Estimator aratohu
Te utu o tētahi ara taura mai i tōna rahi, me te whakaritenga taura mō tētahi mahi.
- 3 meneti te pānuiCommercial kitchen kW to amps full load currentTurning a 30 kW commercial kitchen nameplate load into 45.58 A at 400 V three phase, with the power factor step that a plain kW to amps sum leaves out.
- 3 meneti te pānuiDairy shed motor current: 15 kW at 400 VFull load current, shaft speed, torque and DOL starting current for a 15 kW 400 V dairy shed vacuum pump motor, worked through the AmpSize motor engine.
- 5 meneti te pānuiWhat size generator for a dairy shedSize a standby set for a dairy shed from its load list. The vacuum pump's start sets the size, then staggered steps, a drive and a soft starter shrink it.
- 5 meneti te pānuiCable tray fill for a plant room: a second tierLay ten multicore cables on a 300 mm perforated tray in one layer, see when it takes a second tier, and carry the grouping factor into the cable size.
- 3 meneti te pānuiGenerator full load current: 200 kVA to ampsA 200 kVA 400 V standby set converted to 288.68 A of full load current, 160 kW of real power and 2,405.63 A of initial fault current from 12 percent reactance.
- 3 meneti te pānuiOffice maximum demand per phase with Table C2An office fitout load schedule assessed against AS/NZS 3000 Table C2, group by group, landing on 413.7 A across three phases and 137.9 A per phase.
- 1 meneti te pānuiHow many amps can 10 mm² cable carry?10 mm² copper multicore PVC cable carries 50 A enclosed in air at 30 °C in NZ, so a 50 A breaker protects it. Clipped direct, it carries 58 A.
- 1 meneti te pānuiHow many amps can 16 mm² cable carry?16 mm² copper multicore PVC cable carries 66 A enclosed in air at 30 °C in NZ, so it takes a 63 A breaker. Grouped with two circuits, it carries 46.2 A.
- 3 meneti te pānuiSubmain voltage drop estimate for a 160 A tenderA price stage check on a 160 A submain over 80 m on 70 mm² XLPE. See the mV/A·m figure, the 1.89 percent drop and the length the budget allows.
- 3 meneti te pānuiSubmain cable size for 3‑phase 100 A over 60 mA 100 A tenancy submain on tray over 60 m at 40 °C. See the derating chain, the four checks and why the loop impedance check sets the size at 70 mm².
- 3 meneti te pānui22 kW EV charger amps at 400 V three‑phaseA 22 kW three-phase EV charger draws 31.75 A at 400 V. See the inputs, the clause, the arithmetic and the current that feeds cable sizing and demand.
- 3 meneti te pānuiGenerator sizing for a 150 kVA holiday parkA 150 kVA three-phase standby set at 400 V gives 216.51 A full load current, 120 kW real power and 1443.38 A fault current from one nameplate.
- 4 meneti te pānuiElectrical estimating calculators NZ roundupA roundup of the calculators a New Zealand estimator uses at price stage, with a Table C2 fitout worked through to a demand of 102.95 A per phase.
- 4 meneti te pānuiAmpSize vs jCalc vs free cable sizing toolsCompare AmpSize with jCalc and other free cable sizing tools. One 63 A three-phase submain shows which checks decide a size, and what AmpSize leaves out.
- 3 meneti te pānuiAS/NZS 3000 Tables C1 and C2: demand groupsWhat the demand group letters govern, when to use Table C1 or Table C2, and a commercial assessment that returns 276.26 A total and 92.09 A per phase.
- 6 meneti te pānuiAS/NZS 3008.1.1 table numbers: 2017 to 2025Each AS/NZS 3008.1.1 table AmpSize reads, with its 2017 number, its 2025 number and whether its values moved, and one submain that cites both sets.
- 4 meneti te pānuiAS/NZS 3008.1.2 Tables 4 to 21: current ratingsWhat the current rating tables govern, which table AmpSize reads today, and a 40 A circuit that lands on 10 mm² with a derated capacity of 50 A.
- 4 meneti te pānuiAS/NZS 3008 Table 13 (now 3.18): multicore ratingsWhat AS/NZS 3008 Table 13 gives, why the 2025 AU part calls it Table 3.18, how to read its columns into the calculator, and what moved for buried cable.
- 3 meneti te pānuiMotor full load current: 11 kW 400 V DOLFull load current, shaft speed, torque and direct on line starting current for an 11 kW four-pole 400 V induction motor, with the figures the tool returns.
- 3 meneti te pānuiCommercial maximum demand with Table C2A tender-stage demand assessment for a commercial building using AS/NZS 3000 Table C2, with each group demand and the per-phase figure the tool returns.
- 5 meneti te pānuiAS/NZS 3008.1.1:2025: what changed from 2017The 2025 AU part adds d.c. ratings to 1500 V, renumbers every table and moves some ratings. Four circuits, each run on both editions, show what moves.
- 4 meneti te pānuiCable size for a 32 A single‑phase 25 m runWork through a 32 A single-phase circuit over 25 metres in New Zealand. See every derating factor, the check that sets the size, and the result the tool gives.
- 4 meneti te pānuiDomestic maximum demand with Table C1Assess the maximum demand of a New Zealand house from Table C1, group by group, with a worked example that lands on 52.61 A on a single-phase supply.
Ngā tātaitai e whakamahia ana e ēnei aratohu
- Tātaitai Iahiko Uta KatoaTātaitia te iahiko uta katoa mai i te mana, te voltage me te wāhanga.
- Tātaitai mōtāKimihia te iahiko uta katoa mōtā, te iahiko tīmata me te torque.
- Rahi generator mai i tētahi Rārangi UtaWhakaritea te rahi o tētahi generator mai i tētahi rārangi uta me te tīmatanga mōtā.
- Whakakī cable tray me te ladderTe whānui o te tray, te ladder, ngā tiers, kg/m me te tauwehe whakarōpū.
- Tātaitai iahiko generatorTe iahiko uta katoa me te iahiko hapa o tētahi generator mai i tōna kVA.
- Tātaitai Maximum DemandTātaungia te maximum demand mō ngā uta kāinga, uta kāore kāinga rānei.
- Arotake ara iahiko o nāianeiTirohia tētahi ara iahiko kua whakatūria: te taura, te taputapu, te heke me te Zs.
- Tātaitai heke voltageTātaitia te heke voltage i tētahi ara taura, ā, tirohia te rohe.
- Tātaitai rahi tauraKimihia te rahi taura iti rawa e pass ana i ia arotake.