AS/NZS 3008.1.2:2017
Te paerewa kōwhiri taura mō Aotearoa. Ka whakamahi te AmpSize i a ia mō ngā raraunga kaikawe: ngā reiti iahiko, te aukati me te reactance, ngā derating factors mō te ara, me te short-circuit k factor.
Ngā tuhipoka
- Putanga e whakahuatia ana
- AS/NZS 3008.1.2:2017
- Ngā whakatikatika kua whakamahia
- Kāore he whakatikatika i whakaingoatia i te puna (16 Table)
- Tūtohi i arotakehia whakamutunga
- 26 Sept 2026 (tuatahi 19 Sept 2026)
- Ngā tūtohi
- 16: 16 kua whakamanatia
- Ngā Clause
- 6
Kāore he kupu o te paerewa i tuhia anō ki konei. He āwhina hoahoa a AmpSize. Whakamanatia ngā hua ki te paerewa o nāianei.
Ngā ihirangi (22)
Ngā Clause (6)
Ngā rōpū ara iahiko i roto i ngā enclosure waea i raro i te whenua
Ka whakaingoa te taputapu Rahi Taura i tēnei clause mō tētahi rōpū ara iahiko i ngā enclosure i raro i te whenua. Ka whakaingoa te clause i ngā Table 26(1) me 26(2), ā, ka pānui te taputapu i aua mea mō tētahi taura kotahi ia duct. Mō tētahi duct e pupuri ana i te ara iahiko katoa, ka tuku te Table 3(4) i ngā ara iahiko e tohatoha ana i tētahi enclosure kotahi ki te Table 22. Ka tango reira te taputapu i te tauwehe iti rawa i waenga i ngā tauwehe Table 26(2) me Table 22, ā, ka whakaingoa i te tūtohi i pānuitia e ia.
Ngā taputapu e pānui ana i tērā:
E whakahuahia ana e 2
Iahiko harmonic tuatoru i te neutral
Ka pānui te taputapu Rahi Taura i tēnei clause ina whakauruhia e koe te ōrau third harmonic i runga i tētahi ara iahiko wāhanga toru. Ka tā ia i te Iahiko Neutral e whakaputaina ana e te harmonic, ka whakamahi i te tauwehe whakaiti Table 2, ā, ka whakaingoa i te clause i te taha o te hikoi kia taea ai e koe te arotake i te tūāpapa rahi e whakatakoto ana te clause. Ka mahi ano te taputapu Correction Factors i taua mea.
Ngā taputapu e pānui ana i tērā:
Tātaitai rahi taura, Tātaitai correction factor me Harmonics, Iahiko Neutral me te k factor.
E whakahuahia ana e 1
Tikanga heke voltage
Ka whakamahi ngā taputapu Heke Voltage me Piki Voltage i tēnei tikanga. Ka whakakotahitia te aukati me te reactance i te power factor kia puta ai ngā millivolts per amp metre. Ka whakareia taua uara ki te iahiko me te roa o te ara.
Ngā taputapu e pānui ana i tērā:
E whakahuahia ana e 9
- Voltage drop single phase vs three phase
- Voltage drop on 2.5 mm² over 30 m
- Submain voltage drop estimate for a 160 A tender
- 24 V DC voltage drop on an instrument loop
- Total voltage drop: mains, submain and final
- Voltage rise for a 5 kW solar inverter cable
- AS/NZS 3000 Clause 3.6.2: voltage drop limit
- Voltage drop with the mV/A·m method
- Voltage drop basics
Heke voltage me tētahi uta kāore i te taurite
Ka huri te taputapu Heke Voltage ki te Equation 4.6 o tēnei clause ina whakauruhia e koe tētahi iahiko neutral i runga i tētahi ara iahiko wāhanga toru. Ka mahi ia i runga i te tikanga kaikawe kotahi, ā, ka tuhi i te heke neutral hei hikoi motuhake, ia kaikawe i runga i tōna ake roa.
