AS/NZS 3000:2018

The loop impedance tool follows this note. Conductor resistance rises with temperature, so a design value taken at the operating temperature is higher than a value measured cold. The tool says which basis it used.

The floor area demand tool works to this paragraph. It multiplies each area by its Table C3 figure and turns the total kVA into a current.

The circuit loading tool works to this paragraph. It adds the tabulated contribution of each point and the assessed cooking demand. Then it compares the sum with the circuit-breaker rating.

The total voltage drop tool works each part of the run as a percent of its own circuit voltage, then adds the percents. A single-phase final adds to three-phase mains this way.

The conduit fill tool uses this clause. It sums the area of each cable in the bundle and compares the total with the space inside the conduit. The result is a fill percent and the limit for that cable count.

Appendix K is informative, so the tool prints this form list as an example and not as a figure to meet. The switchboard form tool reads the accepted forms and the accepted suffixes here rather than from Note 1 to Cl 2.5.5.2, because the printed note omits one suffix on one form while this paragraph states one rule for all three forms. The table file records the argument.

Appendix K is informative. This paragraph gives its figures as a worked example against AS/NZS 61439.1, so the tool marks them as examples. The switchboard form tool reads the overvoltage category, the clearance and the alternative test voltage. It reads them for the impulse withstand rating (Uimp) you enter. The two Uimp cases give different figures, so every output from this paragraph names its Uimp.

Appendix K is informative and this paragraph gives its figure as a worked example against AS/NZS 61439.1, so the tool marks it as an example. The switchboard form tool reads the creepage distance here. It holds only at the insulation voltage, the pollution degree and the material group the paragraph names, so the tool prints all three beside it.

Appendix K is informative, so this table is a summary, not a mandatory part of AS/NZS 3000. The switchboard form tool points at it for what each form of separation actually separates. The standard sources the table from AS/NZS 61439.2. The tool does not read the cells; it reads the accepted form list from Paragraph K6.2.

The EV charger tool counts every charger at its rated current, all at once. Appendix P is informative.

For Australia, the EV charger tool reads the device type here. A Mode 3 or Mode 4 outlet adds the d.c. measures, unless the station has them.

The outbuilding earthing tool uses this definition to name the building it checks. It reports whether the outbuilding has its own earthing arrangement.

The maximum demand tool works to this clause. It adds the demand of each load group to get one current for the installation. That current sizes the main switch and consumer mains.

The EV charger tool reads Appendix P for Australia, as this clause points. For New Zealand it reads Clause 7.9.

The spare capacity tool takes the highest demand recorded over 30 minutes on each phase. Where a calculated demand is entered too, it takes the larger.

The spare capacity tool takes one circuit-breaker setting, or the sum of the settings a mains or submain feeds, as the demand on each phase.

The imperial cable tool gives a second rating for a rewireable fuse or a plug-in circuit-breaker already in place. It points you to this clause before you plan a new device.

The cable size tool uses this clause to compare the cable with its protective device. The device rating must sit at or below the derated capacity of the cable. A size that the device cannot protect is rejected. The circuit check tests Ib ≤ In ≤ Iz on an installed circuit.

The switchboard form tool reads this clause as Amendment 3 left it. It compares the rating you enter per phase with the 800 A trigger of Cl 2.5.5.1. It then says whether the clause applies. Over the trigger it warns that Cl 2.5.5.1 also covers the incoming supply conductors, on every route. Cl 2.5.5.1 then offers three routes: Cl 2.5.5.2, Cl 2.5.5.3, or both together. The tool holds the Cl 2.5.5.2 route only and says so in the result. It also covers a board with a safety services section. It points that board at item (d) of Cl 2.5.5.2 and at Cl 7.2.

The RCD leakage budget tool reads this clause and its Notes: the circuits are split so normal leakage is unlikely to trip the RCD, the leakage should stay within one-third of the rating, and an RCD may operate above half of it.

