Standard Test Method for Using Cone Calorimeter to Determine Fire-Test-Response Characteristics of Insulating Materials Contained in Electrical or Optical Fiber Cables

Importancia y uso:

5.1 This test method is used to determine the heat release rate and a number of other fire-test-response characteristics as a result of exposing insulating materials contained in electrical or optical cables to a prescribed initial test heat flux in the cone calorimeter apparatus.

5.2 Quantitative heat release measurements provide information that is potentially useful for design of electrical or optical cables, and product development.

5.3 Heat release measurements provide useful information for product development by giving a quantitative measure of specific changes in fire performance caused by component and composite modifications. Heat release data from this test method will not be predictive of product behavior if the product will not spread flame over its surface under the fire exposure conditions of interest.

5.4 The fire-test-response characteristics determined by this test method are affected by the thickness of the material used as test specimen, whether as a plaque or as coating on a wire or cable. The diameter of the wire or cable used will also affect the test results.

5.5 A radiant exposure is used as an energy source for this test method. This type of source has been used for comparison with heat release rate and flame spread studies of insulating materials constructed into cables when burning in a vertical cable tray configuration (Test Methods D5424 and D5537) (2-9). No definitive relationships have been established.

5.6 The value of heat release rate corresponding to the critical limit between propagating cable fires and non-propagating fires is not known.

5.7 This test method does not determine the net heat of combustion.

5.8 It has not been demonstrated that this test method is capable of predicting the response of electrical or optical fiber cables in a full scale fire. In particular, this test method does not address the self-extinguishing characteristics of the cables in a full scale fire.

Subcomité:

D09.17

Referida por:

D5485-21, E2067-23, E2102-21, E2061-23

Volúmen:

10.02

Número ICS:

13.220.40 (Ignitability and burning behaviour of materials and products), 29.035.01 (Insulating materials in general), 33.180.10 (Fibres and cables)

Palabras clave:

cable; cone calorimeter; electrical cable; electrical insulation; fire; fire-test response; heat release; heat release rate; optical fiber cable; oxygen consumption calorimetry; smoke obscuration;