Tātaitai Te Uta o te Ara Iahiko
Tatau ngā pointi e taea ai e te final subcircuit te kawe.
Reads AS/NZS 3000:2018. Tables checked 27 Sept 2026.
Whakamātau mahi 6
Ka whakakī ia mahi i ngā uara tauira. Whakakapia ērā ki ō uara.
- Load a control panelThe load on each circuit in the panel.
- Count sockets on a house circuitThe loading of twelve 10 A socket‑outlets on a 20 A circuit.
- Count lights on a circuitThe loading of thirty lighting points on a 10 A circuit.
- Load a kitchen circuit with a hobThe demand of a 7.2 kW hob on its circuit.
- Load an office socket circuitThe loading of eight 10 A socket‑outlets on a 20 A office circuit.
- Apply diversity upstreamThe loading of a submain that feeds six circuits.
Ngā whakauru
He tauira mahi me ngā whakauru taunoa.
- Reiti circuit-breaker
- 20 A
- Rahi taura
- 2.5 mm²
- Whakaurunga
- Kāinga
- Point rama
- 0
- Pūtau hiko 10 A
- 8
- Pūtau hiko 15 A
- 0
- Pūtau hiko 20 A
- 0
- Utanga kua whakatūria, kāore e nekehia
- 0 A
- Whakauru tētahi taputapu tunu kai
- Kāo
- Whakamahia te rerekētanga o runga
- Kāo
Tapeke o ngā tāpuke
8A
- Reiti circuit-breaker
- 20A
He āwhina hoahoa tēnei hua. Manatokohia ki te paerewa o nāianei.
Ngā hīkoi tātaitanga
- Ngā pūwāhi rama0A
AS/NZS 3000:2018 Table C9
- 10 A socket‑outlets8A
AS/NZS 3000:2018 Table C9
- 15 A socket‑outlets0A
AS/NZS 3000:2018 Table C9
- 20 A socket‑outlets0A
AS/NZS 3000:2018 Table C9
- Utu mau, utu nekeneke kore0A
AS/NZS 3000:2018 Table C9
- Tapeke o ngā tāpiriHua8A
AS/NZS 3000:2018 Table C9
- Ine circuit-breaker20A
AS/NZS 3000:2018 Table C9
Mō tēnei tātaitai
How this is calculated
The tool counts the points a final subcircuit can carry. It reads AS/NZS 3000:2018 Table C9. You enter the breaker rating, the cable size and the points on the circuit.
- Lighting points. Each point adds the current that Table C9 gives for a lighting point.
- Socket‑outlets. The tool counts 10 A, 15 A and 20 A socket‑outlets. Each group has its own contribution in Table C9.
- Fixed and stationary load. You enter the rated current of fixed loads. The tool adds it in full.
- Cooking and diversity. If you turn them on, the tool adds the cooking demand and applies the diversity for upstream devices.
- Sum of contributions. The tool adds all contributions.
- Check. It compares the sum with the breaker rating. The pair of cable size and device rating must also be one that Table C9 lists.
| Step | Table or clause | What it decides |
|---|---|---|
| Point contributions | AS/NZS 3000:2018 Table C9 | The current each point counts for |
| Sum | Table C9 | The total counted load |
| Pair | Table C9 | Whether the cable and device are listed together |
Worked example
- Eight 10 A socket‑outlets on a 20 A circuit. The cable is 2.5 mm² in a domestic installation. The sum of contributions is 8 A. That is within the 20 A breaker rating, so the tool passes the circuit.
Limits
The tool fails a circuit when the sum is over the rating. It warns when Table C9 does not pair the cable with the device. It also fails a cooking range that the table does not permit.
It counts points. It does not check the voltage drop or the loop impedance. Use the cable size calculator for those.
See also: Maximum demand with Table C1 and C2, What size breaker for 4 mm² cable and the maximum demand tool.
Pātai
He āwhina hoahoa te hua. Manatokohia ki te paerewa o nāianei.
He aha te mahi a te taputapu Te Uta o te Ara Iahiko?
Ka tāpiri te taputapu i te pānga o ia point o tētahi final subcircuit. He 0.5 A ia point rama. He 2 A te socket 10 A ina he whakaurunga kore-kāinga kāore he air conditioning, he 1 A atu. Me kaua e neke atu te tapeke i te reiti circuit-breaker.
Ko ēhea ngā tūtohi e whakamahia ana e ia?
Ka ahu mai ngā tāpiringa i AS/NZS 3000:2018 Table C9. Ka ahu mai te demand tunu kai i Table C5. Ka ahu mai te diversity factor i runga i Table C4. Ka ahu mai ngā takirua taura me te taputapu i ngā rārangi Table C9 ōrite.
E hia ngā socket‑outlet ka taea e au te whakauru ki tētahi ara iahiko 20 amp?
I tētahi whakaurunga kāinga, ka tatau ia socket 10 A hei 1 A. Nō reira ka tae ngā socket 20 ki te reiti o tētahi taputapu 20 A. Ina kāore he air conditioning mau i tētahi whakaurunga kore-kāinga, ka tatau ia socket hei 2 A. Nō reira ka tae ngā socket 10 ki taua reiti ōrite.
Ngā Clause me ngā Table e pānuitia ana e tēnei taputapu
- AS/NZS 3000:2018 App C Para C2.5Demand on a final subcircuit
- AS/NZS 3000:2018 Table C4Upstream circuit loading after diversity
- AS/NZS 3000:2018 Table C5Maximum demand for domestic cooking appliances
- AS/NZS 3000:2018 Table C9Loading of points per final subcircuit
Ia Clause me Table, me te pēhea i manatokotia ai ia tētahi
Ngā tūtohi i arotakehia whakamutunga i te 27 Sept 2026.
Ngā taputapu hononga
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