The smoke resistance test places a high current through the wire/cable to determines if the insulation/jacket will produce smoke. The current is increase on the specimen until the conductor temperature reaches the rated insulation temperature.
This test can be adjusted to examine the impact of wires/cables or secondary protection in the same harness. This of particular use for installed applications.
The following are some parameters that can be adjusted:
Other wires/cables in harness or secondary harness protection
Perform visual examination of the specimen. Record any observed defects.
Attach test specimen to the circuit. Ensure specimen in weighted on one end to prevent sagging.
Apply test current. Increase current to sample until specimen conductor has reached the target temperature.
Observe the specimen for the specified duration. Record any observed smoke.
Report the specimen conductor temperature, applied current, and if any smoke was observed.