IEC 61386-23 pdf download – Conduit systems for cable management – Part 23: Particular requirements – Flexible conduit systems
1 Scope
This clause of part 1 is applicable, except as follows:
Addition:
This part of IEC 61 386 specifies the requirements for flexible conduit systems.
2 Normative references
This clause of part 1 is applicable.
3 Definitions
This clause of part 1 is applicable.
4 General requirements
This clause of part 1 is applicable.
5 General conditions for tests
This clause of part 1 is applicable.
6 Classification
This clause of part 1 is applicable, except as follows:
Subclauses 6.1 .3 1, 6.1 .3 2 and 6.1.3 3 are not applicable.
NOTE Flexible conduit systems according to 6.1 .1 1 , 6.1 .1 2, 6.1 .2 1 , 6.1 .2 2 and classification 1 X from 6.2.1 ,table 1 are not allowed in France.
7 Marking and documentation
This clause of part 1 is applicable, except as follows:
Addition:
7.1 .101 The conduit shall be marked in accordance with 7.1 along its entire length at regular intervals of preferably 1 m but not longer than 3 m. Where this is technically impractical, the
mark shall be on a label attached to the product at each end, or on the packaging.
Compliance is checked by inspection.
7.1.102 The manufacturer shall document or add to the packaging for the system theminimum inside diameter，the minimum bend radius and the classification in accordance withclause 6.
Compliance is checked by inspection.
8Dimensions
Replacement:
8.1 Threads shall comply with lEC 60423.
Compliance is checked by means of the gauges specified in lEC60423.
8.2The minimum inside diameter of the conduit system shall be as declared by themanufacturer.
Compliance is checked by measuremenf.
g construction
This clause of part 1 is applicable.
10 Mechanical properties
This clause of part 1 is applicable, except as follows:
10.1 Mechanical strength
10.1.1Addition:
NOTE very light flexible conduits should not be considered as providing adequste mechanical protection andshould not be used within the construction of buildings.
10.4Bending test
This subclause of part 1 is not applicable.
10.5Flexing test
10.5.101 An assembly consisting of a conduit with a terminating conduit fitting,assembled inaccordance with the manufacturer’s instructions, shall be subjected to a flexing test by meansof the apparatus shown in figure 101.
10.5.102 The test shall be made on six samples of conduit of an appropriate length. Three ofthe samples shall be tested at the minimum declared transport,application and installationtemperature as given in table 1 with a tolerance of t2°C. The other three samples shall betested at the maximum declared application and installation temperature as given in table 2with a tolerance of ±2°c.
A manufacturer may declare that a flexible conduit is suitable for transport and installation according to table 1 but may only be suitable for flexing at ambient temperature as a minimum. In this case the test shall be carried out at (20 ± 2) °C and the 3rd digit of the classification code shall be X. The manufacturer shall clearly declare in his literature both the minimum transport and installation temperature in accordance with table 1 , the minimum application temperature which is ambient and the maximum installation and application temperature in accordance with table 2.
10.5.1 03 The sample shall be fixed to the oscillating member by means of the terminating conduit fitting as shown in figure 1 01 , so that when the conduit is at the middle of its travel, the axis of the conduit is vertical and passes through the axis of the oscillation. The apparatus with the sample shall be conditioned for 2 h or until the sample has attained the declared temperature, whichever period is the longer.
10.5.1 04 The oscillating member shall be moved backwards and forwards through a total angle of (1 80 ± 5)° divided equally about the vertical axis. The assembly shall be subjected to 5 000 flexings at a rate of (40 ± 5) flexings per minute. A flexing constitutes, starting from the vertical position, one continuous cycle of movement of essentially sinusoidal forms.
10.5.1 05 After the test, the sample shall show no sign of disintegration, nor shall there be any cracks visible to normal or corrected vision without magnification.
10.6 Collapse test
This subclause of part 1 is not applicable.
10.7 Tensile strength
This subclause of part 1 is applicable, except as follows:
10.7.3 Replacement:
For conduit systems where tensile strength is not declared, the tensile strength of the joint shall comply with classification 1 in table 6.
IEC 61386-23 pdf download – Conduit systems for cable management – Part 23: Particular requirements – Flexible conduit systems
