Minimum conductor size lookup
Hanapin ang pinakamaliit na conductor na pinapayagan para sa circuit.
Reads AS/NZS 3000:2018. Tables checked 26 Sept 2026.
Subukan ang isang job 5
Nilalagyan ng halimbawang value ang bawat job. Palitan ang mga ito ng sarili mong value.
- Find the smallest control conductor allowedThe minimum copper size for a signal and relay control circuit.
- Find the smallest aerial conductorThe minimum aluminium size for an aerial run.
- Find the smallest flexible cordThe minimum size for a flexible cord.
- Find the smallest bare conductorThe minimum size for a bare conductor.
- Find the smallest parallel conductorThe minimum size a conductor in parallel may be.
Mga input
Worked example gamit ang mga default na input.
- Gamit ng circuit
- Mga socket‑outlet
- Materyal ng conductor
- Tanso
- Mga conductor na konektado sa parallel
- Hindi
Pinakamaliit na laki ng conductor
2.5mm²
- Value ng Table 3.3
- 2.5mm²
- Kinokontrol ng
- AS/NZS 3000:2018 Table 3.3
Design aid lang ang resultang ito. I-verify ito laban sa kasalukuyang standard.
Mga hakbang ng kalkulasyon
- Table 3.3 minimum size2.5mm²
AS/NZS 3000:2018 Table 3.3
- Pinakamaliit na laki na nalalapatResulta2.5mm²
AS/NZS 3000:2018 Table 3.3
Tungkol sa calculator na ito
How this is calculated
The tool looks up the smallest conductor that AS/NZS 3000:2018 Table 3.3 allows for a use. It is a table lookup. It does not size a cable for current or voltage drop.
- Use. You pick the use: socket‑outlets, other circuits, signal and relay control, bare conductors, insulated flexible conductors or aerial wiring.
- Material. You pick copper or aluminium. Table 3.3 has no aluminium row for some uses. The tool then refuses and says so.
- Table value. The tool reads the minimum cross-sectional area from Table 3.3 for that use and material.
- Parallel conductors. You can mark the conductors as run in parallel. The tool then compares the table value with the parallel floor and keeps the larger.
- Size that applies. The tool gives the minimum size that applies, and names Table 3.3 as the source.
| Step | Table or clause | What it decides |
|---|---|---|
| Table value | AS/NZS 3000 Table 3.3 | The smallest area for the use and material |
| Parallel floor | Cl 3.4.3 | The floor for a parallel group |
| Size that applies | Table 3.3 | The larger of the two |
Worked example
Aerial wiring in copper. The tool gives 6 mm². The Table 3.3 value is also 6 mm², and the source is AS/NZS 3000:2018 Table 3.3.
Limits
- Table 3.3 carries two exceptions. Read them before you use the size.
- Exception 1 can allow a smaller socket‑outlet conductor. It sets conditions that you must meet first.
- The minimum is a floor. The cable must also pass current capacity, voltage drop and fault checks.
- Use the cable size calculator for those checks.
- Clause 3.4.3 sets more conditions on a parallel group than a minimum size.
- The tool does not read AS/NZS 3008.1.
See also: Cable size calculator, Voltage drop calculator and What size breaker for 4 mm² cable.
Mga tanong
Design aid ang resulta. I-verify ito laban sa kasalukuyang standard.
Anong minimum cable size ang kailangan ng socket‑outlet circuit?
Itinatakda ng AS/NZS 3000:2018 Table 3.3 ang 2.5 square millimetres para sa socket‑outlet circuit. Puwedeng payagan ng Exception 1 sa table ang mas maliit na conductor, pero sa mga kondisyon lang na itinakda nito. Basahin nang buo ang Exception 1 bago ka gumamit ng mas maliit sa table value. Iniuulat ng tool ang table value at itinuturo ang exception.
Ano ang minimum size para sa control o signal circuit?
Itinatakda ng Table 3.3 ang 1 square millimetre para sa ibang circuit, at 0.5 square millimetre para sa relay control at signal circuit. Ang bare conductor ay 6 square millimetre. Ang insulated flexible conductor ay 0.75 square millimetre.
Anong laki ang kailangan para sa aerial wiring?
Itinatakda ng Table 3.3 ang 6 square millimetre para sa copper aerial wiring at 16 square millimetre para sa aluminium aerial wiring. Piliin ang material sa form para makita ang value na nalalapat.
Binabago ba ng pagkokonekta ng cable nang parallel ang minimum?
Oo. Naglalagay ang AS/NZS 3000:2018 Clause 3.4.3 ng minimum na 4 square millimetres sa bawat cable sa parallel group. May karagdagang kondisyon din ang clause. Basahin ito nang buo bago mo idisenyo ang parallel run.
Mga clause at table na binabasa ng tool na ito
- AS/NZS 3000:2018 Cl 3.4.3Conductors connected in parallel
- AS/NZS 3000:2018 Table 3.3Nominal minimum cross-sectional area of conductors
Bawat clause at table, kasama kung paano ito na-verify
Huling na-check ang mga table noong 26 Sept 2026.
Mga kaugnay na tool
- Cable size calculatorFind the smallest cable size that passes each check.AS/NZS 3008.1.2AS/NZS 3008.1.1AS/NZS 3000
- Aerial clearance lookupLook up aerial conductor clearances and spacing.AS/NZS 3000
- Voltage drop calculatorCalculate voltage drop on a cable run and check the limit.AS/NZS 3008.1.2AS/NZS 3008.1.1AS/NZS 3000
Nakatulong ba ito?
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