EN 61482-1-1:2009

FOREWORD
1 Scope
2 Normative references
3 Terms, definitions and symbols
4 Principle of the test methods
5 Significance and use of the test methods
6 Test apparatus
7 Precautions
8 Specimen preparation
9 Calibration
10 Test apparatus care and maintenance
11 Test procedures
12 Interpretation of results
13 Test report
Annex A (normative) Measurement of char length
Annex B (informative) Logistic regression technique
Annex C (informative) Heat attenuation factor
Bibliography
Annex ZA (normative) Normative references to international
         publications with their corresponding European
         publications

IEC 61482-1-1:2009 specifies test methods to measure the arc thermal performance value of materials intended for use in heat- and flame-resistant clothing for workers exposed to the thermal effects of electric arcs and the function of garments using these materials. These test methods measure the arc thermal performance value of materials which meet the following requirements: less than 100 mm char length and less than 2 s afterflame after removal from flame, when tested in accordance with ISO 15025, procedure B (bottom-edge ignition) on the outer material, and the char length measured using a modified ISO method as described in Annex A. These methods are used to measure and describe the properties of materials, products, assemblies or garments, in response to convective and radiant energy generated by an electric arc in open air under controlled laboratory conditions. The materials used in these methods are in the form of flat specimens for method A and garments for method B. Method A is used to determine the arc rating of materials and material assemblies when tested in a flat configuration. Method B is used to measure garment response, not arc rating, to an arc exposure including all the garment findings, sewing thread, fastenings, fabrics and other accessories when tested on a male mannequin torso. Method B is also used for accident replication.