The RCD arrangement tool checks a board against this clause. Lighting circuits spread over the RCDs in any installation. In a residential installation, at most three final subcircuits on one RCD and at least two RCDs.

The RCD selection tool uses this clause for an Australian residential installation. It calls for 30 mA on every final subcircuit, at any rating. This clause and Cl 2.6.3.2.1 list exceptions, and the tool points at them in an info note.

The wet area zones tool notes the 30 mA RCD this clause asks on every AU domestic final subcircuit.

The RCD selection tool uses this clause for Australian circuits outside a residential installation. It calls for 30 mA on a final subcircuit rated at or below 32 A. That applies only where the circuit supplies socket-outlets, lighting, hand-held equipment or equipment with a higher shock risk.

The RCD selection tool uses this clause for New Zealand residential circuits. It calls for 30 mA on the final subcircuits that supply socket-outlets, lighting points or direct connected hand-held equipment. Cl 7.9.3.2 prints no device for a Mode 2 charging facility. So the RCD selection and EV charger tools both read the socket-outlet figure of this clause for it.

The wet area zones tool notes the 30 mA RCD this clause asks on NZ residential socket-outlet, lighting and hand-held circuits.

The RCD selection tool uses all four items of this clause, each through its own installation or circuit. Item (a) sets 30 mA on socket-outlets rated up to 30 A in teaching areas. Item (b) sets 10 mA on socket-outlets for young children. Item (c) sets 30 mA outdoors and in public, amusement and damp locations. Item (d) sets 30 mA on rides and vending machines.

The switchboard form tool reads this clause as Amendment 2 left it, in three subclauses. From Cl 2.10.2.2.1 it reads 1.0 m at every face that needs access and the 0.6 m unimpeded space. The exception to Cl 2.10.2.2.1(b)(i) lets a domestic installation use 0.6 m at the face of the board. That covers a private dwelling, or a board that serves one flat or living unit alone. The tool applies the 0.6 m to the front face, and other faces take the 1.0 m figure. Cl 1.4.54 makes the main board of a block of living units a multiple installation, which keeps 1.0 m. From Cl 2.10.2.2.2 it reads two exit paths set well apart and the doorway size. Those reach a board at or over 800 A per phase, or over 3 m long. They reach it only where you must enter a room to get to the board. The tool asks about the room and excepts no domestic case. It also names the replacement exception. For a board that is not domestic, it names the door rules of Cl 2.10.2.2.2 and Cl 2.10.2.2.3.

The circuit schedule tool reminds you to write the chart and labels in English. It sets no letter height or colour, because the clause sets none.

The circuit schedule tool lists each way of the board with the circuit it supplies. That list is the chart for the board.

The circuit schedule tool reminds you to identify the active, neutral and earth bars. It also asks you to mark or arrange the terminals by circuit.

The circuit schedule tool reminds you to mark the MEN connection and the main neutral terminals. It names the one arrangement that needs no mark.

The cable size tool works to this clause. It divides the design current by the derating factors for the route. The result is the current the cable must carry in the table, before any factor is applied. The correction factors tool prints that current on its own.

The minimum conductor size tool names this clause when you mark a circuit as a parallel group. It reports the size floor the clause sets and says that the clause carries further conditions the tool does not check.

The outbuilding earthing tool sizes the PEN of a submain to a separate MEN outbuilding: at least the neutral the circuit needs, and at least the earthing conductor of Table 5.1.

The voltage drop tool uses this clause for the limit it tests against. The clause keeps the drop between the supply point and the load within a percent of the nominal voltage. The cable size tool applies the same limit to each candidate size, and the circuit check to the installed size. The total voltage drop tool adds the mains, submains and final subcircuit against it, and takes 7 % from a substation on the premises (Exception 3).

The conductor colours tool uses this clause for sleeving at a termination. It shows which colours sleeving may mark as active or neutral, and which it may never mark.

The conductor colours tool names this clause for an older installation. A bare or green earth from a previous edition may stay. New terminations on it take green/yellow sleeving.

