IEC 61386-21:2021 pdf free download

IEC 61386-21:2021 pdf free download Conduit systems for cable management – Part 21: Particular requirements – Rigid conduit systems
1 scope
Clause 1 of lEC 61386-1:2008 is applicable, except as follows:Addition:
This part of lEC 61386 specifies the requirements for rigid conduit systems.
2Normative references
Clause 2 of lEC 61386-1:2008 and of lEC 61386-1:2008/AMD1:2017 are applicable, except asfollows:
Addition:
IEC 61386-1:2008,Conduit systems for cable management – Part 1: General requirementsIEC61386-1:2008IAMD1:2017
Terms and definitions
Clause 3 of EC 61386-1:2008 and of lEC 61386-1:2008/AMD1:2017 are applicable.
4 General requirements
Clause 4 of lEC 61386-1:2008 is applicable.
5 General conditions for tests
Clause 5 of lEC 61386-1:2008 and of lEC 61386-1:2008/AMD1:2017 are applicable.
6Classification
Clause 6 of lEC 61386-1:2008 is applicable, except as follows:
Classifications 6.1.1，1;6.1.2，1;6.1.3，2; 6.1.3，3;6.1.3，4;6.1.4，1; and 6.1.5，1 are notapplicable.
NOTE Rigid conduit systems according to 6.1.1,2 and 6.1.2,2 and classification 1 from 6.2.1,Table 1 are notallowed in France.
7 Marking and documentation
Clause 7 of lEC 61386-1:2008 and of lEC 61386-1:2008/AMD1:2017 are applicable, except asfollows:
7.1.101 The conduit shall be marked in accordance with 7.1 along its entire length at regularintervals of preferably 1 m but not longer than 3 m and each length shall be marked at leastonce.
Compliance is checked by inspection.
7.1.102 The manufacturer shall document，for the conduit system,the minimum insidediameter and the classification in accordance with Clause 6.
Compliance is checked by inspection of the documentation.
7.1.103 The manufacturer shall declare whether the conduit is bendable and provide allinformation，instructions and, if necessary, bending aids for proper and safe bending of theconduit.
Compliance is checked by inspection and by the tests specified in 10.4 and 10.6.
8Dimensions
Replacement:
8.1 Threads and outside diameters shall comply with lEC 60423.
Compliance is checked by means of the gauges specified in lEC 60423.
8.2Threadable conduits and threadable conduit fittings,except terminating conduit fittings,shall comply with Table 101.Non-threadable conduit fittings,except fittings which are part ofa conduit system declaring tensile strength,shall comply with Table 102.The minimum insidediameter of the conduit system shall be as declared by the manufacturer.
Compliance is checked by measurement.
9 Construction
Clause 9 of IEC 61 386-1 :2008 is applicable.
10 Mechanical properties
Clause 1 0 of IEC 61 386-1 :2008 and of IEC 61 386-1 :2008/AMD1 :201 7 are applicable, except as follows:
10.2 Compression test
Subclause 10.2 is applicable with the following addition:
10.2.4 Add the following note at the end of Subclause 10.2.4:
NOTE In order to achieve a uniformly increasing compression force, the force indicated in Table 4 is divided by time; this value is the required rate per second to fulfil the requirement.
Example: For a test force of 750 N an increase of the test force of 25 N/s is required (750 divided by 30 equals 25).
Informative Annex AA gives detailed calculations including tolerances for time and force.
1 0.4 Bending test
Replacement:
Conduits which are declared by the manufacturer as being bendable are tested in accordance with 10.4.101, 10.4.102 or 10.4.103.
Addition:
10.4.101 Metallic conduits
10.4.101 .1 Conduit sizes 16, 20 and 25 are subjected to a bending test by means of the apparatus shown in Figure 101. Testing of other sizes is in accordance with the manufacturer’s instructions.