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Additional info for IEC 60364-5-52 Electrical installations of buildings - Selection and erection of electrical equipement
Example text
5). 52-13 sont applicables aux câbles sans armure et sont issues des méthodes données dans la CE1 60287, utilisant des dimensions spécifiées dans la CE1 60502 et des résistances de conducteurs données dans la CE1 60228. Les variations pratiques connues dans la construction des câbles (par exemple la forme des conducteurs) et les tolérances de fabrication conduisent à une gamme de dimensions possibles pour chaque dimension nominale. Les courants admissibles indiqués dans les tableaux ont été choisis de manière à tenir compte de ces variations de valeurs avec sécurité et à relier les valeurs par une courbe régulière en fonction de la section nominale des Conducteurs.
G. by its own weight in vertical runs) a suitable type of cable or conductor with appropriate crosssectional areas and method of mounting shall be selected in such a manner that the conductors or cables do not suffer damage by their own weight. 5) Wiring systems intended for the drawing in or out of conductors or cables shall have adequate means of access to allow this operation. 6) Wiring systems buried in floors shall be sufficiently protected to prevent damage caused by the intended use of the floor.
1 The risk of spread of fire shall be minimized by the selection of appropriate materials and erection in accordance with clause 522. Wiring systems shall be installed so that the general building structural performance and fire safety are not reduced. 2 Cables complying with, at least, the requirements of IEC 60332-1 and products having the necessary fire resistance specified in IEC 60614 and in other IEC standards for wiring systems may be installed without special precautions. 3 NOTE In installations where particular risk is identified, cables complying with the more onerous tests for bunched cables described in IEC 60332-3-24 may be necessary.