The conductor colours tool names this clause for an older installation. A yellow live conductor from a previous edition may stay. New terminations on it take white sleeving.

The segregation tool reads the wiring system you choose against this clause. A common enclosure, duct or tray sets which arrangements apply.

The segregation tool reads this subclause when two installations or two occupancies share an enclosure that is not a pipe, tube, conduit or multi-core cable. It reports the 50 mm separation by distance and the switchboard exception.

The segregation tool tests a low voltage circuit beside an extra-low voltage circuit against this clause. It reports which arrangement permits the pair, or that none does.

The segregation tool takes the 25 mm clearance from this subclause. The clearance applies to gas or water pipes that run above ground. It also reports the two exceptions: a bonding conductor joined to the pipe, and heat trace cabling.

The underground cable tool works to this clause. It reports the bedding depth, the mechanical protection rule for a Category B system and the depth at which marker tape is laid above the wiring system.

The underground cable tool reports the bedding below and the cover above the wiring system from this clause.

The underground cable tool reports the extra mechanical protection a Category B system needs. It gives the height above the wiring, the width and the overlap.

The underground cable tool reports the depth at which marker tape goes above the wiring system.

The underground cable tool uses this clause for the general spacing from any other underground service, and for the service specific separations it reads from the table.

The aerial clearance tool names this clause beside every clearance it reports. The tabulated figure is not the whole check, so the tool points you at this clause and at Note 1 to Table 3.8 rather than clearing a span on the table alone.

The accessory location tool notes that a socket-outlet within 75 mm of a floor takes its plug horizontally.

The downlight clearance tool says when the roof space needs the warning sign: unless every recessed luminaire in it is IC or IC-4.

The downlight clearance tool checks the class against this clause: which classes a home or other building may take in New Zealand and in Australia, and how a 2001 marking is read.

The accessory location tool checks the cooktop switch: near the appliance, not on it, and not reached across the cooking surface.

The accessory location tool checks a socket-outlet or switch against the prohibited location beside and above an open cooking surface.

The motor circuit tool rates the isolating switch at the full load current, able to break the locked-rotor current. Without the maker’s figure it takes eight times full load.

The motor circuit tool calls for overload protection above 370 W and gives the relay setting.

The motor circuit tool calls for overtemperature protection above 2250 W, or for an unattended motor above 240 VA. It leaves it off a fire-protection service, as Cl 4.13.3.2 says.

The power factor correction tool reminds you to switch each bank step with a device rated for capacitors.

The power factor correction tool sets the least current-carrying capacity of the bank conductors at 135 % of the bank current.

The power factor correction tool notes the discharge path and the warning notice each step needs.

The accessory location tool checks an ignition source against the hazardous area of an exchange or in-situ fill gas cylinder.

The accessory location tool fails an ignition source in an indoor gas cylinder compartment in New Zealand.

The accessory location tool checks an ignition source against the exclusion zone of a gas relief vent, scaled for a vent over 50 mm.

The accessory location tool checks the zone about a reticulated gas regulator in a New Zealand home.

The earthing tool works to this clause. It reads the tabulated size for the active conductor. It applies the main earthing conductor limits of 4 mm² and 120 mm². It can size by the adiabatic equation instead.

The earthing tool sizes the main earthing conductor from this clause. It applies the smallest and the largest size the clause allows.

The outbuilding earthing tool gives the driven depth of a rod, 1.8 m in New Zealand and 1.2 m in Australia, or the cover and length of a strip electrode.

The outbuilding earthing tool reports where the protective earthing conductor of the outbuilding connects. It names the main earth bar or the main earthing conductor.

The outbuilding earthing tool reads this clause. An individual outbuilding takes an earth with the submain or a separate MEN with its own electrode. A combined outbuilding takes the earth with the submain only.

The screen and drain earthing tool works to this clause. It gives the originating end as the place to earth a screen, armour or sheath that needs earthing. That end is where the cable leaves its switchboard or accessory. It also reports the two exceptions.