Ngā taputapu e pānui ana i tērā:
Mahi short-circuit
Ka mahi te taputapu fault rating i tēnei clause. Ka whakatairite i te energy e tukuna mai e te taputapu whakamaru ki te energy e taea e te kaikawe te mau. Ka whakamahi te arotake i te iahiko hapa, te wā whakamaramatanga me te k factor.
Ngā taputapu e pānui ana i tērā:
E whakahuahia ana e 7
- Switchboard fault rating at 25 kA for 1 s
- Consumer mains fault withstand for 16 mm² copper
- AS/NZS 3008.1.2 Table 52: the k factor
- AS/NZS 3008 vs BS 7671: cable sizing compared
- Prospective fault current at a main switchboard
- IB ≤ IN ≤ IZ: the overload rule on a 32 A circuit
- Short-circuit withstand and the k factor
Roa o te short-circuit
Ka whakaingoa te taputapu fault rating i tēnei clause ina nui ake te wā whakamahea i tuhia e koe i te 5 s e uhia ana e te clause. Ka tā tonu te hua, me tētahi whakatūpato e kī ana ka mutu te tūāpapa tohutoro i te 5 s.
Ngā taputapu e pānui ana i tērā:
E whakahuahia ana e 1
Ngā tūtohi (16)
Reduction factors for harmonic currents in 4- and 5-core cables
Ka pānui te taputapu Correction Factors i te tauwehe whakaiti mō te iahiko harmonic tuatoru i roto i tētahi taura four-core, five-core rānei. Ina neke atu i te 33 %, ka rahi ia i runga i te iahiko neutral. Ka pānui te taputapu Harmonics i taua pae mai i tētahi spectrum.
Kua manatokotia: pānuitia ki te paerewa tā, whārangi 27–28. I tirohia 24 Sept 2026.
Ngā taputapu e pānui ana i tērā:
Tātaitai correction factor me Harmonics, Iahiko Neutral me te k factor.
E whakahuahia ana e 2
Current ratings, single-core cable, two cables per circuit, thermoplastic 75 °C
Ka pānui te taputapu Rahi Taura i te reiti kua tuhia ki konei mō tētahi taura single-core thermoplastic i runga i tētahi ara iahiko wāhanga kotahi, parahi, konumohe rānei, mō ia tikanga whakaurunga.
Kua manatokotia: pānuitia ki te paerewa tā, whārangi 35–37. I tirohia 24 Sept 2026.
Ngā taputapu e pānui ana i tērā:
E whakahuahia ana e 9
- Hot water cylinder cable size for a 3 kW element
- Cable size for a 20 A heat pump circuit in summer
- AmpSize vs jCalc vs free cable sizing tools
- EV charger cable size for a 7 kW 32 A circuit
- AS/NZS 3008.1.2 Tables 4 to 21: current ratings
- AS/NZS 3008 vs BS 7671: cable sizing compared
- Motor full load current: 11 kW 400 V DOL
- Cable size for a 32 A single-phase 25 m run
- Current-carrying capacity and derating
Current ratings, single-core cable, two cables per circuit, cross-linked 90 °C
Ka pānui te taputapu Rahi Taura i te reiti kua tuhia ki konei mō tētahi taura single-core cross-linked i runga i tētahi ara iahiko wāhanga kotahi, parahi, konumohe rānei, mō ia tikanga whakaurunga.
Kua manatokotia: pānuitia ki te paerewa tā, whārangi 38–40. I tirohia 24 Sept 2026.
Ngā taputapu e pānui ana i tērā:
E whakahuahia ana e 9
- Hot water cylinder cable size for a 3 kW element
- Cable size for a 20 A heat pump circuit in summer
- AmpSize vs jCalc vs free cable sizing tools
- EV charger cable size for a 7 kW 32 A circuit
- AS/NZS 3008.1.2 Tables 4 to 21: current ratings
- AS/NZS 3008 vs BS 7671: cable sizing compared
- Motor full load current: 11 kW 400 V DOL
- Cable size for a 32 A single-phase 25 m run
- Current-carrying capacity and derating
Current ratings, single-core cable, three cables per circuit, thermoplastic 75 °C
Ka pānui te taputapu Rahi Taura i te reiti kua tuhia ki konei mō tētahi taura single-core thermoplastic i runga i tētahi ara iahiko wāhanga toru, parahi, konumohe rānei, mō ia tikanga whakaurunga.
