Maximum Demand — Load Schedule & Assessment Tool
A load-schedule and assessment aid — not an automated AS/NZS 3000 calculator. It does the bookkeeping (per-phase totals, imbalance, motor physics, comparisons) while the responsibility for diversity, measurements and limitation stays where the rules put it: with you.
What it does
- Build a per-phase load schedule and see how every line contributes
- Apply your own assessed diversity — recorded as YOUR assessment
- Use a recorded maximum-demand measurement or a current-limiting arrangement
- Derive motor input current from output kW, efficiency and power factor (physics)
What it deliberately won't do yet
- Automatic AS/NZS 3000 Appendix C diversity — disabled until licensed table data is supplied and independently verified
Beta — check everything. These calculators are new and may not always be correct. Cross-reference every result against the current standards (AS/NZS 3000, AS/NZS 3008), manufacturer data and your own working before relying on it.
Installation & methodStep 1
Load schedule
Diversity factors in this report were entered by the user and have not been automatically verified against an AS/NZS 3000 demand table.
Maximum demand — your assessment
- L1 — highest
- 10 A
- L2
- 0 A
- L3
- 0 A
The rating suggestion satisfies In ≥ maximum demand ONLY — device type, trip curve, short-circuit rating, coordination and cable protection are not assessed, and a main switch (isolation) is not automatically a protective device. The mains link carries this demand into the cable-sizing tool, where the capacity and voltage-drop checks (and its data warnings) apply.
Maximum Demand — Load Schedule & Assessment Tool v2.0 · Dataset 2026.07-unverified.1 (0verified demand records) · every load's rule and reference is in the table below.
How every load contributed
| Load | Phase | Connected | Rule applied | Demand | Source / basis |
|---|---|---|---|---|---|
| general | L1 | 10 A | User-assessed diversity × 1 | 10 A | Assessment method — factor entered and owned by the user, not read from a Standard |
Diversity factors in this report were entered by the user and have not been automatically verified against an AS/NZS 3000 demand table.
Warnings
- • Phase imbalance is 100% — unbalanced single-phase load raises neutral current; check neutral sizing and re-balance if practical (threshold 20% is a heuristic, not a Standards limit).
Balancing suggestion
- Suggested single-phase placement (greedy, largest first) — a starting point only, it does not replace design verification:
- general (10.0 A) → L1
Assumptions
- • Schedule kW/kVA totals are BEFORE spare capacity and use each load's entered power factor; mixed-pf arithmetic sums magnitudes (no vector addition).
- • Diversity factors and rule choices in this schedule are the user's assessment — they have not been verified against an AS/NZS 3000 demand table.
Guidance only — verify before use. Results are design-assistance information only and depend entirely on the accuracy and completeness of what you enter. Assessment results rest on YOUR diversity factors; measurement and limitation results rest on the validity of the recorded value or limiting arrangement. This tool does not replace the current Standards, legislation, supply-authority requirements, manufacturer instructions or professional judgement, and it does not guarantee compliance. Maximum demand feeds mains, switchgear and protection decisions that must be made and verified by appropriately licensed people; unusual or high-risk installations need a qualified electrical designer or engineer.