The screen and drain earthing tool uses this clause where a sheath touches a pipe carrying a flammable agent. It reports bonding first, and where bonding is impracticable it reports the rigid spacing in air, the insulating thickness and the overlap.

The wet area zones tool notes the bond from the floor and wall reinforcing to the earthing system.

The wet area zones tool notes the pool bond at 0.5 Ω or less.

The earthing tool reports the bonding conductor size from this clause: 4 mm² in general, and 6 mm² at a telecommunications terminal.

The wet area zones tool reads 4 mm² for the bonding conductor of a shower, bathroom or pool.

The RCD selection tool reports the longest disconnection time allowed for the circuit. It reports 0.4 s for socket-outlets up to 63 A and for hand-held equipment, and 5 s for other circuits.

The loop impedance tool works to this clause. It adds the supply impedance to the conductor resistance, active plus earth. The total must stay low enough that the protective device opens within the time the clause sets.

The wet area zones tool notes that room walls, doors, floors and ceilings limit the zones. It also notes the two cases outside a zone: a tool-access IPX4 panel, and a recessed fitting above the ceiling.

The wet area zones tool reads Zones 0 to 3 for a bath and a shower from this clause. It uses 2.25 m in NZ and 2.5 m in AU, and 0.6 m from a ceiling rose in AU. It models no barrier.

The wet area zones tool reads Zone 2 for a basin or sink here. It uses 0.15 m up to 40 L, and 0.5 m above 40 L or with a hose.

The wet area zones tool notes that obstacles and placing out of reach give no protection here.

The wet area zones tool reads the least IP rating per zone and Table 6.1 from this clause. It keeps the A1 communal IPX5 as history, because A2 removed it.

The wet area zones tool reads the pool zones at 2.0 m and a further 1.5 m. A spa up to 680 L takes the bath zones. A spa to 5000 L takes 1.25 m.

The wet area zones tool reads the 30 mA RCD for Class I equipment in the pool water here.

The wet area zones tool reads IPX8, IPX5 and IPX4 and Table 6.2 from this clause. It lists the socket-outlet conditions in Zone 1 and does not judge them.

The wet area zones tool reads Zone 1 at 2.0 m from the rim, to 2.5 m. It models no sculpture.

The wet area zones tool reads the 30 mA RCD, or an isolating transformer, for fountain equipment here.

The wet area zones tool reads IPX8 and IPX5 and Table 6.3 from this clause. It allows no socket-outlet in Zone 0 or Zone 1.

The wet area zones tool reads Zone 1 at 0.5 m from the heater. The rest of the room is Zone 2 to 1.0 m and Zone 3 above.

The wet area zones tool asks a 30 mA RCD for all sauna equipment but the heater.

The wet area zones tool reads IP24 or IPX4B for the whole sauna room. It allows no socket-outlet, and only the heater switches.

The wet area zones tool treats the whole refrigeration room as one location.

The wet area zones tool notes that obstacles and placing out of reach give no protection here.

The wet area zones tool reads IP24 or IPX4B here. It allows no switchboard in the room.

The wet area zones tool takes the whole space, the floor and walls to 2.0 m, or the floor to 1.0 m.

The wet area zones tool notes that obstacles and placing out of reach give no protection here.

The wet area zones tool reads IPX5 for low or medium pressure and IPX6 for high pressure. A switchboard needs IPX6.

The voltage drop tool reads the limit from this clause instead of Cl 3.6.2 once you set the system to extra-low voltage. Every step and warning that names a limit then cites Cl 7.5.7.

Clause 7.9 adds to Sections 2 to 7 and can change them. The EV charger tool names this clause on every result. A figure that Clause 7.9 does not print can still come from those Sections. Through this clause, the EV charger and RCD selection tools both report the 30 mA of Cl 2.6.3.3.1. They report it for a Mode 2 socket-outlet in a domestic installation.

The EV charger tool names this clause beside every result so you read it with the mode clause. It reports no figure from it.