Kua manatokotia: pānuitia ki te paerewa tā, whārangi 44–46. I tirohia 24 Sept 2026.
Ngā taputapu e pānui ana i tērā:
E whakahuahia ana e 9
- Hot water cylinder cable size for a 3 kW element
- Cable size for a 20 A heat pump circuit in summer
- AmpSize vs jCalc vs free cable sizing tools
- EV charger cable size for a 7 kW 32 A circuit
- AS/NZS 3008.1.2 Tables 4 to 21: current ratings
- AS/NZS 3008 vs BS 7671: cable sizing compared
- Motor full load current: 11 kW 400 V DOL
- Cable size for a 32 A single-phase 25 m run
- Current-carrying capacity and derating
Current ratings, single-core cable, three cables per circuit, cross-linked 90 °C
Ka pānui te taputapu Rahi Taura i te reiti kua tuhia ki konei mō tētahi taura single-core cross-linked i runga i tētahi ara iahiko wāhanga toru, parahi, konumohe rānei, mō ia tikanga whakaurunga.
Kua manatokotia: pānuitia ki te paerewa tā, whārangi 47–49. I tirohia 24 Sept 2026.
Ngā taputapu e pānui ana i tērā:
E whakahuahia ana e 9
- Hot water cylinder cable size for a 3 kW element
- Cable size for a 20 A heat pump circuit in summer
- AmpSize vs jCalc vs free cable sizing tools
- EV charger cable size for a 7 kW 32 A circuit
- AS/NZS 3008.1.2 Tables 4 to 21: current ratings
- AS/NZS 3008 vs BS 7671: cable sizing compared
- Motor full load current: 11 kW 400 V DOL
- Cable size for a 32 A single-phase 25 m run
- Current-carrying capacity and derating
Current ratings, multicore cable with three or four cores, thermoplastic 75 °C
Ka pānui te taputapu Rahi Taura i te reiti kua tuhia ki konei mō tētahi taura multicore thermoplastic, parahi, konumohe rānei, mō ia tikanga whakaurunga. Ko taua uara te tīmatanga, i mua i tētahi derating.
Kua manatokotia: pānuitia ki te paerewa tā, whārangi 62–64. I tirohia 24 Sept 2026.
Ngā taputapu e pānui ana i tērā:
Tātaitai rahi taura, Tātaitai correction factor, Arotake ara iahiko o nāianei me Tātaitai ara iahiko mōtā.
E whakahuahia ana e 25
- Hot water cylinder cable size for a 3 kW element
- How many amps can 1.5 mm² cable carry?
- How many amps can 10 mm² cable carry?
- How many amps can 16 mm² cable carry?
- How many amps can 2.5 mm² cable carry?
- How many amps can 6 mm² cable carry?
- What size cable for a 22 kW EV charger?
- What size cable for a 25 A circuit?
- What size cable for a lighting circuit in NZ?
- What size cable for power points in NZ?
- Three circuits in a hot ceiling: correction factor
- What size breaker for 4 mm² cable
- Cable size for a 20 A heat pump circuit in summer
- AmpSize vs jCalc vs free cable sizing tools
- EV charger cable size for a 7 kW 32 A circuit
- AS/NZS 3008.1.2 Tables 22 to 29: derating
- AS/NZS 3008.1.1 vs 3008.1.2: AU and NZ conditions
- AS/NZS 3008.1.2 Tables 4 to 21: current ratings
- AS/NZS 3008 Table 13 (now 3.18): multicore ratings
- AS/NZS 3008 vs BS 7671: cable sizing compared
- AWG and the NEC for NZ and AU electricians
- Motor full load current: 11 kW 400 V DOL
- Cable size for a 32 A single-phase 25 m run
- Current-carrying capacity and derating
- Checking an existing circuit
Current ratings, multicore cable with three or four cores, cross-linked 90 °C
Ka pānui te taputapu Rahi Taura i te reiti kua tuhia ki konei mō tētahi taura multicore cross-linked, parahi, konumohe rānei, mō ia tikanga whakaurunga.
