Cable testing for NFF16-101/NFC32-070
1. NFF16-101/NFC32-070 cable testing--Standard
NFF16-101-Railway rolling stock fire behavior choice of material
NFC 32-070: Insulated conductors and cables for installation-Classification tests on conductors and cables with regard to fire behaviour.
As the cable flame spread and burning rate of destruction of the length of the combustion smoke density (light penetration) and the burning of hazardous toxic gas escape on the staff of life play a very important influence. In general, testing cables through these areas to assess。
NFF16-101 only testing for cable insulation, to assess the fire retardant properties of the cable. (Due to the metal conductor and the wire cable with non-flammable)
2. NFF16-101/NFC32-070 cable testing--Scope
This standard is application to all non-metallic materials, with the exception of paintwork where they form part of passenger railcars, cabins, vans, observation railcars, wagons and their trailers, including drivers’ cabins where they exist as well as engine drivers’ cabins.
3. NFF16-101/NFC32-070 cable testing—Test item and standard
F-class smoke toxicity testing: F0-F5 (F0, F1, F2, F3, F4, F5) according to NF X 10-702 (smoke density test) and the NF X 70-100 (toxicity testing) together to assess the level F smoke toxicity
Wire and cable C1, C2 level test: NF C 32-070 C1, C2, NF C 32-070 C1-level cable test requirements stricter than the NF C 32-070 C2 Multi. C1 grade flame retardant cables used in place stringent requirements, testing is carried out using specialized equipment. Test when a 160CM cable hung vertically on the sample rack, the role of radiation under the ignition furnace test, tests 30MIN, 10MIN stop every ventilation 1MIN, test, cable intact chimneys above, the cable C1 level.
4. NFF16-101 /NF C 32-070 C1、C2
Conductors and electrical cables shall satisfy test no .1 of NFC32-070.
Afterwards they are subjected to test no.2 of the same standard, and, according to the results, they are classified in the four classes A, B, C and D which are defined in table 2.
|
Class |
Result of test no.2 |
|
A |
No ignition and no degradation beyond the upper part of the furnace |
|
B |
The length of degradation beyond the upper part of the furnace does not exceed 50mm |
|
C |
The length of degradation beyond the upper part of the furnace does not exceed 300mm |
|
D |
The length of degradation does not exceed the top of the flue |
|
NC |
The length of degradation exceeds the top of the flue |
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