The EV charger tool points you at this clause when you pick Mode 1. It reports no figure from it.

The RCD selection tool reads the capacity of a Mode 2 charging final subcircuit from this clause. It reads it for the Residential option, which on an electric vehicle circuit means a domestic installation. The clause states no rated residual current, and Cl 7.9.1 adds Cl 7.9 to Sections 2 to 7. So the tool reports the 30 mA of Cl 2.6.3.3.1 for that socket-outlet circuit. The clause applies in New Zealand only.

The EV charger tool reads the Mode 2 final subcircuit capacity and the mounting height from this clause. It also reads whether other points share that circuit. The tool does not report the socket-outlet standards the clause lists. The clause prints no residual current device figure. So for a domestic installation, the tool reports the 30 mA of Cl 2.6.3.3.1. Cl 7.9.1 keeps that figure in force.

The RCD selection tool reads this clause for a Mode 3 or Mode 4 circuit in a domestic installation. It reports the separate Type B device at 30 mA in every live conductor, and the single-phase circuit capacity. It also reports the alternative device the Exception names for Mode 3 only. A NOTE gives the 6 mA RDC-DD level of that device. The clause applies in New Zealand only.

For Mode 3 and Mode 4, the EV charger tool reads four figures from this clause. They are the capacity, the residual current device, the isolating switch rating and the mounting height. It also reads the alternative device of the Exception, and the RDC-DD level from the NOTE to that Exception. Item (a) prints its capacity figure for single-phase final subcircuits, and the tool carries that qualifier beside the figure. Item (c) sets a separate device in every live conductor. The tool carries both conditions beside the 30 mA Type B figure.

The EV charger tool names this NOTE above 20 A single-phase. A NOTE is not a requirement.

The EV charger tool reads this clause once you pick an installation that is not domestic. The clause prints a residual current device requirement and nothing else. So the tool reports no capacity, isolating switch or height figure for that installation. Its Exception names Mode 3, as the Clause 7.9.3.3 Exception does. The RCD selection tool reads it for an electric vehicle circuit outside a domestic installation. That includes a hotel or motel. There it reports a separate Type B device at 30 mA in every live conductor.

The test results tool works to this clause. It reports the acceptance limit for each test and compares the value you measured with that limit. It does not describe the test method; that is in AS/NZS 3017.

The test schedule tool gives the earth continuity limit for each circuit and for the main earth and bonding. It uses this clause for those limits.

The test results and test schedule tools use this clause for the insulation resistance limit and the test voltage. The tools test each circuit result against that limit.

The imperial cable tool does not size conductors in parallel. It points you to this paragraph and Table I2 for that case.

The aerial spans tool does not apply this table. It tells you to check the span against it and Cl 3.12.4 by hand.

For a New Zealand domestic installation, the EV charger tool counts the full connected load from this row.

The conduit fill tool uses the space factor method of Paragraph C6.2, not these tables. It names them, because they give a maximum cable count for a conduit instead.

The conduit fill tool reads the internal diameter of each nominal conduit size, for New Zealand or Australia. The two differ at 80 and 100 mm. The 16 mm size is a medium-duty conduit, and the tool says so.

Derived: derived from manufacturer data, pages Pipemakers 7-8, 10-12; Iplex 4, 6; Marley 16. Checked 1 Oct 2026.

The EV charger tool reads Appendix P for Australia: the demand of each charging point and the residual current device. Appendix P is informative, so the tool reports guidance.

Verified: read against the printed standard, pages 77, 570-571 (PDF 81, 574-575). Checked 1 Oct 2026.

The spare capacity tool reads the 30 minute measurement period and the two limitation methods here, and the rule that a measured demand above the calculated one is the maximum demand.

Verified: read against the printed standard, pages 77-78 (PDF 81-82). Checked 1 Oct 2026.

The circuit chart tool reads the marking duties of a board: MAIN SWITCH, MAIN SWITCHBOARD outside a single home, the source of an alternative supply, each device named for what it supplies, shared neutrals and fuses.

