Rapu rahi kaikawe iti rawa
Rapua te kaikawe iti rawa e whakaaetia ana mō tētahi ara iahiko.
Reads AS/NZS 3000:2018. Tables checked 26 Sept 2026.
Whakamātau mahi 5
Ka whakakī ia mahi i ngā uara tauira. Whakakapia ērā ki ō uara.
- 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.
Ngā whakauru
He tauira mahi me ngā whakauru taunoa.
- Whakamahinga o te ara
- Ngā socket‑outlet
- Rawa kaikawe
- Parahi
- Ngā kaikawe e hono ana ā-taha
- Kāo
Rahi kaikawe iti rawa
2.5mm²
- Uara Table 3.3
- 2.5mm²
- Ka whakahaerehia e
- AS/NZS 3000:2018 Table 3.3
He āwhina hoahoa tēnei hua. Manatokohia ki te paerewa o nāianei.
Ngā hīkoi tātaitanga
- Rahi iti rawa Table 3.32.5mm²
AS/NZS 3000:2018 Table 3.3
- Rahi iti rawa e pā anaHua2.5mm²
AS/NZS 3000:2018 Table 3.3
Mō tēnei tātaitai
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.
Pātai
He āwhina hoahoa te hua. Manatokohia ki te paerewa o nāianei.
He rahi taura iti rawa pēhea e hiahiatia ana e tētahi ara socket‑outlet?
Ka whakatakoto a AS/NZS 3000:2018 Table 3.3 i te 2.5 mm² mō tētahi ara iahiko socket‑outlet. Ka taea e Exception 1 o te ripanga te whakaae i tētahi kaikawe iti ake, engari ki ngā tikanga anake e whakatakotoria ana e ia. Pānuitia kātoa a Exception 1 i mua i tō heke i raro i te uara o te ripanga. Ka whakaatu te taputapu i te uara o te ripanga, ā, ka tohu ki te exception.
He aha te rahi iti rawa mō tētahi ara control, ara tohu rānei?
Ko Table 3.3 e whakatakoto ana i te 1 mm² mō ētahi atu ara iahiko, me te 0.5 mm² mō ngā ara relay control me ngā ara tohu. Ko ngā kaikawe kore he 6 mm². Ko ngā kaikawe whakapaetia, ngāwari he 0.75 mm².
He rahi pēhea e hiahiatia ana mō te waea aerial?
Ko Table 3.3 e whakatakoto ana i te 6 mm² mō te waea aerial parahi, me te 16 mm² mō te waea aerial konumohe. Kōwhiria te rawa i te form kia kitea te uara e pā ana.
Ka rerekē te iti rawa ina hono taura parallel?
Āe. Ka whakatakoto a AS/NZS 3000:2018 Clause 3.4.3 i te iti rawa 4 mm² mō ia taura i tētahi rōpū parallel. Ka whakatakoto anō te clause i ētahi atu tikanga. Pānuihia katoatia i mua i tō hoahoa i tētahi ara parallel.
Ngā Clause me ngā Table e pānuitia ana e tēnei taputapu
- AS/NZS 3000:2018 Cl 3.4.3Conductors connected in parallel
- AS/NZS 3000:2018 Table 3.3Nominal minimum cross-sectional area of conductors
Ia Clause me Table, me te pēhea i manatokotia ai ia tētahi
Ngā tūtohi i arotakehia whakamutunga i te 26 Sept 2026.
Ngā taputapu hononga
- Tātaitai rahi tauraFind the smallest cable size that passes each check.AS/NZS 3008.1.2AS/NZS 3008.1.1AS/NZS 3000
- Rapu aerial clearanceLook up aerial conductor clearances and spacing.AS/NZS 3000
- Tātaitai heke voltageCalculate voltage drop on a cable run and check the limit.AS/NZS 3008.1.2AS/NZS 3008.1.1AS/NZS 3000
He whai hua tēnei?
He pātai, he uara rānei e kitea ana he hē? Whakapā mai.