The 5% limit is AS/NZS 3000 Clause 3.6.2 (point of supply to any point; current ≤ load / max demand / device rating). Table C8 is the verified AS/NZS 3000 simplified method. The manual mV/A/m mode uses AS/NZS 3008 data you supply — confirm it for your cable, insulation and install conditions. Voltage rise (grid inverters) → AS/NZS 4777.1.
Maximum Demand
Calculate the estimated maximum demand for your installation.
Not applicable in single domestic (Table C1 col 2)
Spa / swimming pool heaters — "Not applicable" (load group (j)(iii) is communal only). Assess a domestic spa/pool under cooking (c, 50%) or heating (d, 75%).
Lifts (k) / Motors (l) — single domestic defers to Paragraph C2.4.1 + Table C2 — use the Commercial mode.
Connected loads are in amperes — use Conversions for amps from kW. Input rules from the table notes: lighting connected load per Note 6 (incandescent ≥60 W/lamp, fluorescent full, tracks 0.5 A/m); a 15 A/20 A outlet adds +10 A/+15 A to the socket base (Note 10). Footnotes 1–14 were read and applied as input rules; always confirm against the cited page.
Current modeCommercial · Table C2 (non-domestic)
Verified activea, b(i), b(ii), b(iii), c(i), c(ii), d, e, f, g, i
Excludedwelding (h), other (j) — assessment required (no fixed factor)
Maximum Demand · non-domestic (Table C2)
Lighting & socket-outlets
Appliances
Motors, lifts & special loads — enter each item's current (A), comma-separated; ranked automatically
Excluded — assessment required (no fixed factor)
Welding machines (h) — "in accordance with Paragraph C2.5.2, taking into account power factor". By assessment.
Other equipment not covered above (j) — by assessment.
Some table notes (footnotes) could not be visually verified. Results are limited to rows whose calculation factors are visually verified and tested — always confirm against the cited page.
Maximum Demand · multiple domestic
Multiple domestic installations — not yet supported (blocked, with reason). Verified & readable off the scan: per-living-unit lighting (a)(i) — 2–5 units 6 A/unit · 6–20 units 5 A + 0.25 A/unit · 21+ 0.5 A/unit; socket-outlets (b)(i) — 2–5 units 10 A + 5 A/unit · 6–20 15 A + 3.75 A/unit · 21+ 50 A + 1.9 A/unit. Not yet verified together: the cooking/space-heating/water multi-unit columns, the communal loads (which defer to Paragraph C2.4.1 + Table C2), and the multiphase division (Note 2: units ÷ phases). A partial lighting+socket-only calculator would give a dangerously incomplete block maximum demand, so this mode stays disabled until all pieces are verified as one. Use Single Domestic per living unit meanwhile.
Status Source verified
SourceAS/NZS 3000:2018 §2.6 (p122–128) · AU + NZ
Asks when unsurejurisdiction / missing rating / judgement → asks or advises
RCD Requirement Checker
Verified from AS/NZS 3000:2018 Section 2.6 (p122–128). AU and NZ differ — jurisdiction is required. Home-care medical defers to AS/NZS 3003. Judgement cases (increased-risk, essential-function, VSD nuisance) are flagged, not auto-decided. Always confirm against the cited clause.
Status Source verified (sizing/depth) · advisory (MEN/design)
LimitMEN/outbuilding/generator = judgement → flagged, never an unsafe design
Earthing / Bonding Assistant
Deterministic: earthing-conductor size (Table 5.1) and electrode depth (Cl 5.3.6.3, AU 1.2 m / NZ 1.8 m); conditional pipe bonding (Cl 5.6.2.3). MEN arrangement, outbuilding earthing and generator/neutral interactions are design/judgement — the assistant cites the clause/figure and flags manual assessment; it does not produce an unsafe simplified earthing design. Always confirm against the cited page.
Asks when unsureabove-ground/spa/fountain geometry → pick the zone; sauna → assessment
Pool / Spa / Fountain Zone Checker
Classify (in-ground pool only)
Verified from AS/NZS 3000:2018 Table 6.2 (pools/spas, Zones 0/1/2) + Table 6.3 (fountains, Zones 0/1). Only the in-ground pool zone geometry (Fig 6.15: Zone 1 = 1.5 m, Zone 2 = +1.5 m) is auto-classified; above-ground/spa/fountain geometry varies → pick the zone. Saunas (Fig 6.22, Cl 6.5) are temperature-classified → assessment. Always confirm against the cited page.
Status Source verified
SourceAS/NZS 3000:2018 Table 8.1 (p427) · Zs at 230 V
Verified from AS/NZS 3000:2018 Table 8.1 — maximum Zs at 230 V. Tester tolerance is set by AS/NZS 3017 (apply your instrument's tolerance to the measured value). The required disconnection time (0.4 s / 5 s) is per Cl 5.7.2. Always confirm against the cited table.
CategoryA/B/C from Table 3.5 — you select it (not auto-classified)
Underground — Minimum Depth of Cover
Depths verified from AS/NZS 3000:2018 Table 3.6 (Cl 3.11.4.4). The wiring-system category A/B/C comes from Table 3.5 (cable type × protection method) — select it yourself; it is not auto-classified. Mechanical protection construction is Cl 3.11.4.3; identification / marker tape is Cl 3.11.4.5 (AS/NZS 2648.1).
Power · Current · kVA
Universal electrical formulas — single-phase uses V×A, three-phase uses √3 × VL-L × A. This is physics, not a standards lookup; for compliance demand use Max Demand.
Asks when unsurefixed barrier / basin / missing distance → pick the zone
Bathroom Zone Checker
Classify the zone (no-barrier configurations)
Verified from AS/NZS 3000:2018 Table 6.1 + Clause 6.2.4 (p322–326) and zone Figures 6.1–6.6. Fixed barriers/screens and basins change the zone boundaries (Fig 6.7: r₁ = 0.6 − a − b) — for those the checker asks you to pick the zone. Always confirm against the cited page.
Knowledge
Image Analysis
Analyse an installation photo
Switchboard · MEN connection · single-line diagram · installation photo. Choose an image to prepare it for review against AS/NZS 3000.
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