For the application of the provisions of this chapter, operations on electrical installations are understood to mean :
1° In the high- and low-voltage fields, work away from voltage, work under voltage, switching operations, tests, measurements and checks ;
2° In the low voltage area, interventions.
Operations carried out in the vicinity of electrical installations are understood to mean electrical and non-electrical operations carried out in a defined area around live bare parts, the dimensions of which vary according to the voltage range. These dimensions are specified in an order issued by the ministers responsible for labour and agriculture.