Determine the cable of rated voltage not exceeding 600/1,000 V capability to maintain circuit integrity under fire conditions.
• Reference Standard
BS 6387 – Test method for resistance to fire of cables required to maintain circuit integrity under fire conditions
• Test Detail
The flame test temperature used and the test duration to category C 950 ± 40°C for 3 hours
The sample shall be a piece of completed cable not less than 1200 mm long. Connect each conductor of sample to a separate phase of transformer output with a 2 A fuse or circuit breaker in each phase.
Switch on the electricity supply and adjust the voltage between phases to the rated voltage U (or in the case of a single core cable to the rated voltage to earth, U0 ).
Light the burner and adjust the air and gas supply to achieve the temperature required.
• Performance Requirement
None of circuit breaker trips and none of the lamps is extinguished during the period of test