AS/NZS 5112:2015
Tunnel type terminal neutral bars for low voltage switchboards - Requirements for termination of copper conductors up to 50 mm2
Provides requirements and methods of test for neutral links with tunnel terminals for the connection of copper conductors and in particular the requirements for brass neutral links with ratings up to and including 125 A.
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PREFACE
CONTENTS
1 SCOPE
2 NORMATIVE REFERENCES
3 TERMS AND DEFINITIONS
3.1 Conductor, prepared
3.2 Conductor, unprepared
3.3 Main earthing conductor
3.4 Main neutral conductor
3.5 Maximum connecting capacity
3.6 Multiple earthed neutral (MEN) connection
3.7 MEN system
3.8 Screw-type terminal
3.9 Tunnel terminal
4 COMPLIANCE WITH AS/NZS 3100
5 MARKING
5.1 Required marking
5.2 Location of marking
5.3 Method of marking
5.4 Manufacturer's instructions and data
6 REQUIREMENTS
6.1 General
6.2 Range of conductors and connection requirements
6.2.1 Range of conductors to be connected
6.2.2 Maximum connecting capacity
6.2.3 Separate terminals for individual conductors
6.2.4 Tunnel terminal types
6.3 Material for bar
6.4 Material for screws and type of threads
6.5 Characteristics of screws
6.5.1 Shape of screw ends
6.5.2 Tunnel entries
6.5.3 Diameter of single screws in direct contact with a conductor
6.5.4 Screws for tunnel terminals and saddle terminals
6.6 Mechanical characteristics of screws and bars
6.6.1 General
6.6.2 Undue damage to screws and the bar
6.6.3 Length of screws
6.7 Mechanical requirements for clamping
6.7.1 Distance from the edge of a single screw to the end of a blind hole
6.7.2 Escape of strands, severed strands and undue damage
6.8 Clamping of conductors
6.9 Temperature rise at rated current
6.10 Resistance of insulating materials to abnormal heat and fire
7 TESTS
7.1 General
7.2 Number of samples
7.3 Range of conductors and connection requirements
7.3.1 Range of conductors to be connected
7.3.2 Maximum connecting capacity
7.3.3 Separate terminals for individual conductors
7.3.4 Tunnel terminal types
7.4 Material for bars
7.5 Material for screws and type of threads
7.6 Characteristics of screws and tunnels
7.6.1 Shape of screw ends
7.6.2 Tunnel entries
7.6.3 Diameter of single screws in direct contact with a conductor
7.6.4 Screws for tunnel terminals and saddle terminals
7.7 Mechanical characteristics of screws and bars
7.7.1 Test
7.7.2 Undue damage to screws and the brass bar
7.7.3 Length of screws
7.8 Mechanical requirements for clamping
7.8.1 Distance from the edge of a single screw to the end of a blind hole
7.8.2 Escape of strands, severed strands and undue damage
7.9 Clamping of conductors
7.10 Temperature rise at rated current
APPENDIX A - RATED CURRENT OF NEUTRAL BARS WHEN MOUNTED INSIDE SWITCHBOARD ENCLOSURES
A1 RATED CURRENT VALIDITY WHEN USED IN A SWITCHBOARD
A2 TEST TEMPERATURE RISE VALUE
A3 COMPARISON OF TEMPERATURE RISE TO THIS STANDARD AND THE TEMPERATURE RISE IN SWITCHBOARDS
APPENDIX B - EXAMPLES OF TUNNEL TERMINAL BARS
B1 GENERAL
B2 TWO SCREWS PER TUNNEL-EXAMPLE 1
B2.1 General
B2.2 Screw diameter/tunnel ratio
B2.3 Screw end shape
B2.4 Screw length
B3 TWO SCREWS PER TUNNEL-EXAMPLE 2
B3.1 General
B3.2 Screw diameter/tunnel ratio
B3.3 Screw end shape
B3.4 Screw length
B4 ONE SCREW PER TUNNEL-EXAMPLE 1
B4.1 General
B4.2 Screw diameter/tunnel ratio
B4.3 Screw end shape
B4.4 Screw length
B5 ONE SCREW PER TUNNEL-EXAMPLE 2
B5.1 General
B5.2 Screw diameter/tunnel ratio
B5.3 Screw end shape
B5.4 Screw length
B6 ONE SCREW PER TUNNEL-EXAMPLE 3
B6.1 General
B6.2 Screw diameter/tunnel ratio
B6.3 Screw end shape
B6.4 Screw length
B7 SHAPE OF SCREW ENDS
B7.1 General
B7.2 Screws with sharp protruding rings on the ends
B8 SADDLE TERMINAL
