Fire Testing
Flame Retardance
2. Reduced fire propagation in accordance with NF C32-070-2.2(C1)
NF C32-070 :2001 Insulated conductors and cables for installation.
-Classification tests on conductors and cables with regard to fire behavior.
A 1600mm vertically installed bundled of cable is exposed to the effects of a radiating oven (approx 830°C) and
forced ventilation. Pilot flames arranged above the oven burn off the emitted gases. The test duration is 30
minutes, with the ventilation stopped for every 10 minutes during the flame application period. The cable sample
is classified under Category C1 according to NF F 32070-2.2 if the carbonised part of the cable sample does not
extend more than 0.8m above the upper base of the oven.
Depending on the damaged length, they can be further classified into 4 classes A, B, C and D according to NF F
16-101 as follows:
| Category | Test Result |
| A | No damaged length from top of the oven in upper position. |
| B | Damaged length from top of oven in upper position not extending more than 50mm. |
| C | Damaged length from top of oven in upper position not extending more than 300mm |
| D | Damaged length from top of oven in upper position not extending above the top of the chimney |