipes and installations:
1° Located outside premises and in the low-voltage A area (BTA), i.e. whose voltage exceeds 50 volts, without exceeding 500 volts in alternating current, or exceeds 120 volts, without exceeding 750 volts in smooth direct current;
2° Located outside or inside premises and in the low-voltage B area (BTB), i.e. whose voltage exceeds 500 volts, without exceeding 1,000 volts in alternating current, or exceeds 750 volts, without exceeding 1,500 volts in smooth direct current;
3° Located outside or inside premises and in the high voltage A (HTA) range, i.e. with a voltage exceeding 1,000 volts alternating current without exceeding 50,000 volts or exceeding 1,500 volts without exceeding 75,000 volts direct current;
4° Located outside or inside premises and in the high voltage B (HTB) range, i.e. with a voltage exceeding 50,000 volts alternating current or exceeding 75,000 volts direct current.