Cable sizing

Select a cable for your load and installation.

AS/NZS 3008 · 3000

1 · Load & Supply Cl 2.3 A(a) — design current I_b

Standard

Phase

Nominal voltage

Design load

Power factor

cos φ

Efficiency

Load growth

2 · Cable Tables 4–21 — type & conductor

Cable type

Insulation

Conductor

CopperAluminium

Sizing mode

AutoManual

Parallel cables

× / phase

Formation

3 · Installation & Derating Tables 3(1)–3(4) method · Tables 22–29 factors

Installation

Arrangement (in air)

Grouping arrangement

Adjacent circuits

circ.

Ambient air temp.

°C

4 · Voltage Drop Cl 2.4 — Tables 40–51 / Cl 4.5

Cable distance

Max voltage drop

V-drop method

Conductor temp.

5 · Protection & Short-Circuit Cl 2.5 — Table 52 · AS/NZS 3000 §2.5.3

Protective device

Device rating I_n

Disconnection time

Instant trip ×

× I_n

Fault currentFault calculator

Clearing time

Fault source document

Breaking capacity

kA I_cu

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Results

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solved

Detailed analysis Supporting values, full checks, comparison and audit

Document

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Audit-ready sheet · —

Notes

All cable installation per AS/NZS 3000:2018.
Ratings, rating factors and impedance per the published tables of AS/NZS 3008.1.1:2017 — table references on the calculation sheet.
Verify protective-device let-through energy against manufacturer curves.

References

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— · Rev A · — Report Print / Save as PDF A professional aid, not engineering judgement — you remain responsible for verifying every input and result against the standards that apply to your work.