BS EN 60695-1-11:2015
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Fire hazard testing – Guidance for assessing the fire hazard of electrotechnical products. Fire hazard assessment
| Published By | Publication Date | Number of Pages |
| BSI | 2015 | 52 |
This part of IEC 60695 provides guidance for assessing the fire hazard of electrotechnical products and for the resulting development of fire hazard testing as related directly to harm to people, animals or property.
It outlines a hazard-based process to identify appropriate fire test methods and performance criteria for products. The principles of the methodology are to identify fire events (fire scenarios) which will be associated with the product, to establish how the measurable fire properties of the product are related to the possible occurrence and outcome of those events, and to establish test methods and performance requirements for those properties which will either result in a tolerable fire outcome or eliminate the event altogether.
It is intended as guidance to IEC committees, to be used with respect to their individual applications. The actual implementation of this document remains the responsibility of each product committee, according to the minimum acceptable fire safety in its application field and taking into account the feedback from experience.
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 [10].
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.
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 4 | European foreword Endorsement notice |
| 5 | Annex ZA (normative) Normative references to international publications with their corresponding European publications |
| 6 | English CONTENTS |
| 8 | FOREWORD |
| 10 | INTRODUCTION |
| 11 | 1 Scope 2 Normative references |
| 12 | 3 Terms and definitions |
| 18 | 4 Elements of fire hazard assessment 4.1 Ignition sources 4.2 Fire hazard 4.3 Fire risk |
| 19 | 4.4 Fire hazard assessment 5 Fire hazard tests |
| 20 | 6 The fire hazard assessment process 6.1 General |
| 21 | 6.2 Definition of the product range and the circumstances of use 6.3 Identification and analysis of fire scenarios 6.3.1 General 6.3.2 Qualitative description of the fire scenario |
| 22 | 6.3.3 Quantitative analysis of the fire scenario |
| 23 | 6.3.4 Simple hypothetical fire scenarios |
| 24 | 6.4 Selection of criteria for acceptable fire scenario outcomes 6.5 Performance requirements 6.6 Interpretation of test results |
| 25 | 6.7 Consequential testing 7 Extent and limitations of the fire hazard assessment 8 Fire test requirements and specifications |
| 27 | Figures Figure 1 – Flowchart 1 for description of the fire scenario |
| 28 | Figure 2 – Flowchart 1A for evaluation of ignitability/flammability |
| 29 | Figure 3 – Flowchart 1B for evaluation of flame propagation and heat release |
| 30 | Figure 4 – Flowchart 1C for evaluation of fire effluent |
| 31 | Figure 5 – Flowchart for description of the range of products and circumstances of use |
| 32 | Annex A (informative) Calculation of acceptable toxic yield values for an electrical insulation material, based on a simple hypothetical fire scenario A.1 Definition of the fire scenario A.2 Irritant fire effluent A.2.1 F values A.2.2 Equation for irritants |
| 33 | A.2.3 Calculation of the Xi values A.3 Asphyxiant fire effluent A.3.1 Exposure dose A.3.2 Equation for asphyxiants Tables Table A.1 – Irritant F values and calculated X values for the defined fire scenario |
| 34 | A.3.3 Calculation of XCO Table A.2 – Asphyxiant X values calculated for the defined fire scenario |
| 35 | A.3.4 Calculation of XHCN Table A.3 – Incapacitation times for hydrogen cyanide |
| 36 | A.4 Carbon dioxide A.5 Conclusions Table A.4 – Multiplication factors for carbon dioxide |
| 37 | Annex B (informative) Use of rigid plastic conduit – A fire hazard assessment B.1 General B.2 Terms and definitions B.3 Products covered by this fire hazard assessment B.4 Circumstances of use B.4.1 Conduit and wiring B.4.1.1 General |
| 38 | B.4.1.2 Location and amount of conduit B.4.1.3 Wiring inside conduit B.4.2 Building construction B.5 Fire scenarios |
| 39 | B.6 Relevant fire behaviour B.6.1 General B.6.2 Modelling the exposure fire Table B.1 – Summary of fire scenario information |
| 40 | B.6.3 Predicting mass loss of the conduit B.7 Results B.7.1 Comparative of fires with and without RPC B.7.2 Assessment of the contribution of RPC to temperature rise B.7.3 Assessment of the contribution of RPC to smoke production |
| 41 | B.7.4 Assessment of the contribution of RPC to the production of toxic effluent |
| 42 | B.8 Interpretation of results – Significance and precision Table B.2 – Time of occurrence of highly hazardous conditions in building corridors |
| 43 | B.9 Conclusions |
| 44 | Figure B.1 – Schematic of conduit installation Figure B.2 – Corridor upper layer temperature (concrete wall) |
| 45 | Figure B.3 – Corridor upper layer temperature (gypsum wall board) Figure B.4 – Flux measured at the conduit 2 m away (concrete wall) |
| 46 | Figure B.5 – Flux measured at the conduit 2 m away (gypsum wall) Figure B.6 – Comparative mass loss rates of furniture and conduit (concrete wall) |
| 47 | Figure B.7 – Comparative mass loss rates of furniture and conduit (gypsum wall board) Figure B.8 – Relative increase of toxicity due to exposed conduit (concrete wall) |
| 48 | Figure B.9 – Relative increase of toxicity due to exposed conduit (gypsum wall board) |
| 49 | Bibliography |
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BS EN 60695-1-11:2015 – TC:2020 Edition
Tracked Changes. Fire hazard testing – Guidance for assessing the fire hazard of electrotechnical products.…