Verified: read against the printed standard, pages 85-87, 140, 146-148 (PDF 89-91, 144, 150-152). Checked 1 Oct 2026.

The file follows AS/NZS 3000:2018 with Amendments 1, 2 and 3. Its Cl 2.5.5 and Cl 2.10.2.2 figures are normative. The one exception is the 2.2 m doorway height, which a NOTE gives as advice. Everything from Appendix K is informative, and the tool prints it as an example. The switchboard form tool reads one rule row and one row per rated impulse withstand voltage. The rule row holds the 800 A separation trigger and the accepted forms and suffixes. It holds the face and surrounding clearances and the domestic figure. It holds the two-exit triggers, the clear-space exception and the 2.0 m by 0.9 m clear doorway. It holds the creepage distance and the three conditions that figure needs. Each impulse row holds the clearance, the alternative test voltage and the overvoltage category for its Uimp.

Verified: read against the printed standard, pages 108-110, 136-137, 545, 548-551. Checked 26 Sept 2026.

The RCD leakage budget tool reads the one-third budget and the 50 % point of Cl 2.6.2.1 Note 1, and the socket-outlet notes for 30 mA and NZ 10 mA RCDs.

Verified: read against the printed standard, pages 120, 123-130 (PDF = page + 4). Checked 1 Oct 2026.

The RCD arrangement tool reads the three rules of Cl 2.6.2.4: the lighting spread, at most three circuits on one residential RCD and at least two residential RCDs.

Verified: read against the printed standard, pages 123 (PDF 127). Checked 1 Oct 2026.

The RCD selection tool reads whether the clause calls for additional protection on the circuit. It also reads the residual current figure the clause sets, and the circuit or socket-outlet rating the clause stops at. For electric vehicle charging, it reads the device type and its conditions and the capacity. It also reads the clause each figure comes from. Mode 3 and Mode 4 are separate rows, because the Exception names Mode 3 only.

Verified: read against the printed standard, pages 124-129, 413-415. Checked 27 Sept 2026.

The total voltage drop tool reads the 5 % limit from the point of supply, the 7 % from a dedicated substation on the premises, and names the 11 % of a stand-alone system.

Verified: read against the printed standard, pages 162-163, 480 (PDF = page + 4). Checked 1 Oct 2026.

The segregation tool reads one row per case: what may share a pipe or cable, what needs segregation in a common enclosure, which voltage levels may mix, and the separation from gas, water and telecommunications services.

Verified: read against the printed standard, pages 181-184. Checked 27 Sept 2026.

The accessory location tool reads the floor, cooktop and gas distances: 75 mm, 150 mm and 2.5 m, the Figure 4.18 cylinder areas, the Figure 4.19 vent zones and the Figure 4.20 regulator zone.

Verified: read against the printed standard, pages 225, 243-245, 261-264 (PDF = page + 4). Checked 1 Oct 2026.

The downlight clearance tool reads whether insulation may abut or cover each class, the classes each installation may take, and the default clearances for a lamp up to 100 W.

Verified: read against the printed standard, pages 230-233, 237-242 (PDF = page + 4). Checked 1 Oct 2026.

The motor circuit tool reads the eight times locked-rotor figure, the 370 W overload threshold and the overtemperature thresholds here.

Verified: read against the printed standard, pages 253-255 (PDF 257-259). Checked 1 Oct 2026.

The outbuilding earthing tool reads which arrangements each outbuilding may take and the rules of a separate MEN installation.

Verified: read against the printed standard, pages 48, 160-162, 292-295 (PDF = page + 4). Checked 1 Oct 2026.

The screen and drain earthing tool reads the earthing point for each case, whether continuity is required, and the separation to use where a sheath may not be bonded to a pipe.

Verified: read against the printed standard, pages 177, 274, 295-296, 301, 306-307. Checked 27 Sept 2026.

