RCD 选型计算器
检查是否需要 RCD，并测试动作时间。
Reads Electricity (Safety) Regulations 2010 and AS/NZS 3000:2018. Tables checked 27 Sept 2026.
尝试一个工程 8
每项工作都会预填示例数值。请替换为您自己的数值。
- Choose the RCD for an EV chargerThe RCD a 32 A home EV charger circuit needs in NZ.
- Check the RCD for house lightingThe RCD a lighting circuit needs in Australia.
- Check the RCD for a classroomThe RCD rule for socket‑outlets in a school.
- Check the RCD for a child-care centreThe 10 mA rule where young children are.
- Check a measured RCD trip timeWhether 28 ms at rated current and 12 ms at five times pass.
- Choose the RCD for a patient areaThe residual current and times for a patient-protection RCD.
- Choose the RCD for a fixed machineWhether a fixed appliance in a workshop needs an RCD.
- Choose the RCD for a vending machineThe RCD rule for a ride or a vending machine.
输入
使用默认输入值的示例计算。
- 国家
- 新西兰
- 安装
- 住宅
- 终端分支回路
- 插座
- 回路额定值
- 20 A
- 插座额定值
- 10 A
- 防护职责
- 电击防护
- 额定剩余电流
- 30 mA
- 检查实测跳闸时间
- 否
附加RCD保护
要求值，30 mA
- 条款要求的额定剩余电流
- 30mA
- 该工况下的最大额定剩余电流
- 30mA
- 额定剩余电流时的限值
- 300ms
- 5 倍额定值时的限值
- 40ms
- 最长切断时间
- 0.4s
此结果仅供设计参考。请对照现行标准进行核验。
计算步骤
- 需要附加保护是
AS/NZS 3000:2018 Cl 2.6.3.3.1
- 条款要求的额定剩余电流30mA
AS/NZS 3000:2018 Cl 2.6.3.3.1
- 该工况的最大额定剩余电流30mA
Electricity (Safety) Regulations 2010 reg 24
- 额定剩余电流时的动作限值300ms
Electricity (Safety) Regulations 2010 reg 24
- 额定剩余电流五倍时的动作限值40ms
Electricity (Safety) Regulations 2010 reg 24
- 最长断开时间0.4s
AS/NZS 3000:2018 Cl 5.7.2
- 在此电流或更低电流下不得跳闸15mA
Electricity (Safety) Regulations 2010 reg 24
关于此计算器
How this is calculated
The tool says whether a circuit needs additional RCD protection. It picks the rated residual current. It can also test a measured trip time against the limits.
- Need. The tool reads the installation and the circuit type. It decides whether Clause 2.6.3.3.1 of AS/NZS 3000:2018 asks for additional protection.
- Rated current. It gives the rated residual current that the clause requires for that circuit.
- Maximum for the duty. In New Zealand you pick the duty: shock, property, patient or children. The tool gives the highest rated residual current for that duty (Electricity (Safety) Regulations 2010 reg 24).
- Trip limits. It gives the trip limit at the rated residual current. It also gives the limit at five times that current (reg 24).
- Disconnection time. It gives the maximum disconnection time (Cl 5.7.2).
- Measured result. If you enter two trip times, the tool compares them with the limits. It also gives the current below which the device must not trip.
| Step | Table or clause | What it decides |
|---|---|---|
| Need for protection | Cl 2.6.3.3.1 | Whether the circuit needs an RCD |
| Rated current and trip limits | Reg 24 | The rating and the trip times by duty |
| Disconnection time | Cl 5.7.2 | The longest time to clear |
Worked example
- Socket‑outlets in a home, tested at 250 ms and 50 ms. The tool requires 30 mA protection. The limits are 300 ms at the rated current and 40 ms at five times it. The 50 ms reading exceeds 40 ms, so the test fails.
Limits
- The tool does not choose a make or model. It does not check discrimination between RCDs.
- It does not test nuisance tripping from earth leakage. A circuit with high leakage needs a site test.
