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IEC 60332-3-21 : 1.0

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IEC 60332-3-21 : 1.0

TESTS ON ELECTRIC CABLES UNDER FIRE CONDITIONS - PART 3-21: TEST FOR VERTICAL FLAMES SPREAD OF VERTICALLY-MOUNTED BUNCHED WIRES OR CABLES - CATEGORY A F/R

International Electrotechnical Committee

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Table of Contents

FOREWORD
INTRODUCTION
1 Scope
2 Normative references
3 Definitions
4 Test apparatus
      4.1 General
      4.2 Ignition source
5 Test procedure
      5.1 Test sample
      5.2 Determination of the number of test pieces
      5.3 Mounting of the test sample
      5.4 Flame application time
6 Evaluation of test results
7 Performance requirements
8 Retest procedure
9 Test report
Annex A (normative) Guidance on cable selection for type
                    approval testing
Annex B (informative) Recommended performance requirements
Figure 1 - Typical arrangement and spacing of cables mounted
           on both sides of the standard ladder (category
           A F/R)
Table A.1 - Summary of test conditions

Abstract

Defines the category A F/R and relates only to power cables of conductor cross-sectional area greater than 35mm square, installed on the test ladder in a spaced configuration on the rear and front to achieve a nominal total volume of non-metallic material of 7 l/m of test sample. Intended for special cable designs used particularly of installations when the cable specification is required. Not intended for use in category A F/R. The application time is 40 minutes.

General Product Information

Document Type Standard
Status Current
Publisher International Electrotechnical Committee
Committee TC 20
Supersedes
  • IEC 60332-3 : 2.0