Standards
These are the documents the calculators cite. Each document has a page of its own. Each note on it says what the tool reads from the clause or the table. No text of a standard is reproduced here. AmpSize is a design aid. Verify results against the current standard.
392 entries in 24 documents. 150 tables: 143 verified, 6 derived, 1 unverifiable. Last check 15 Oct 2026.
For example: cl 3.6.2, table 8.1, app p, 3008 table 13, earthing.
AS/NZS 3000:2018
125 clauses and 51 tables · Tables 48 verified, 2 derived, 1 unverifiable · Checked 15 Oct 2026
The wiring rules. AmpSize uses this standard for the checks a circuit has to pass. They cover the current the cable must carry, the voltage drop limit, loop impedance, and maximum demand for the installation.
AS/NZS 3008.1.2:2017
6 clauses and 16 tables · Tables 16 verified · Checked 26 Sept 2026
The cable selection standard for New Zealand. AmpSize uses it for conductor data: current ratings, resistance and reactance, the derating factors for the route, and the short-circuit k factor.
AS/NZS 3008.1.1:2017
16 tables · Tables 16 verified · Checked 26 Sept 2026
The cable selection standard for Australia, superseded by the 2025 edition; selectable for older designs. A cable tool reads it when the Standard is AU and the Edition is 2017. A link or save with no edition reads it too. It supplies current ratings, resistance and reactance, the derating factors for the route, and the short-circuit k factor.
AS/NZS 3008.1.1:2025
3 clauses and 22 tables · Tables 22 verified · Checked 27 Sept 2026
The cable selection standard for Australia, 2025 edition. New AU work in a cable tool starts on it. It supplies current ratings, resistance and reactance, the correction factors for the route, and K. The DC cable size tool reads its d.c. ratings and d.c. voltage drop.
AS/NZS 4777.1:2016
1 clause
The grid connection standard for inverter energy systems. AmpSize uses it for the voltage rise limit on the cable between an inverter and the supply point.
IEC 60255-151:2009 / IEEE C37.112-2018
1 clause and 1 table · Tables 1 verified · Checked 26 Sept 2026
The two standards that define inverse-time overcurrent characteristics. AmpSize uses them to plot relay trip curves and to measure the grading margin between relays.
IEEE 1584-2018
1 clause and 5 tables · Tables 5 verified · Checked 1 Oct 2026
The arc flash hazard calculation guide, 2018 edition. The arc flash tool uses its model by default for incident energy, the boundary and a PPE category. Its tables are verified against the printed pages.
IEEE 1584-2002
1 clause and 1 table · Tables 1 derived · Checked 1 Oct 2026
The superseded 2002 edition of the arc flash guide. The arc flash tool keeps its model as a choice for older studies. A link or save with no model reads it, so no saved result changes.
Electricity (Safety) Regulations 2010
8 clauses and 4 tables · Tables 4 verified · Checked 26 Sept 2026
The New Zealand regulations that sit above the wiring rules. AmpSize uses the demand thresholds and the certificate and record periods they carry, to show which work pathway an installation takes and which certificate the work needs. A project test sheet reads the checks before connection (reg 73A). Note: the EWRB verification form cites AS/NZS 3019:2007, but Schedule 2 cites AS/NZS 3019:2022.
HELUKABEL and LAPP catalogues 2024
2 tables · Tables 1 verified, 1 derived · Checked 1 Oct 2026
Cable maker catalogues. AmpSize uses them for screen constructions, for cable properties that no standard tabulates, and for the clearance between power and data cables. They are manufacturer data, not a standard, and every result that reads them says so.
Industrial communications sources 2019-2024
1 table · Tables 1 derived · Checked 1 Oct 2026
Cable maker booklets and manuals, and a continuing-education course. AmpSize uses them for interface length limits, screen requirements and cable constructions, because it holds no printed communications standard. Every result that reads them says so.
AS/NZS 3760:2022
5 clauses and 3 tables · Tables 3 verified · Checked 1 Oct 2026
The standard for testing and inspecting electrical equipment in service, read in its printing with Amendment 1. AmpSize uses it for the retest interval of each environment, and for the pass limit of each in-service test. Against the 2010 edition the limits and intervals hold. The external timing limit for a permanently wired 30 mA RCD rose from 150 ms to 300 ms. The conductor colours tool reads its flexible cord colours, current and superseded.
NZS 4512:2010
15 clauses and 5 tables · Tables 5 verified · Checked 26 Sept 2026
The New Zealand standard for fire alarm and detection systems. AmpSize uses it for the sound pressure level an audible alerting device must reach. AmpSize reads that level for a room, a bedhead and a balcony. It also reads the ambient level that calls for a visual alerting device.
AS/NZS 3012:2019
11 clauses and 4 tables · Tables 4 verified · Checked 1 Oct 2026
AmpSize reads this standard for electrical work on a construction site or a demolition site. It covers the supply arrangements allowed there, the RCD protection and the periodic verification intervals. It also covers how long a site cord or cable may run. That run counts the lead of a plug-in, portable socket-outlet assembly, 2 m at most. Every value AmpSize takes from it was read from the rendered pages of the 2019 edition incorporating Amendment 1. Against the 2010 edition AmpSize read before, the figures hold; Table 3 becomes Table 6, Table 2 becomes Table 7, Section 3 renumbers, and a New Zealand only exception joins Cl 2.4.6.1.
