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This test is carried out to verify circuit integrity even during a fire.
A sample of cable is held horizontally over a ribbon flame at about 750 °C. A test voltage is applied continuously for a period of 3 hours to the cable and no break or short circuit should occur in the cable. (not supplied). Complying with Standard: IEC 60331-11, BS 6387(C-W-Z), EN 50200, procedure IEC 60331-21.
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Sample supporting system:
Control device for flow rate:
It is thus recommended that a standard test chamber, i.e. the design of 27 m3 volume in accordance with IEC 61034-1, be used.