Flammability is perhaps one of the most common and most important tests performed on aerospace wiring. This is why every modern wire/cable type has some requirement for flammability assessment. In general, a length of the wire/cable under test is placed in a draft-free chamber and hung free over a high-temperature flame for 30 seconds – 15 minutes (specification dependent). A piece of tissue paper is placed under the sample to catch falling debris. The sample is considered failed (again specification dependent) if one or more of the following conditions has occurred:
- The burn length on the sample has exceeded a specified length
- The sample continues to burn for more than three seconds (specification dependent) after the flame has been removed
- The tissue paper under the sample had ignited due to failing debris from the sample
Please note that because there are so many methods, each requiring different physical configurations, sample preparations, etc., the price for the particular test method may vary. Please contact Lectromec directly for pricing of your particular flammability test needs.
See also: Resistance to Flame Propagation