IEC 61386-25:2011 pdf – Conduit systems for cable management – Part 25: Particular requirements – Conduit fixing devices.
7.2 Replacement:
The conduit fixing device shall be marked in accordance with 7.1, on the product wherever possible, but where this is impractical, then the mark may be on a label attached to the product, or on the smallest supplied package.
7.3 and 7.4 Not applicable.
8 Dimensions
This clause of Part us replaced by the following text:
Conduit fixing devices shall be capable of accommodating the size or range of conduit
diameters as declared by the manufacturer or responsible vendor. 9 Construction
This clause of Part 1 is applicable except as follows:
Replacement:
9.1 Within the conduit fixing device there shall be no sharp edges. burrs or surface projections which are likely to damage the conduit system, or inflict injury on the installer or user.
Compliance is checked by inspection, if necessary after cutting the samples apart.
9.2 Fixing means shall be designed to withstand the mechanical stresses occurring during installation and normal use.
Screws, if any, used for assembly of the conduit fixing device, shall not cause damage to the conduit system components when correctly assembled.
Compliance for screw fixing using preformed threads is checked by the test in 9.3. followed by inspection.
Compliance for screw fixing using thread-forming screws is checked by the test in 9.4, followed by inspection.
Compliance for reusable fixings other than screws is checked by assembly and removal ten times according to the manufacturers instruction.
Compliance for non-reusable fixings is checked by assembly to the manufacturers instruction.
9.5 and 96 Not applicable.
10 Mechanical properties
This clause of Part 1 is applicable except as follows:
Replacement:
10.1.1 Conduit fixing devices shall have adequate mechanical strength.
10.1.2 Compliance is checked by the tests specified in 10.3, 10. 101 and 10. 102.
10.2 Compression test Not applicable.
10.3.1 Replacement:
Twelve assemblies of a conduit fixing device and a steel mandrel or conduit are subjected to the impact test by means of the apparatus shown in Figure 2.
Conduit fixing devices which can be used with any type of conduit, with outside diameters according IEC 60423, shall be tested using a steel mandrel with an outside diameter according to the minimum diameter of the relevant size.
The manufacturing tolerance of the mandrel shall be (oo2) mm up to and including 20 mm and (0) mm above nominal size 20 mm.
Conduit fixing devices which can only be used with a specific conduit shall be tested using that conduit.
The test assembly is fixed on a vertical surface as shown in Figure 101 or Figure 102 but with only one fixing device.
Conduit fixing devices, whose maximum dimension is less than 20 mm, are not subjected to this test.
10.3.2 Replacement of the last paragraph:
The test shall be made on the weakest part of the conduit fixing device.
10.3.3 Replacement:
After the test, the mandrel or conduit shall remain inside the conduit fixing device and there shall be no sign of disintegration nor shall there be any crack visible to normal or corrected vision without magnification.
At least nine of the twelve samples shall pass the test.
10.4 Bending test Notapplicable.
10.5 Flexing test Not applicable.
10.6 Collapse test Notapplicable.
10.7 Tensile test Notapplicable.
10.8 Suspended load test Not applicable.
Addition:
10.101 Lateral load test
10101.1 Two conduit fixing devices are mounted with a mandrei as shown in figure or with an appropriate length of conduit as shown in Figure 102.
Conduit fixing devices which can be used with any type of conduit, with outside diameters according to IEC 60423, shall be tested using a steel mandrel with an outside diameter according to the minimum diameter of the relevant size,applying a load, including the weightof the steel mandrel, according to the classification in 6.1.101, and Table 101.
The steel mandrel shall have a surface roughness of 7 um Ra in accordance with ISO 4287.Themanufacturing tolerance of the mandrel shall be ( o.o2)mm up to and including 20 mm and(oog) mm above nominal size 20 mm.
Conduit fixing devices which can only be used with a specific conduit shall be tested usingthat conduit and the manufacturer shall declare the performance of the combination of conduitand fixing device.For the purpose of applying the load, a steel rod with an outside diameter of30 % to 50 % of the inside diameter of the conduit is inserted through the conduit and a loadincluding the weight of the steel rod， according to the classification in 6.1.101，and Table101, is applied across the two ends of the steel rod.
The test is carried out on 3 pairs of conduit fixing devices wall mounted and another 3 pairs ofconduit fixing devices ceiling mounted.