Low-voltage electrical installations – Part 7-704: Requirements for special installations or locations – Construction and demolition site installations
|Publication Date:||25 September 2017|
|ICS Code (Electricity supply systems):||91.140.50|
The following requirements are added: 704.1.1 The special requirements of this part apply to temporary installations for construction and demolition sites during the period of the construction or demolition work, including for example the following: - construction work of new buildings; - repair, alteration, extension, demolition of existing buildings or parts of existing buildings; - engineering works; - earthworks; - work of similar nature. The requirements apply to fixed or moveable installations. The rules do not apply to - installations covered by the IEC 60621 series where equipment of a similar nature to that used in surface mining applications is involved; - installations in administrative locations of construction sites (offices, cloakrooms, meeting rooms, canteens, restaurants, dormitories, toilets, etc.) where the general rules of Parts 1 to 6 of HD 60364 apply. NOTE - For special situations, more severe requirements apply, e.g. HD 60364-7-706 for conductive locations with restricted movement. 704.1.2 The requirements of this part are applicable to - fixed installations limited to the assembly comprising the main controlgear and the main protective device; NOTE - The place where such an assembly is located is considered to be the interface between the supply system and the construction site installations. - installations on the load side of the above assembly comprising mobile or transportable electrical equipment as part of the movable installations.