Fire Testing Reduced Fire Propagation in accordance with IEC This test is the most common one to verify the behaviour of a cables for the fire propagation. The standard is subdivided in several parts that differ one from the other for the quantity of cable to be installed, the installation mode and the flame application time. Tests on electric and optical fiber cables under fire conditions - Part Test for vertical flame spread of vertically mounted bunched wires or cables.
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IEC IEC This part of IEC specifies a method to test on a single vertical insulated wire or cable under the conditions and the requirements for compliance. The flame shall be applied continuously for the period of time corresponding to the diameter shown in the table. The wire or cable shall pass the test in the distance between the lower edge on the top support and the onset of charring is greater than 50 mm.
In addition, a failure shall be recorded if burning extends downwards to appoint greater than mm from the lower edge of the top support. If the failure is recorded two more tests shall be carried out. If both test results in passes, the wire or cable shall be deemed to have passed the test.
IEC This part of IEC specifies a method of testing a small insulated wire under the fire conditions when the method specified in IEC is not suitable because some small conductors may melt during the application of the flame. The ignition source is a gas burner fed with propane. IEC The test sample is comprise a number a test pieces of cable from the same length, each having a minimum length of 3,5 m.
After burning the maximum extend of the charred portion of test sample should not have reached a height exceeding 2,5 m above the bottom edge of the burner, neither at the front nor the rear of the ladder.
IEC and IEC are used to assess the flame propagation characteristics of a single wire. IEC is used to assess the flame propagation characteristics of bundled cables. In this test, a 60cm cable sample is fixed vertically inside a metallic box and a mm long flame is applied at 45C from a gas burner placed at mm from the top at the upper portion. The specimen is deemed to have passed this test, of after burning has ceased, the charred or affected position does not reach within 50mm of the lower edge of the top clamp which is equivalent to mm above the point of flame application. The test method is not suitable for the testing of some small wires due to the melting of the conductors during the time of application of the flame. In this test, a cable specimen, consisting of number of 3. The cable specimen is deemed to have met the requirements of the standard if, after burning has ceased, the extent of charred or affected portion does not reach a height exceeding 2.
IEC 332-3 PDF
Reduced Fire Propagation in accordance with IEC This test is the most common one to verify the behaviour of a cables for the fire propagation. IEC cable suitable for direct burial not for application in power circuits installation in free air without UV-protection cable UV-resistant cable with EAC-approval cable conform to Low Voltage directive. Code of practice for system design, installation, and maintenance. If both test results in passes, the wire or cable shall be deemed to have passed the test. The legal basis for using these tracking services is section 6. You can customize the tracking services and delete web tracking cookies here: Test for vertical flame spread of vertically- mounted bunched wires or cables — Category C -Installation In one layer front. Please inform us formally before our uec and confirm the design firstly based on our sample.