Purchase your copy of IEC as a PDF download or hard copy directly from the official BSI Shop. All BSI British Standards. IEC Tests for electric cables under fire conditions – Circuit integrity – Part 1: Test method for fire with shock at a temperature of at least °C for. IEC / IEC Test method for fire with shock. Test set-up The cable is secured onto a positioning board and a flame is applied.
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Circuit insulation Integrity in accordance with IEC IEC specifies tests for electric cable for circuit integrity under fire conditions.
It is divided in following parts that describe the test modes, the conditions, and the equipment to use. To better simulate the real fire 603311-1, with mechanical stresses due to the fall of materials and with the presence of water, the testing conditions have been modified by changing the duration, increasing the temperature of the flame and by adding mechanical stresses and water spray.
IEC ed 1.
Procedures and requirements — Cables of rated voltage up to and including 0. Procedures and requirements — Electric Data Cables. Procedures isc requirements — Optic Fiber Cables.
Tests for electric cables for fire conditions and shock- Circuit integrity. Procedures and requirements for fire with shock — Cables of rated voltage up to and including 0.
During the test, to the wire cores of cable a voltage of the nominal value is applied for telecommunication cables equal to Vthereby creating a closed electric circuit.
The time of the fire is minutes.
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Result of the test is considered positive if at that time will not be considered a short circuit in the circuit being researched. IEC details a method to assess the circuit integrity of optical fiber cables.
The optical power 60313-1 is zeroed and the changes in attenuation during the minutes burner application period are monitored. The maximum change in attenuation a change from zero is recorded during the burner application period.
In the 15 minutes period after the flame application, a maximum attenuation is also recorded. Result of the test is considered positive if at that time will not be considered a short circuit in the circuit being tested. IEC applies to the cables with a diameter greater than 20mm, and introduces the standards nd procedures for testing of cables exposed to fire and mechanical shock equipment according to The test sample provides cable fragment length at least mm.
Bent wire on the U-shaped with a adius equal to the smallest permissible by the manufacturer, is mounted on a metal assay ladder. During the study, through all the cable wires is passed current with rated voltage and these cables are subjected to fire during min, where fire source is a gas burner set in conformity with standards, as well the echanical shock of the 5 minutes interval.
Result of the test is considered positive if at that time will not e considered a short circuit in the circuit being tested.