AS/NZS 3008.1.1:2017 pdf free.Electrical installations – Selection of cables – Part1.1:Cables for alternating voltages up to and including 0.6/1 kV – Typical Australian installation conditions.
This Standard sets out a method for cable selection for those types of electrical cables and methods of installation that are in common use at working voltages up to and including 0.6/1 kV at 50 Hz a.c.
NOTL: Although the Standard specifically applies to a.c. installations, it may also be applied to
Four criteria arc given for cable selection, as follows:
(a) Current-carrying capacity.
(b) Voltage drop.
(c) Short-circuit temperature rise.
(d) Economic optimization.
This Standard provides sustained current-carrying capacities and voltage drop values for those types of electrical cable and installation practices in common use in Australia. A significant amount of explanatory material is also provided on the application of rating factors that arise from the particular installation conditions of a single circuit or groups of circuits. Also, provided in Section 5 is information on cable selection based on short-circuit temperature limits.
NOTh: A number of worked examples on cable selection are included in Appendix A.
This Standard does not take into account the effects that may occur owing to temperature rise at the terminals of equipment and reference is necessary to AS/NZS 3000 and the individual equipment Standards.
NOTE: For ease of reference, an index of the Tables included in this Standard is provided in Appendix 13.
This Standard is intended to apply to installations made or carried out after the date of publication, but it is recommended that it not be applied on a mandatory basis until 6 months after the date of publication. However, if work on an installation commenced before publication of this edition, the inspecting authority may grant permission for the installation to be carried out in accordance with the superseded edition.
1.3 ALTERNATIVE SPECIFICATIONS
AS/NZS 3000 gives current-carrying capacities for a limited number of cable installation conditions. These conditions are included in this Standard but, in some cases, where recalculations have been performed, the tabulated values differ slightly between the Standards. Where this occurs the current-carrying capacity given in this Standard is considered to be more accurate, but either value is acceptable for the application of any appropriate requirements of AS/NZS 3000, e.g. maximum current rating of a circuit-protective device.
Where the type of cable or method of installation is not specifically covered in the tables of this Standard. current-carrying capacities obtained from alternative specifications such as ERA Report 69-30 may be employed.
ERA Report 69-30, particularly Part III, gives information on the following areas that are not covered by this Standard:
(a) The d.c. current-carrying capacities of two single-core cables and one two-core cable.
(b) The current-carrying capacity of armoured single-core cables.
(c) Group rating factors for underground cables laid in tier formation.