Connection and fastening systems

Information on cable fastening

Cable fastening
The standard DIN EN 61914 "Cable holders for electrical installations" specifies that cable holders "must be able to accept cables or cable bundles of the diameter specified by the manufacturer or responsible retailer, without tearing or breaking or shearing off the threads of bolts".
During the installation of cables, the current national and international standard must be taken into account, such as DIN VDE 0100 520. "Suitable agents and methods, which prevent damage or changes to the shape", must be used for fastening.
In addition, with masses of cables, DIN VDE 0298 requires the appropriate "load capacities of cables for fixed laying in and on buildings..." to be taken into account when selecting the fastening systems.
Besides these standardising aspects, the end customer/client can/must take specific laying specifications into account.
The fastening spacing for cables is given in DIN VDE 0100-520, June 2003. For example, cables laid horizontally require a spacing of 20x the cable diameter. However, a spacing of 80 cm should not be exceeded. With vertical laying, the clip spacings may be increased but should not exceed 1.5 m.
The table below shows the maximum fastening spacings for cables according to the cable diameter. The laying spacings given in the catalogue, e.g. for cable tidies or Quick clips, are guide values and can only be treated as such.

External diameter of the cables

Maximum spacing for horizontal fastening

Maximum spacing for vertical fastening

mm

mm

mm

D ≤ 9

250

400

9

300

400

15

350

450

20

400

550