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 NF P 92-503: M classification combustion test  
NF P 92-503: Electrical burner test used for flexible materials thickness no more than 5mm 
A specimen in placed in a specimen holder at 30° above a radiator which gives out heat(30kW/m²). A small butane flame is applied directly to the fabric surface.  The following aspects are recorded:   
- duration of the flame 
- production of burning droplets  
- length/width of the damaged specimen 
If specific, unusual, specimen behaviour is observed additional supplementary tests may be required.  
  
M Classification: M0-M4(M0、M1、M2、M3、M4) 
  
 
Other Standard 
 
NF P 92-501: Building materials- Reaction to fire tests, radiation test used for rigid material or flexible materials thickness more than 5mm.  
NF P 92-503: Electrical burner test used for flexible materials thickness no more than 5mm  
NF P 92-504: speed of spread of flame test used for the materials which are not intended to be glued on a rigid substrate. 
NF P 92-505: Dripping test with electrical radiator, used for melting materials.  
  
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