AS/NZS IEC 60331.3:2021
Tests for electric cables under fire conditions - Circuit integrity, Part 3: Test method for fire with shock at a temperature of at least 830°C for cables of rated voltage up to and including 0,6/1,0 kV tested in a metal enclosure
Standard identically adopts IEC 60331-3:2018 for Australia and New Zealand which specifies the test method for cables which are required to maintain circuit integrity when tested in a metal enclosure and when subject to fire and mechanical shock under specified conditions. It is applicable to cables of rated voltage not exceeding 600 V/1 000 V, including those of rated voltage below 80 V, metallic data and telecom cables and optical fibre cables and testing cables not greater than 20 mm overall diameter.
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AS/NZS IEC 60331.3:2021 Tests for electric cables under fire conditions - Circuit integrity Test method for fire with shock at a temperature of at least 830ﾰC for cables of rated voltage up to and including 0.6/1.0 kV tested in a metal enclosure
CONTENTS
FOREWORD
INTRODUCTION
1 Scope
2 Normative references
3 Terms and definitions
4 Test environment
5 Test apparatus
5.1 Test equipment
5.2 Metal enclosure
5.2.1 Material and dimensions
5.2.2 Metal enclosure selection
5.3 Test ladder and mounting
5.4 Source of heat
5.4.1 Burner
5.4.2 Flow meters and flow rates
5.4.3 Verification
5.5 Shock-producing device
5.6 Positioning of source of heat
5.7 Continuity checking arrangements for electric power and control cables with rated voltage up to and including 600 V/1€000€V
5.8 Fuses
6 Test specimen (electric power and control cables with rated voltage up to and including 600 V/1€000€V)
6.1 Test specimen preparation
6.2 Test specimen mounting
7 Test procedure (electric power and control cables with rated voltage up to and including 600 V/1€000€V)
7.1 Test equipment and arrangement
7.2 Electrical connections
7.3 Flame and shock application
7.4 Electrification
8 Performance requirements (electric power and control cables with rated voltage up to and including 600 V/1€000€V)
8.1 Flame application time
8.2 Acceptance criteria
9 Retest procedure
10 Test report (electric power and control cables with rated voltage up to and including 600 V/1€000€V)
Annex€A (normative)Verification procedure for the source of heat
A.1 Measuring equipment
A.2 Procedure
A.3 Evaluation
A.4 Further verification
A.5 Verification report
Annex€B (informative)Guidance on the choice of recommended test apparatus(burner and venturi)
Bibliography
Figures
Figure 1 – Schematic diagram of test configuration
Figure 2 – Recommended method of mounting the metal enclosureto the test ladder
Figure 3 – Plan view of fire test equipment
Figure 4 – End elevation of fire test equipment(not to scale)
Figure 5 – Typical rubber bush for supporting the test ladder
Figure 6 – Burner face
Figure 7 – Schematic diagram of an example of a burner control system
Figure 8 – Basic circuit diagram
Figure A.1 – Temperature measuring arrangement
Tables
Table 1 – Enclosure dimensions
Table 2 – Multicore sheathed cable
Table 3 – Single core unsheathed or sheathed cable
Previous versions
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AS/NZS IEC 60331.3:2021 Tests for electric cables under fire conditions - Circuit integrity Test method for fire with shock at a temperature of at least 830ﾰC for cables of rated voltage up to and including 0.6/1.0 kV tested in a metal enclosure
CONTENTS
FOREWORD
INTRODUCTION
1 Scope
2 Normative references
3 Terms and definitions
4 Test environment
5 Test apparatus
5.1 Test equipment
5.2 Metal enclosure
5.2.1 Material and dimensions
5.2.2 Metal enclosure selection
5.3 Test ladder and mounting
5.4 Source of heat
5.4.1 Burner
5.4.2 Flow meters and flow rates
5.4.3 Verification
5.5 Shock-producing device
5.6 Positioning of source of heat
5.7 Continuity checking arrangements for electric power and control cables with rated voltage up to and including 600 V/1€000€V
5.8 Fuses
6 Test specimen (electric power and control cables with rated voltage up to and including 600 V/1€000€V)
6.1 Test specimen preparation
6.2 Test specimen mounting
7 Test procedure (electric power and control cables with rated voltage up to and including 600 V/1€000€V)
7.1 Test equipment and arrangement
7.2 Electrical connections
7.3 Flame and shock application
7.4 Electrification
8 Performance requirements (electric power and control cables with rated voltage up to and including 600 V/1€000€V)
8.1 Flame application time
8.2 Acceptance criteria
9 Retest procedure
10 Test report (electric power and control cables with rated voltage up to and including 600 V/1€000€V)
Annex€A (normative)Verification procedure for the source of heat
A.1 Measuring equipment
A.2 Procedure
A.3 Evaluation
A.4 Further verification
A.5 Verification report
Annex€B (informative)Guidance on the choice of recommended test apparatus(burner and venturi)
Bibliography
Figures
Figure 1 – Schematic diagram of test configuration
Figure 2 – Recommended method of mounting the metal enclosureto the test ladder
Figure 3 – Plan view of fire test equipment
Figure 4 – End elevation of fire test equipment(not to scale)
Figure 5 – Typical rubber bush for supporting the test ladder
Figure 6 – Burner face
Figure 7 – Schematic diagram of an example of a burner control system
Figure 8 – Basic circuit diagram
Figure A.1 – Temperature measuring arrangement
Tables
Table 1 – Enclosure dimensions
Table 2 – Multicore sheathed cable
Table 3 – Single core unsheathed or sheathed cable
Previous versions
AS/NZS IEC 60331.3:2021
Online Library subscription information
Online library subscriptions provide a cost-effective solution for organisations of any size to access the latest standards, offering 24/7 access to a personalised catalogue. The service ensures subscribers have have the most up-to-date version of selected standards, incluing automatic updates for any amendments or versions. Pricing is dependent on the chosen standards and the number of concurrent users, with discounts applied from the standards PDF price. For customised subscriptions or further inquiries, contact the Online Library team.