Kua manatokotia: pānuitia ki te paerewa tā, whārangi 65–67. I tirohia 24 Sept 2026.
Ngā taputapu e pānui ana i tērā:
E whakahuahia ana e 10
- Hot water cylinder cable size for a 3 kW element
- Submain cable size for 3-phase 100 A over 60 m
- Cable size for a 20 A heat pump circuit in summer
- AmpSize vs jCalc vs free cable sizing tools
- EV charger cable size for a 7 kW 32 A circuit
- AS/NZS 3008.1.2 Tables 4 to 21: current ratings
- AS/NZS 3008 vs BS 7671: cable sizing compared
- Motor full load current: 11 kW 400 V DOL
- Cable size for a 32 A single-phase 25 m run
- Current-carrying capacity and derating
Grouping factors for bunched circuits, buried circuits and underground wiring enclosures
Ka pānui ngā taputapu rahi taura me correction factors i te factor mō ngā ara e tohatoha ana i tētahi ara. He iti ake te factor ina nui ake ngā ara e tahi ana, ā, he nui ake te taura.
Kua manatokotia: pānuitia ki te paerewa tā, whārangi 79, 84–87. I tirohia 24 Sept 2026.
Ngā taputapu e pānui ana i tērā:
Tātaitai rahi taura, Tātaitai correction factor me Arotake ara iahiko o nāianei.
E whakahuahia ana e 9
- Hot water cylinder cable size for a 3 kW element
- Submain cable size for 3-phase 100 A over 60 m
- Three circuits in a hot ceiling: correction factor
- What size breaker for 4 mm² cable
- Cable size for a 20 A heat pump circuit in summer
- AS/NZS 3008.1.2 Tables 22 to 29: derating
- AS/NZS 3008 Table 22 (now 3.33): bunched grouping
- Current-carrying capacity and derating
- Correction factors in the 2017 and 2025 editions
Grouping factors for single-core circuits on trays, ladder supports, racks and cleats in air
Ka pānui ngā taputapu rahi taura me correction factors i te factor mō ngā ara single-core i runga i tētahi tray, ladder, rack, cleats rānei. Ka whakawhirinaki te factor ki te tautoko, ngā taumata, me te pā o ngā ara ki a rātou anō.
Kua manatokotia: pānuitia ki te paerewa tā, whārangi 80. I tirohia 26 Sept 2026.
Ngā taputapu e pānui ana i tērā:
Tātaitai rahi taura, Tātaitai correction factor, Arotake ara iahiko o nāianei me Whakakī cable tray me te ladder.
Grouping factors for multicore cables on trays, ladder supports, racks and cleats in air
Ka pānui ngā taputapu rahi taura me correction factors i te factor mō ngā taura multicore i runga i tētahi tray, ladder, rack, cleats rānei. Ka whakawhirinaki te factor ki te tautoko, ngā taumata, me te pā o ngā taura ki a rātou anō.
Kua manatokotia: pānuitia ki te paerewa tā, whārangi 82. I tirohia 26 Sept 2026.
Ngā taputapu e pānui ana i tērā:
Tātaitai rahi taura, Tātaitai correction factor, Arotake ara iahiko o nāianei me Whakakī cable tray me te ladder.
Rating factors for air and soil ambient temperature
Ka pānui ngā taputapu rahi taura me correction factors i te factor mō te pāmahana hau, whenua rānei i te ara. Ka iti iho te iahiko e taea e te taura te kawe mēnā he wera te ara.
Kua manatokotia: pānuitia ki te paerewa tā, whārangi 88. I tirohia 24 Sept 2026.
Ngā taputapu e pānui ana i tērā:
Tātaitai rahi taura, Tātaitai correction factor me Arotake ara iahiko o nāianei.
