BS EN 60695-7-3:2011
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Fire hazard testing – Toxicity of fire effluent. Use and interpretation of test results
| Published By | Publication Date | Number of Pages |
| BSI | 2011 | 38 |
IEC 60695-7-3:2011 concerns laboratory tests used to measure the toxic components of the fire effluent from either electrotechnical products or materials used in electrotechnical products. It provides guidance on the use and interpretation of results from such tests. It discusses currently available approaches to toxic hazard assessment consistent with the approach of ISO TC 92 SC 3, as set out in ISO 13344, ISO 13571, ISO 16312-1, ISO 16312-2, ISO 19701, ISO 19702 and ISO 19706. It also provides guidance on the use of toxic potency data in fire hazard assessment and on principles which underlie the use of combustibility and toxicological information in fire hazard assessment. The methods described are applicable to data concerning both the incapacitating effects and the lethal effects of fire effluents. This first edition cancels and replaces the second edition of IEC/TS 60695-7-3 published in 2004. It constitutes a technical revision and now has a status of an International Standard. The main changes with respect to the previous edition are listed below: – change of designation from a Technical Specification to an International Standard; – the Foreword, Introduction, and Clauses 1, 2 and 3 have been updated; – expanded in all areas to further clarify the alignment with ISO/TC 92 Fire Safety and in particular with ISO 13344, ISO 13571, ISO/IEC 13943, ISO 16312-1, ISO 16312-2, ISO 19701, ISO 19702 and ISO 19706. It has the status of a horizontal standard in accordance with /2 and ISO/IEC Guide 51. This publication is to be read in conjunction with /2 and /2.
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 7 | English CONTENTS |
| 9 | INTRODUCTION |
| 10 | 1 Scope 2 Normative references |
| 11 | 3 Terms and definitions |
| 17 | 4 Principles of toxic hazard assessment 4.1 General |
| 18 | 4.2 Exposure dose Figures Figure 1 – Exposure dose as a function of time and concentration |
| 19 | 4.3 Determination of concentration-time data Figure 2 – Time dependent components of fire hazard |
| 20 | 4.4 Asphyxiants and the fractional effective dose, FED |
| 22 | 4.6 Carbon dioxide 4.7 Oxygen vitiation 4.8 Heat stress 4.9 Effects of stratification and transport of fire atmospheres 5 Methods of toxic hazard assessment 5.1 General approach 5.2 Equations used to predict death |
| 23 | Tables Table 1 – Some toxic potency values |
| 24 | 5.3 Equations used to predict incapacity |
| 25 | 6 Toxic potency values 6.1 Generic values of toxic potency 6.2 Toxic potency values obtained from chemical analyses 6.3 Toxic potency values obtained from animal tests 7 Limitations on the interpretation of toxicity test results |
| 26 | 8 Effluent components to be measured 8.1 Minimum reporting 8.2 Additional reporting |
| 27 | Table 2 – Combustion products |
| 28 | Annex A (informative) Guidance for the use of LC50 values |
| 31 | Annex B (informative) A simple worked example to illustrate the principlesof a toxic hazard analysis |
| 32 | Figure B.1 – Flame spread rate for materials A and B |
| 33 | Table B.1 – Example FED calculation data for material A Table B.2– Example FED calculation data for material B |
| 34 | Figure B.2 – Relative toxic hazard of two materials – time to lethality, i.e. FED ≥ 1 |
| 35 | Annex C (informative) F values for irritants Table C.1 – F values for irritants |
| 36 | Bibliography |
