European Committee for Electrotechnical Standardization

Fire hazard testing - Part 11-10: Test flames - 50 W horizontal and vertical flame test methods
 N EN 60695-11-10

Annotation

This part of IEC 60695 specifies small-scale laboratory test procedures intended to compare the burning behaviour of different materials used in electrotechnical products when vertically or horizontally oriented test bar specimens are exposed to a small flame ignition source with a nominal thermal power of 50 W. These test methods determine either the linear burning rate or the self-extinguishing properties of materials.

These test methods are applicable to solid and cellular materials that have an apparent density of more than 250 kg/m3, determined in accordance with ISO 845.

Two test methods are described. Method A is a horizontal burning test and is intended to determine the linear burning rate of materials under specific test conditions. Method B is a vertical burning test and is intended to determine whether materials self-extinguish under specific test conditions.

NOTE 1 ISO 9772 [8]1 describes a test method for the determination of the burning characteristics to be used for materials with an apparent density of 250 kg/m3 or less. ISO 9773 describes a test method for the determination of the burning behaviour to be used for materials that due to their thinness, either distort and/or are burned up to the holding clamp using Method B of this standard.

The test methods described provide classifications (see 8.4 and 9.4), which may be used for quality assurance, the pre-selection of component materials of products, or to verify the required minimum flammability classification of materials used in end products.

NOTE 2 Guidance on pre-selection is given in IEC 60695-1-30.