The EV charger tool reads one row per charging mode. Each row gives the final subcircuit capacity, and whether other points share that circuit. It gives the residual current device and its alternative, and the RDC-DD detection level. It also gives the isolating switch rating and the mounting height. Clause 7.9.3.3 prints the Mode 3 and Mode 4 capacity for single-phase final subcircuits. The row carries that qualifier. A fifth row holds Clause 7.9.4, the clause for an installation that is not domestic. That row carries residual current device figures alone. A null means Clause 7.9 states no figure for that row. The RDC-DD level is the one figure from a NOTE rather than a clause body. The tool prints it as a note. Each device row also says whether the clause sets a separate device in every live conductor. Clause 7.9.3.2 prints no device for Mode 2. So for a domestic Mode 2 facility, the tool adds the 30 mA of Clause 2.6.3.3.1. It reads that figure from the RCD table. Clause 7.9 applies in New Zealand only.

Verified: read against the printed standard, pages 413-415. Checked 26 Sept 2026.

The IP rating tool reads the least code the wiring rules name outside the wet area zones: enclosures, outdoor accessories, switchboards near hosing or sprinklers, saunas, hosed areas and an outdoor EV point.

Verified: read against the printed standard, pages 57, 140-143, 213-215, 355-356, 361, 570 (PDF 61, 144-147, 217-219, 359-360, 365, 574). Checked 1 Oct 2026.

The wet area zones tool reads the Section 6 RCD rules, the 0.3 m floor rule and the 4 mm² bonding conductor here.

Verified: read against the printed standard, pages 124, 127, 307-308, 312, 320, 338-341, 349-352, 355, 358, 360-361 (PDF = page + 4). Checked 1 Oct 2026.

The wet area zones tool reads each zone reach and height here, for baths, showers, basins, spas, pools, fountains and saunas. Barrier reductions are not modelled.

Verified: read against the printed standard, pages 317-319, 337-338, 349, 354-355, 358, 360-361 (PDF 321-323, 341-342, 353, 358-359, 362, 364-365). Checked 1 Oct 2026.

The minimum conductor size tool reads the smallest conductor Table 3.3 allows for the circuit use, the wiring type and the conductor material. Exception 1 can allow a smaller socket-outlet conductor, and the tool points at it instead of applying it.

Verified: read against the printed standard, pages 158, 160. Checked 26 Sept 2026.

The conductor colours tool reads Table 3.4 with its notes: the earth, bonding and neutral colours, the recommended active colours, the New Zealand domestic black neutral, and the rules for older and sleeved conductors.

Verified: read against the printed standard, pages 168-169 (PDF 172-173). Checked 1 Oct 2026.

The tools read this data when they need it.

Verified: read against the printed standard, pages 195. Checked 26 Sept 2026.

The tools read this data when they need it.

Verified: read against the printed standard, pages 197. Checked 26 Sept 2026.

The tools read this data when they need it.

Verified: read against the printed standard, pages 203. Checked 26 Sept 2026.

The aerial spans tool reads the minimum clearance for each conductor type from Table 3.8. From Table 3.10 it reads the conductor spacing at the supports for a span. Table 3.10 stops at a 60 m span. The tool refuses a longer span rather than hold the 60 m figure.

Verified: read against the printed standard, pages 206, 208. Checked 26 Sept 2026.

The loop impedance and cable size tools read the smallest earthing conductor for the active conductor size. The earth size feeds straight back into the loop impedance sum.

Verified: read against the printed standard, pages 278-279. Checked 27 Sept 2026.

The earthing tool reads the smallest aluminium earthing conductor for the active conductor size. It is the aluminium companion to the copper table.

Verified: read against the printed standard, pages 278-279. Checked 26 Sept 2026.

The outbuilding earthing tool reads the electrode the installer picks, its least dimension and coating, and the depth or length and cover it is laid to.

Verified: read against the printed standard, pages 283 (PDF 287). Checked 1 Oct 2026.

