AS/NZS 3760:2010
In-service safety inspection and testing of electrical equipment
This Standard is a revision of AS/NZS 3760:2003, and specifies procedures for the safety inspection and testing of low voltage single phase and polyphase electrical equipment, connected to the electrical supply by a flexible cord and/or connecting device, which is new equipment placed into service for the first time, is already in-service, has been serviced or repaired, is returning to service from a second-hand sale, or is available for hire.
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AS/NZS 3760:2010
KEEPING STANDARDS UP TO DATE
Copyright
CONTENTS
REFERENCED DOCUMENTS
FOREWORD
OUTCOME STATEMENT
SECTION 1 – SCOPE AND GENERAL
1.1 SCOPE
1.2 GENERAL
1.3 INTERPRETATION
1.4 DEFINITIONS
SECTION 2 – INSPECTION AND TESTS
2 GENERAL
2.1 FREQUENCY OF INSPECTION AND TESTS
2.2 PERSONNEL
2.3 INSPECTION AND TESTING
2.4 ACTION RESULTING FROM INSPECTION AND TESTING
2.5 DOCUMENTATION
APPENDICES
APPENDIX A - BACKGROUND
A1 GENERAL
A2 PRINCIPLES OF CONSTRUCTION OF ELECTRICAL EQUIPMENT
A3 FUNCTIONAL EARTHING (FE)
A4 PROTECTIVE EARTHING
A5 INSULATION RESISTANCE
A6 TEST EQUIPMENT
A7 DOCUMENTATION
APPENDIX B - GUIDELINES ON THE ELECTRICAL KNOWLEDGEOF A COMPETENT PERSON
B1 GENERAL
APPENDIX C - POLARITY FOR CORD SETS ANDCORD EXTENSION SETS
C1
C2
C3
C4
APPENDIX D - TEST OF EARTHING CONTINUITY
D1 GENERAL
D2 INSTRUMENTATION
D3 TEST CONDITIONS
APPENDIX E - INSULATION TESTING
E1 GENERAL
E2 INSTRUMENTATION AND METHOD
E3 TEST CONDITIONS
APPENDIX F - INSULATION RESISTANCE TESTING OF PORTABLEISOLATING TRANSFORMERS
F1 GENERAL
F2 INSTRUMENTATION
F3 TEST CONDITIONS
APPENDIX G - INSULATION RESISTANCE TESTING OF A POWER SUPPLY
G1 GENERAL
G2 INSTRUMENTATION
G3 TEST CONDITIONS
APPENDIX H - TEST FOR THE OPERATING TIMEOF RESIDUAL CURRENT DEVICES (RCDS)
H1 GENERAL
H2 INSTRUMENTATION
H3 TEST CONDITIONS
APPENDIX J - ARC WELDERS
J1 GENERAL
J2 MACHINE CONSTRUCTION
J3 OPERATIONAL RISKS
APPENDIX K - REGULATORY APPLICATION OF THIS STANDARD
K1 GENERAL
K2 REGULATORY AUTHORITIES
TABLES
TABLE 1 – Leakage current limits
TABLE 2 – Insulation resistance limits
TABLE 3 – Maximum tripping times
TABLE 4 – Indicative testing and inspection intervals for electrical equipment
TABLE C1 – Conductor colours for flexible cords
TABLE C2 – Colour schemes of conductor insulation in modern sheathed flexible cords
TABLE H1 – Tripping time accuracy
FIGURES
Figure 4.5 from AS/NZS 3000 showing equipment connected to the installation wiringby equipment wiring
FIGURE C1 – Cord set
FIGURE C2 – Cord extension set
FIGURE D1 – Measurement of the earth continuity resistancebetween accessible earthed metal parts and the earth pin of the mains plug
FIGURE D2 – Measurement of the earth continuity resistancebetween the mains plug earth pin and the earthing aperture contacts of an EPOD
FIGURE E1 – Leakage current test setup using differential test methodfor Class II three-phase equipment
FIGURE E2 – Leakage current test setup using differential test methodfor Class II single-phase equipment
FIGURE E3 – Measurement of the insulation resistance between live supply conductorsand accessible earthed parts of typical Class I equipment
FIGURE E4 – Measurement of the insulation resistance between live supply conductorsand accessible metal parts of a typical Class II equipment
FIGURE E5 – Measurement of the insulation resistance of an EPOD
FIGURE F1 – Measurement of the insulation resistance between live supply conductorsto a portable isolating transformer and accessible earthed parts for Class Iisolating transformers or accessible metal parts for Class II isolating transformers
FIGURE F2 – Measurement of the insulation resistance between live supply conductorsand the portable isolating transformer output (secondary) winding
FIGURE F3 – Measurement of the insulation resistance betweena portable isolating transformer (secondary) winding and accessible earthed partsfor Class I isolating transformers
FIGURE G1 – Measurement of the insulation resistance of a power supply
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References
