This technical specification describes a test method used to determine the characteristic heat
flux for ignition (CHFI) from a non-contacting flame source for materials used in
electrotechnical products and sub-assemblies. It provides a relationship between ignition time
and incident heat flux. A test specimen cut from an end-product or sub-assembly can be
tested by this test method.
This basic safety publication is intended for use by technical committees in the preparation of
standards in accordance with the principles laid down in IEC Guide 104 and
ISO/IEC Guide 51.
One of the responsibilities of a technical committee is, wherever applicable, to make use of
basic safety publications in the preparation of its publications. The requirements, test
methods or test conditions of this basic safety publication will not apply unless specifically
referred to or included in the relevant publications.