This part of IEC 60695 provides a summary of commonly used test methods for the assessment of smoke obscuration. It presents a brief summary of static and dynamic test methods in common use, either as international standards or national or industry standards. It includes special observations on their relevance to electrotechnical products and their materials and to fire scenarios, and gives recommendations on their use.<\/p>\n
This basic safety publication shall be used by technical committees in the preparation of standards in accordance with the principles laid down in IEC Guide 104 and ISO\/IEC Guide 51.<\/p>\n
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.<\/p>\n
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| 2<\/td>\n | undefined <\/td>\n<\/tr>\n | ||||||
| 6<\/td>\n | English CONTENTS <\/td>\n<\/tr>\n | ||||||
| 8<\/td>\n | FOREWORD <\/td>\n<\/tr>\n | ||||||
| 10<\/td>\n | INTRODUCTION <\/td>\n<\/tr>\n | ||||||
| 11<\/td>\n | 1 Scope 2 Normative references 3 Terms and definitions <\/td>\n<\/tr>\n | ||||||
| 15<\/td>\n | 4 Types of of test method 4.1 General 4.2 The physical fire model <\/td>\n<\/tr>\n | ||||||
| 16<\/td>\n | 4.3 Static test methods 4.4 Dynamic test methods <\/td>\n<\/tr>\n | ||||||
| 17<\/td>\n | Tables Table 1 \u2013 Characteristics of fire stages (ISO 19706:2011) <\/td>\n<\/tr>\n | ||||||
| 18<\/td>\n | 5 Types of test specimen 6 Published static test methods 6.1 General 6.2 Determination of smoke opacity in a 0,51 m3 chamber 6.2.1 Standards which use a vertically oriented test specimen <\/td>\n<\/tr>\n | ||||||
| 20<\/td>\n | 6.2.2 Standard which uses a horizontally oriented test specimen <\/td>\n<\/tr>\n | ||||||
| 22<\/td>\n | 6.3 Determination of smoke density in a 27 m3 smoke chamber 6.3.1 Standards 6.3.2 Purpose and principle 6.3.3 Test specimen 6.3.4 Method <\/td>\n<\/tr>\n | ||||||
| 23<\/td>\n | 6.3.5 Repeatability and reproducibility 6.3.6 Relevance of test data and special observations 7 Published dynamic test methods 7.1 General <\/td>\n<\/tr>\n | ||||||
| 24<\/td>\n | 7.2 Determination of smoke density generated by electric cables mounted on a horizontal ladder 7.2.1 Standards 7.2.2 Purpose and principle 7.2.3 Test specimen 7.2.4 Method 7.2.5 Repeatability and reproducibility 7.2.6 Relevance of test data and special observations 7.3 Determination of smoke generated by electrical cables mounted on a vertical ladder 7.3.1 ASTM and UL standards <\/td>\n<\/tr>\n | ||||||
| 25<\/td>\n | 7.3.2 European standard <\/td>\n<\/tr>\n | ||||||
| 27<\/td>\n | 7.4 Determination of smoke using a cone calorimeter 7.4.1 Standards 7.4.2 Purpose and principle 7.4.3 Test specimen 7.4.4 Method <\/td>\n<\/tr>\n | ||||||
| 28<\/td>\n | 7.4.5 Repeatability and reproducibility 7.4.6 Relevance of test data and special observations 7.5 Determination of smoke generated by discrete (non-continuous) products 7.5.1 Standards 7.5.2 Purpose and principle <\/td>\n<\/tr>\n | ||||||
| 29<\/td>\n | 7.5.3 Test specimen 7.5.4 Method 7.5.5 Repeatability and reproducibility 7.5.6 Relevance of test data and special observations 8 Overview of methods and relevance of data <\/td>\n<\/tr>\n | ||||||
| 30<\/td>\n | Table 2 \u2013 Overview of smoke test methods <\/td>\n<\/tr>\n | ||||||
| 32<\/td>\n | Annex A (informative)Repeatability and reproducibility data \u2013 NBS smoke chamber \u2013Interlaboratory tests from the French standard NF C20-902-1 and NF C20-902-2 Table A.1 \u2013 Measurement of Dm <\/td>\n<\/tr>\n | ||||||
| 33<\/td>\n | Annex B (informative)Repeatability and reproducibility data \u2013”Three metre cube” smoke chamber \u2013French interlaboratory tests according to IEC 61034-2 Table B.1 \u2013 Measurement of transmission expressed as a percentage <\/td>\n<\/tr>\n | ||||||
| 34<\/td>\n | Annex C (informative)Repeatability and reproducibility data \u2013 NFPA 262 Table C.1 \u2013 Measurements of Peak Optical Density Table C.2 \u2013 Measurements of Average Optical Density <\/td>\n<\/tr>\n | ||||||
| 35<\/td>\n | Bibliography <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":" Fire hazard testing – Smoke obscuration. Summary and relevance of test methods<\/b><\/p>\n |