AS/NZS 3002:2021
11 clauses and 1 table · Tables 1 verified · Checked 1 Oct 2026
The standard for electrical installations at events, shows and carnivals. AmpSize holds printed pages 1 to 21 of the 84 page standard. So it uses only the supply, RCD, underground, aerial and enclosure figures of Sections 2 and 3.
AS/NZS 1680.1:2006
2 tables · Tables 1 verified, 1 derived · Checked 1 Oct 2026
The general principles for interior and workplace lighting. The lighting lumen method tool reads its illuminance classes and its working plane heights. Table 3.1 is verified against the printed page. Table 3.2 stays derived: its adjacent-space ratio prints ambiguously and waits on a second printed source.
AS/NZS 1158.1.2:2010
1 table · Tables 1 verified · Checked 1 Oct 2026
The guide to the design of road lighting. The lighting lumen method tool reads its typical luminaire maintenance factors only. A second read of the printed page verified all thirty factors.
AS/NZS 4282:2023
5 clauses and 4 tables · Tables 4 verified · Checked 1 Oct 2026
The standard for the obtrusive effects of outdoor lighting. The obtrusive light tool reads its environmental zones and its limits for light at a neighbour’s window and for upward light. Its four tables are verified: two independent reads of the printed pages match every value.
AS/NZS 5033:2021
20 clauses and 5 tables · Tables 5 verified · Checked 2 Oct 2026
The standard for installing PV arrays. The PV string tool reads its voltage correction, its voltage limits and its string current figures. The PV array tool reads its isolator, enclosure and earthing figures and its earth fault interrupter table. All are verified on the printed pages.
AS/NZS 4777.2:2020
1 clause
The standard for grid-connected inverters. The PV string tool reads only the ratings an inverter is marked with.
AS/NZS 5139:2019
14 clauses and 3 tables · Tables 3 verified · Checked 2 Oct 2026
The standard for installing battery systems with power conversion equipment. The home battery tool reads its Section 4 location rules for an all-in-one home battery. The battery location check measures a site against each of them. Amendment 1 (2025) is not held, so check it for changes.
AS/NZS 3017:2022
12 clauses and 1 table · Tables 1 verified · Checked 1 Oct 2026
The guide to verifying an installation by inspection and testing. The test results tool cites it beside AS/NZS 3000 Section 8 where its figures match. Its loop impedance table is rounded, so Section 8 stays the reference for Zs. The test schedule tool reads its sequence of tests, and its RCD result for an Australian sheet.
AS 60529:2004
2 clauses and 1 table · Tables 1 verified · Checked 1 Oct 2026
AmpSize cites this document in its results.
Nexans Olex The Handbook:2017
1 table · Tables 1 verified · Checked 1 Oct 2026
AmpSize cites this document in its results.
Standards compared
- AS/NZS 3008.1.1 vs 3008.1.2: AU and NZ conditionsThe AU part of AS/NZS 3008.1 rates cable at 40 °C air and the NZ part at 30 °C. One 32 A circuit needs 6 mm² in Australia and 4 mm² in New Zealand.
- AS/NZS 3008 vs BS 7671: cable sizing comparedHow BS 7671 and AS/NZS 3000 with AS/NZS 3008.1 size a cable, where they differ, and why a BS current rating never converts into an AS/NZS one.
- IEC 60364 and the Wiring RulesIEC 60364 is the international series that AS/NZS 3000 stays aligned with. See how its parts are numbered, what TN-C-S, TT and IT mean, and where MEN fits.
- AWG and the NEC for NZ and AU electriciansAWG sizes and the NEC set against AS/NZS 3000 and 3008.1. A gauge converts to mm², but its rating does not, and the NEC 3 % drop figure is only a note.
- GlossaryThe terms the calculators and the guides use, each in two short sentences.
The ideas behind these clauses
- Construction site supplies: AS/NZS 3012What AS/NZS 3012:2019 asks of the electrical supply on a construction or demolition site, from the supply and the RCDs to cords, generators and testing.
- Correction factors in the 2017 and 2025 editionsWhat each AS/NZS 3008 correction factor does, how the factors multiply, and which values changed when AS/NZS 3008.1.1:2025 replaced the 2017 tables.
- Who may do electrical work in NZThe regulations that govern prescribed electrical work and its certification in New Zealand, named by number, with the paperwork abbreviations explained.
- PV array isolators and earthingHow parallel strings feed a fault, what Ithe, Ie and make and break mean for a d.c. isolator, and how AS/NZS 5033 earths and alarms a PV array.
Worked examples that cite them
- Builder's pole: supply, RCDs and cord lengthsA builder's pole for a house build, worked to AS/NZS 3012:2019. The supply it may take, the 30 mA RCDs, the Table 1 cord lengths and the test intervals.
- Three circuits in a hot ceiling: correction factorThree 32 A circuits in conduit across a 40 °C and a 50 °C ceiling space, worked with the NZ 2017 tables and again with AS/NZS 3008.1.1:2025.
- AS/NZS 3008.1.2 Tables 22 to 29: deratingWhat the derating tables govern, how ambient and grouping combine into one factor, and a 63 A feeder whose capacity falls to 78.85 A on 35 mm² copper.
- Arc flash at a 48 V home batteryClass a 48 V lithium home battery with 6 kA at its terminals by AS/NZS 5139, find its arc flash energy and PPE level, then bring it down with fuses.