B8.1 General
B8.2 Screws
BIBLIOGRAPHY
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References
Copper and copper alloys - Wrought rods, bars and sections
Approval and test specification - General requirements for electrical equipment
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PREFACE
CONTENTS
1 SCOPE
2 NORMATIVE REFERENCES
3 TERMS AND DEFINITIONS
3.1 Conductor, prepared
3.2 Conductor, unprepared
3.3 Main earthing conductor
3.4 Main neutral conductor
3.5 Maximum connecting capacity
3.6 Multiple earthed neutral (MEN) connection
3.7 MEN system
3.8 Screw-type terminal
3.9 Tunnel terminal
4 COMPLIANCE WITH AS/NZS 3100
5 MARKING
5.1 Required marking
5.2 Location of marking
5.3 Method of marking
5.4 Manufacturer's instructions and data
6 REQUIREMENTS
6.1 General
6.2 Range of conductors and connection requirements
6.2.1 Range of conductors to be connected
6.2.2 Maximum connecting capacity
6.2.3 Separate terminals for individual conductors
6.2.4 Tunnel terminal types
6.3 Material for bar
6.4 Material for screws and type of threads
6.5 Characteristics of screws
6.5.1 Shape of screw ends
6.5.2 Tunnel entries
6.5.3 Diameter of single screws in direct contact with a conductor
6.5.4 Screws for tunnel terminals and saddle terminals
6.6 Mechanical characteristics of screws and bars
6.6.1 General
6.6.2 Undue damage to screws and the bar
6.6.3 Length of screws
6.7 Mechanical requirements for clamping
6.7.1 Distance from the edge of a single screw to the end of a blind hole
6.7.2 Escape of strands, severed strands and undue damage
6.8 Clamping of conductors
6.9 Temperature rise at rated current
6.10 Resistance of insulating materials to abnormal heat and fire
7 TESTS
7.1 General
7.2 Number of samples
7.3 Range of conductors and connection requirements
7.3.1 Range of conductors to be connected
7.3.2 Maximum connecting capacity
7.3.3 Separate terminals for individual conductors
7.3.4 Tunnel terminal types
7.4 Material for bars
7.5 Material for screws and type of threads
7.6 Characteristics of screws and tunnels
7.6.1 Shape of screw ends
7.6.2 Tunnel entries
7.6.3 Diameter of single screws in direct contact with a conductor
7.6.4 Screws for tunnel terminals and saddle terminals
7.7 Mechanical characteristics of screws and bars
7.7.1 Test
7.7.2 Undue damage to screws and the brass bar
7.7.3 Length of screws
7.8 Mechanical requirements for clamping
7.8.1 Distance from the edge of a single screw to the end of a blind hole
7.8.2 Escape of strands, severed strands and undue damage
7.9 Clamping of conductors
7.10 Temperature rise at rated current
APPENDIX A - RATED CURRENT OF NEUTRAL BARS WHEN MOUNTED INSIDE SWITCHBOARD ENCLOSURES
A1 RATED CURRENT VALIDITY WHEN USED IN A SWITCHBOARD
A2 TEST TEMPERATURE RISE VALUE
A3 COMPARISON OF TEMPERATURE RISE TO THIS STANDARD AND THE TEMPERATURE RISE IN SWITCHBOARDS
APPENDIX B - EXAMPLES OF TUNNEL TERMINAL BARS
B1 GENERAL
B2 TWO SCREWS PER TUNNEL-EXAMPLE 1
B2.1 General
B2.2 Screw diameter/tunnel ratio
B2.3 Screw end shape
B2.4 Screw length
B3 TWO SCREWS PER TUNNEL-EXAMPLE 2
B3.1 General
B3.2 Screw diameter/tunnel ratio
B3.3 Screw end shape
B3.4 Screw length
B4 ONE SCREW PER TUNNEL-EXAMPLE 1
B4.1 General
B4.2 Screw diameter/tunnel ratio
B4.3 Screw end shape
B4.4 Screw length
B5 ONE SCREW PER TUNNEL-EXAMPLE 2
B5.1 General
B5.2 Screw diameter/tunnel ratio
B5.3 Screw end shape
B5.4 Screw length
B6 ONE SCREW PER TUNNEL-EXAMPLE 3
B6.1 General
B6.2 Screw diameter/tunnel ratio
B6.3 Screw end shape
B6.4 Screw length
B7 SHAPE OF SCREW ENDS
B7.1 General
B7.2 Screws with sharp protruding rings on the ends
B8 SADDLE TERMINAL
B8.1 General
B8.2 Screws
BIBLIOGRAPHY
AS/NZS 5112:2015
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.