E whakahuahia ana e 11
- Submain cable size for 3-phase 100 A over 60 m
- Three circuits in a hot ceiling: correction factor
- What size breaker for 4 mm² cable
- Cable size for a 20 A heat pump circuit in summer
- AmpSize vs jCalc vs free cable sizing tools
- AS/NZS 3008.1.2 Tables 22 to 29: derating
- AS/NZS 3008.1.1 vs 3008.1.2: AU and NZ conditions
- AS/NZS 3008 Table 27 (now 3.44, 3.45): temperature
- Current-carrying capacity and derating
- Correction factors in the 2017 and 2025 editions
- Underground cables and civil interfaces
Rating factors for depth of laying
Ka pānui ngā taputapu rahi taura me correction factors i te factor mō te hōhonutanga o te taura tanu. He mō ngā taura tanu anake.
Kua manatokotia: pānuitia ki te paerewa tā, whārangi 89. I tirohia 24 Sept 2026.
Ngā taputapu e pānui ana i tērā:
Tātaitai rahi taura, Tātaitai correction factor me Arotake ara iahiko o nāianei.
Rating factors for thermal resistivity of the soil
Ka pānui ngā taputapu rahi taura me correction factors i te factor mō te aukati wera o te oneone. He mō ngā taura tanu anake.
Kua manatokotia: pānuitia ki te paerewa tā, whārangi 90. I tirohia 24 Sept 2026.
Ngā taputapu e pānui ana i tērā:
Tātaitai rahi taura, Tātaitai correction factor me Arotake ara iahiko o nāianei.
Reactance at 50 Hz and a.c. resistance at 50 Hz
Ka pānui ngā taputapu Heke Voltage, Piki Voltage, Loop Impedance me Rahi Taura i te aukati me te reactance o te kaikawe i te pāmahana whakahaere mai i ēnei raraunga. Ka pānui te taputapu Loop Power Budget i te aukati o te kaikawe.
Kua manatokotia: pānuitia ki te paerewa tā, whārangi 98, 102–103. I tirohia 24 Sept 2026.
Ngā taputapu e pānui ana i tērā:
Tātaitai rahi taura, Tātaitai heke voltage, Tātaitai earth fault loop impedance, Tātaitai Piki Voltage, Tātaitai Te Roa Nui Rawa o te Ara Iahiko, Loop power budget mō ngā loop 4-20 mA, Arotake ara iahiko o nāianei, Tātaitai taumata hapa, Tātaitai heke voltage katoa me Utu ngaronga pūngao taura ā-mahi.
E whakahuahia ana e 13
- Homeowner shed supply voltage drop over 60 m
- Lighting circuit loop impedance, B curve 10 A
- Voltage drop single phase vs three phase
- Submain voltage drop estimate for a 160 A tender
- Max cable length for a 20 A C curve subcircuit
- 24 V DC voltage drop on an instrument loop
- Fault level at a sub-board, 300 kVA transformer
- Off-grid battery bank autonomy at 48 V
- AS/NZS 3000 Table 8.1: max Zs by curve and rating
- Voltage rise for a 5 kW solar inverter cable
- Voltage drop with the mV/A·m method
- Voltage drop basics
- Prospective fault current at a board
Values of constant K for determination of permissible short-circuit currents
Ka hoatu tēnei table i tētahi k factor papatahi mō ia rauemi me ia insulation. Ka pānui ngā taputapu rahi taura me fault rating i te Table 52 mai i te table rohe short-circuit anō. I reira, ka whakawhirinaki te k factor ki ngā rohe pāmahana e whakatakotoria ana e Tables 53 me 55.
Kua manatokotia: pānuitia ki te paerewa tā, whārangi 121–122. I tirohia 19 Sept 2026.
Ngā taputapu e pānui ana i tērā:
Tātaitai rahi taura, Tātaitai fault rating taura, Arotake ara iahiko o nāianei me Trip curve MCB me te rohe taura.
