基础级别
读者在首次计算前需要了解的概念：电流、电压降和 MEN 系统。
- 阅读约 4 分钟Conduit fill and installation methodsHow the conduit space factor works, what the fill percent means against the 40 percent limit, and how the install method names on site map to the 3008 columns.
- 阅读约 5 分钟Current-carrying capacity and deratingWhy one cable size has many ratings. Install method, ambient, grouping, soil and depth, with a 25 A circuit that needs 10 mm² once the factors apply.
- 阅读约 3 分钟Downlights and insulation: IC-4, CA90 and Non‑ICThe six recessed luminaire classes, what insulation may do around each, which a NZ or AU home may have, the default clearances, and the roof space warning sign.
- 阅读约 3 分钟Home batteries and AS/NZS 5139How a home solar battery is sized in kWh, what usable, nominal, depth of discharge and round-trip efficiency mean, and where AS/NZS 5139 lets one go.
- 阅读约 4 分钟Home battery location and clearancesWhere AS/NZS 5139 lets an all-in-one home battery go. Restricted places, 600 and 900 mm zones, the habitable room barrier, ceiling, IP codes and working space.
- 阅读约 3 分钟How many circuits can go on one RCDThe AS/NZS 3000 Cl 2.6.2.4 arrangement rules in plain words, which circuits need a 30 mA RCD in NZ and AU homes, how RCBOs count, and why the rules exist.
- 阅读约 3 分钟IP ratings explained: each digit and letterWhat the two numerals of an IP code mean, what X, the letters A to D and H, M, S, W add, why IP67 is not better than IP65 for jets, and where 3000 sets a code.
- 阅读约 4 分钟MEN system: multiple earthed neutral explainedMEN means multiple earthed neutral. In NZ, earth and neutral join at the main switchboard. A fault on a 32 A C curve circuit then draws 343.8 A and clears.
- 阅读约 6 分钟Ohm's law and power on d.c. and a.c.Ohm's law and the power formulas on d.c., single-phase and three-phase a.c.: how power factor and impedance change them, and how any two values give the rest.
- 阅读约 3 分钟Power points near a cooktop, gas bottle and sinkThe AS/NZS 3000 zones that keep power points, switches and lights away from cooktops, gas cylinders, gas vents and regulators, and where sinks are checked.
- 阅读约 2 分钟Switchboard labels and circuit chartsWhat AS/NZS 3000 asks a switchboard to carry: a chart tying each device to what it supplies, MAIN SWITCH, MAIN SWITCHBOARD, solar labels and marked neutrals.
- 阅读约 3 分钟The 5 % voltage drop limit from supply to loadWhat AS/NZS 3000 Cl 3.6.2 limits, how the drop of the mains, submains and final subcircuits adds by percent, the four exceptions and why any split is yours.
- 阅读约 2 分钟The order of verification testsWhy AS/NZS 3017 tests earth continuity before insulation and loop impedance before RCDs, which circuits take which test, and where each limit comes from.
- 阅读约 4 分钟Voltage drop basicsOhm's law on a cable, the mV/A·m shortcut, the percent limit and the maximum length, worked on a 25 A run over 35 m of 4 mm² copper.
- 阅读约 4 分钟Who may do electrical work in NZThe regulations that govern prescribed electrical work and its certification in New Zealand, named by number, with the paperwork abbreviations explained.
- 阅读约 2 分钟Wire colours in NZ and Australia, old and newThe active, neutral and earth colours of AS/NZS 3000 Table 3.4, the NZ black neutral, older yellow and green conductors, and flexible cord colours.
本指南使用的计算器
- 线管填充率计算器检查电缆束能否放入线管。
- 电缆截面计算器求出通过各项检查的最小电缆截面。
- 筒灯净距检查IC、CA90 或 Non‑IC：绝缘材料可以接触灯具吗？
- 修正系数计算器读取每个修正系数，以及电缆所需的额定值。
- 太阳能储能电池计算器为光伏晚间负荷选型家用储能电池。
- 蓄电池组计算器根据负荷计算蓄电池组容量及续航时间。
- 直流电缆截面计算器按电流和电压降为最高 1500 V 的直流电缆选型。
- 蓄电池位置检查器依据 AS/NZS 5139，检查家用储能电池可以安装在哪里。
- RCD 配置检查检查每个 RCD 的回路数及照明分配。
- RCD 选型计算器检查是否需要 RCD，并测试动作时间。
- IP 防护等级表与解读解读 IP 代码，并求出某位置的最低 IP 要求。
- 潮湿区域分区检查器求出近水区域的 Section 6 分区、IP 及 RCD。
- 接地故障回路阻抗计算器对照最大 Zs 检查接地故障回路阻抗。
- 电缆短路耐受计算器检查导体能否承受故障电流。
- 欧姆定律与功率V、I、R 和 P 中任意两项可求出其余两项。
- 三相功率计算器在功率、电流、电压和功率因数之间换算。
- 满载电流计算器根据功率、电压和相数计算满载电流。
- 插座位置检查灶台、煤气瓶、通风口或水槽附近的插座。
- 配电箱回路一览表制作配电箱回路一览表及其所需标签。
- 配电箱分隔形式检查器检查配电箱的分隔、通道和净距。
- 总电压降计算器将进线、分支干线和终端分支回路的压降相加，并对照 5 %。
- 电压降计算器计算电缆线路的电压降并检查限值。
- 配电箱测试记录表打印配电箱测试单，并列出每项测试的限值。
- 测试结果检查器对照 Section 8 限值，检查实测测试结果。
- 电压升高计算器计算分布式发电或光伏的电压升高。
- 电气认证路径查找新西兰或澳大利亚工程所需的文件。
- 最大需量计算器估算家用或非家用负荷的最大需量。
- 电线颜色指南查找固定布线及软线（新旧均包括）的导线颜色。
- 测试与标签周期便携设备的复测周期和合格限值。