The loop impedance and cable size tools read the highest loop impedance a circuit may have for its device curve and rating. The measured or calculated Zs is compared with it.

Verified: read against the printed standard, pages 427, 449. Checked 27 Sept 2026.

The tools read this data when they need it.

Verified: read against the printed standard, pages 427. Checked 26 Sept 2026.

The tools read this data when they need it.

Verified: read against the printed standard, pages 428. Checked 26 Sept 2026.

The maximum demand tool reads the demand rule for each load group in a domestic installation, for one dwelling or for a block of living units. The EV charger tool reads group (j)(iv).

Verified: read against the printed standard, pages 458–461. Checked 19 Sept 2026.

The maximum demand tool reads the demand rule for each load group outside domestic installations.

Verified: read against the printed standard, pages 468–469. Checked 19 Sept 2026.

The floor area demand tool reads the VA/m² range and average for each use. It takes no figure from the special equipment rows, which print none.

Verified: read against the printed standard, pages 473-474 (PDF 477-478). Checked 1 Oct 2026.

The circuit loading tool reads the diversity factor that Table C4 allows on the circuit upstream of a group of final subcircuits. The factor falls as the number of devices downstream rises.

Verified: read against the printed standard, pages 475. Checked 26 Sept 2026.

The circuit loading tool reads the assessed demand of a domestic cooking appliance from Table C5. The bands are set by the connected load in watts, and each band gives one demand current.

Verified: read against the printed standard, pages 477. Checked 26 Sept 2026.

The simplified selector reads the largest protective device rating Tables C6 and C7 allow for a conductor size. It reads one for each installation condition the tables separate, for circuits of one phase and of three.

Verified: read against the printed standard, pages 478-479. Checked 26 Sept 2026.

The simplified selector reads the ampere metres per percent of voltage drop that Table C8 gives. It reads them for each conductor size, for one phase and for three. The table stops at 95 mm², and the tool says so rather than extrapolating.

Verified: read against the printed standard, pages 481. Checked 26 Sept 2026.

The circuit loading tool reads from Table C9 the current each point counts for, by circuit-breaker rating. Points are socket-outlets, lighting and fixed loads on a final subcircuit. The same rows give the cable sizes the table pairs with each rating, and the largest range each pair allows.

Verified: read against the printed standard, pages 483-485. Checked 27 Sept 2026.

The wet area zones tool reads the least IP rating per zone here. It also reads what each zone permits. The A1 rows keep the communal IPX5 that A2 removed.

Derived: read against the printed standard, pages 320-323, 339-342, 350-352, 355-356, 358-361 (PDF = page + 4). Checked 1 Oct 2026.

The conduit fill tool reads the overall diameter of each cable, so it can add up the area in the bundle.

Verified: derived from manufacturer data, pages 2017 ed. PDF pp. 8 and 14 (printed pp. 6 and 12); 2012 ed. PDF pp. 11 and 16 (printed pp. 9 and 14), plus 2012 ed. PDF p. 17 (X-90 3 core+earth) and PDF p. 18 (4 core+earth) for the variant spreads; Prysmian 2015 PDF p. 12. Checked 19 Sept 2026.

The maximum circuit length tool reads the route length Table B1 allows for a conductor pair and a protective device, for a 0.4 s disconnection time at 230 V. A pair the table does not print has no tabulated length.

Verified: read against the printed standard, pages 452-453. Checked 26 Sept 2026.

The earthing tool reads the k factor for the earthing conductor material and insulation. The factor sets the size the adiabatic equation returns for the fault current and time.

Verified: read against the printed standard, pages 277-278. Checked 26 Sept 2026.

The tools read this data when they need it.

Verified: read against the printed standard, pages 421-423. Checked 26 Sept 2026.

The imperial cable tool reads the protective device rating Table I1 allows for an old imperial conductor, by wire count and wire diameter, installation method, insulation temperature rating and device type. The table is for alteration and repair work.

Verified: read against the printed standard, pages 540-541. Checked 26 Sept 2026.