In-service safety inspection and testing - Repaired electrical equipment
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AS/NZS 3760:2010
KEEPING STANDARDS UP TO DATE
Copyright
CONTENTS
REFERENCED DOCUMENTS
FOREWORD
OUTCOME STATEMENT
SECTION 1 – SCOPE AND GENERAL
1.1 SCOPE
1.2 GENERAL
1.3 INTERPRETATION
1.4 DEFINITIONS
SECTION 2 – INSPECTION AND TESTS
2 GENERAL
2.1 FREQUENCY OF INSPECTION AND TESTS
2.2 PERSONNEL
2.3 INSPECTION AND TESTING
2.4 ACTION RESULTING FROM INSPECTION AND TESTING
2.5 DOCUMENTATION
APPENDICES
APPENDIX A - BACKGROUND
A1 GENERAL
A2 PRINCIPLES OF CONSTRUCTION OF ELECTRICAL EQUIPMENT
A3 FUNCTIONAL EARTHING (FE)
A4 PROTECTIVE EARTHING
A5 INSULATION RESISTANCE
A6 TEST EQUIPMENT
A7 DOCUMENTATION
APPENDIX B - GUIDELINES ON THE ELECTRICAL KNOWLEDGEOF A COMPETENT PERSON
B1 GENERAL
APPENDIX C - POLARITY FOR CORD SETS ANDCORD EXTENSION SETS
C1
C2
C3
C4
APPENDIX D - TEST OF EARTHING CONTINUITY
D1 GENERAL
D2 INSTRUMENTATION
D3 TEST CONDITIONS
APPENDIX E - INSULATION TESTING
E1 GENERAL
E2 INSTRUMENTATION AND METHOD
E3 TEST CONDITIONS
APPENDIX F - INSULATION RESISTANCE TESTING OF PORTABLEISOLATING TRANSFORMERS
F1 GENERAL
F2 INSTRUMENTATION
F3 TEST CONDITIONS
APPENDIX G - INSULATION RESISTANCE TESTING OF A POWER SUPPLY
G1 GENERAL
G2 INSTRUMENTATION
G3 TEST CONDITIONS
APPENDIX H - TEST FOR THE OPERATING TIMEOF RESIDUAL CURRENT DEVICES (RCDS)
H1 GENERAL
H2 INSTRUMENTATION
H3 TEST CONDITIONS
APPENDIX J - ARC WELDERS
J1 GENERAL
J2 MACHINE CONSTRUCTION
J3 OPERATIONAL RISKS
APPENDIX K - REGULATORY APPLICATION OF THIS STANDARD
K1 GENERAL
K2 REGULATORY AUTHORITIES
TABLES
TABLE 1 – Leakage current limits
TABLE 2 – Insulation resistance limits
TABLE 3 – Maximum tripping times
TABLE 4 – Indicative testing and inspection intervals for electrical equipment
TABLE C1 – Conductor colours for flexible cords
TABLE C2 – Colour schemes of conductor insulation in modern sheathed flexible cords
TABLE H1 – Tripping time accuracy
FIGURES
Figure 4.5 from AS/NZS 3000 showing equipment connected to the installation wiringby equipment wiring
FIGURE C1 – Cord set
FIGURE C2 – Cord extension set
FIGURE D1 – Measurement of the earth continuity resistancebetween accessible earthed metal parts and the earth pin of the mains plug
FIGURE D2 – Measurement of the earth continuity resistancebetween the mains plug earth pin and the earthing aperture contacts of an EPOD
FIGURE E1 – Leakage current test setup using differential test methodfor Class II three-phase equipment
FIGURE E2 – Leakage current test setup using differential test methodfor Class II single-phase equipment
FIGURE E3 – Measurement of the insulation resistance between live supply conductorsand accessible earthed parts of typical Class I equipment
FIGURE E4 – Measurement of the insulation resistance between live supply conductorsand accessible metal parts of a typical Class II equipment
FIGURE E5 – Measurement of the insulation resistance of an EPOD
FIGURE F1 – Measurement of the insulation resistance between live supply conductorsto a portable isolating transformer and accessible earthed parts for Class Iisolating transformers or accessible metal parts for Class II isolating transformers
FIGURE F2 – Measurement of the insulation resistance between live supply conductorsand the portable isolating transformer output (secondary) winding
FIGURE F3 – Measurement of the insulation resistance betweena portable isolating transformer (secondary) winding and accessible earthed partsfor Class I isolating transformers
FIGURE G1 – Measurement of the insulation resistance of a power supply
Previous versions
AS/NZS 3760:2010
Online Library subscription pricing
The cost of your subscription will depend on which standards you want to access, and how many people in your organisation need to be able to access the Online Library subscription at the same time (concurrent users). During your subscription period, we are also able to make any necessary changes and ensure you are aware of any pricing changes that result. For a quote, contact our Online Library team by emailing onlinelibrary@standards.govt.nz.