Short-circuit K values and temperature limits
Ka pānui te taputapu fault rating i te k factor mō te pāmahana tīmata kaikawe me te rohe pāmahana short-circuit. Ka puta te rohe i te karaehe insulation me te pae rahi kaikawe, i te hononga rānei i te ara taura ina iti iho te hononga i ngā mea e rua.
Kua manatokotia: pānuitia ki te paerewa tā, whārangi 121–123 (PDF 125–127), with Table 1 on page 13. I tirohia 26 Sept 2026.
Ngā taputapu e pānui ana i tērā:
Tātaitai rahi taura, Tātaitai fault rating taura, Arotake ara iahiko o nāianei me Trip curve MCB me te rohe taura.
E whakahuahia ana e 2
Ngā aratohu me ngā whārangi ako e whakahua ana i tēnei (56)
- GuideHomeowner shed supply voltage drop over 60 m
- GuideLighting circuit loop impedance, B curve 10 A
- GuideVoltage drop single phase vs three phase
- GuideCable tray fill for a plant room: a second tier
- GuideSwitchboard fault rating at 25 kA for 1 s
- GuideHot water cylinder cable size for a 3 kW element
- GuideConsumer mains fault withstand for 16 mm² copper
- GuideHow many amps can 1.5 mm² cable carry?
- GuideHow many amps can 10 mm² cable carry?
- GuideHow many amps can 16 mm² cable carry?
- GuideHow many amps can 2.5 mm² cable carry?
- GuideHow many amps can 6 mm² cable carry?
- GuideVoltage drop on 2.5 mm² over 30 m
- GuideWhat size cable for a 22 kW EV charger?
- GuideWhat size cable for a 25 A circuit?
- GuideWhat size cable for a lighting circuit in NZ?
- GuideWhat size cable for power points in NZ?
- GuideSubmain voltage drop estimate for a 160 A tender
- GuideMax cable length for a 20 A C curve subcircuit
- GuideSubmain cable size for 3-phase 100 A over 60 m
- Guide24 V DC voltage drop on an instrument loop
- GuideFault level at a sub-board, 300 kVA transformer
- GuideThree circuits in a hot ceiling: correction factor
- GuideWhat size breaker for 4 mm² cable
- GuideTotal voltage drop: mains, submain and final
- GuideOff-grid battery bank autonomy at 48 V
- GuideCable size for a 20 A heat pump circuit in summer
- GuideAmpSize vs jCalc vs free cable sizing tools
- GuideEV charger cable size for a 7 kW 32 A circuit
- GuideAS/NZS 3008.1.2 Table 52: the k factor
- GuideAS/NZS 3008.1.2 Tables 22 to 29: derating
- GuideAS/NZS 3008.1.1 vs 3008.1.2: AU and NZ conditions
- GuideAS/NZS 3008.1.2 Tables 4 to 21: current ratings
- GuideAS/NZS 3008 Table 13 (now 3.18): multicore ratings
- GuideAS/NZS 3008 Table 22 (now 3.33): bunched grouping
- GuideAS/NZS 3008 Table 27 (now 3.44, 3.45): temperature
- GuideAS/NZS 3008 vs BS 7671: cable sizing compared
- GuideAWG and the NEC for NZ and AU electricians
- GuideMotor full load current: 11 kW 400 V DOL
- GuideProspective fault current at a main switchboard
- GuideAS/NZS 3000 Table 8.1: max Zs by curve and rating
- GuideVoltage rise for a 5 kW solar inverter cable
- GuideAS/NZS 3000 Clause 3.6.2: voltage drop limit
- GuideCable size for a 32 A single-phase 25 m run
- GuideVoltage drop with the mV/A·m method
- LearnConduit fill and installation methods
- LearnCurrent-carrying capacity and derating
- LearnVoltage drop basics
- LearnCable tray fill: one layer, tiers and grouping
- LearnChecking an existing circuit
- LearnCorrection factors in the 2017 and 2025 editions
- LearnIB ≤ IN ≤ IZ: the overload rule on a 32 A circuit
- LearnShort-circuit withstand and the k factor
- LearnUnderground cables and civil interfaces
- LearnHarmonics and neutral sizing
- LearnProspective fault current at a board