- The type of RCD (A, F or B) comes from the equipment on the circuit. See the learn page on RCD types.
- The tool reads AS/NZS 3000:2018. Check the regulations for later changes.
- Australia caps the circuit and New Zealand caps the socket‑outlet in some cases. Check the hint on the form.
See also: RCD types and where they are required, Testing to Section 8 and Wet area zones.
问题
结果仅供设计参考。请依据现行标准核对。
RCD 选型工具有什么作用？
工具报告所检查的条款是否要求在终端分支回路上使用 RCD 作附加保护。它给出该用途的最大额定剩余电流和最大动作时间。它还将额定电流下及其五倍电流下实测的动作时间与上述限值进行比较。
它采用哪些条款和法规？
新西兰的回路依据 AS/NZS 3000:2018 Clause 2.6.3.3，澳大利亚的回路依据 Clause 2.6.3.2.2 或 Clause 2.6.3.2.3.3。新西兰电动汽车回路若为住宅用途，依据 Clause 7.9.3，否则依据 Clause 7.9.4。住宅 Mode 2 回路还需满足 Clause 2.6.3.3.1 规定的 30 mA。跳闸限值依据《Electricity (Safety) Regulations 2010》reg 24，切断时间依据 Clause 5.7.2。
新西兰 RCD 动作时间的限值是多少？
额定剩余动作电流不超过 30 mA 的人身防护 RCD，在其额定剩余电流下的限值为 300 ms。在该电流的五倍时，限值为 40 ms。财产保护采用额定值不超过 300 mA 的 RCD，其限值为 0.5 s 和 0.15 s。
为何 40 A 回路不显示任何要求？
在澳大利亚，非住宅装置时本工具读取 Clause 2.6.3.2.3.3。该条款适用于额定值为 32 A 或以下的终端分支回路，因此超过该值时本工具不给出结果。Clause 2.6.3.2.2 适用于澳大利亚住宅装置的所有终端分支回路，不论额定值。新西兰住宅条款同样没有额定值上限。
本工具是否涵盖医疗及患者区域？
仅部分适用。工具报告法规第 24 条规定的 10 mA 患者限值。它不适用 AS/NZS 3003 患者区域标准。在医疗场所请阅读该标准。工具依据 Amendment 1 读取 AS/NZS 3000。EV 及澳大利亚住宅各行读取修订 1 至 3 的汇编版本。修订 2 修改了 Clause 2.6.3 的部分内容；请核对其现行文本。
计算示例
- RCD tripping with no fault: add up the leakageAn RCD on a home office and kitchen trips with no fault found. Add up the standing leakage, check it against a third of 30 mA, and split it over two RCDs.
- Kitchen power points and the cooktop zonePlace power points and switches near a cooktop, an outdoor gas bottle and a gas vent. Check each distance to AS/NZS 3000 and hand the sink to the wet area tool.
- RCD arrangement for a house boardCheck a New Zealand house board of eight circuits on two RCDs. See what fails with a fourth circuit on one RCD or both lights on one, and the AU change.
- Wire a bathroom: zones, IP ratings and the RCDA New Zealand bathroom with a 1.6 m bath and an open shower, worked through the AS/NZS 3000 Section 6 zones, the IP each item needs, the RCD and bonding.
背景
- 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.
- Damp situations: the Section 6 zonesHow AS/NZS 3000 Section 6 zones the space around baths, showers, basins, spas, pools, fountains and saunas, how to read an IP code, and what A2 changed.
- RCD types and where they are requiredType AC, A, F and B, what each one detects, and the clauses that place them. The fault path behind them, worked on a 20 A circuit over 25 m.
本工具读取的条款和表格
- AS/NZS 3000:2018 Cl 2.6.3.2.2Additional protection in Australia, domestic and residential
- AS/NZS 3000:2018 Cl 2.6.3.2.3.3Additional protection in Australia, non‑domestic
- AS/NZS 3000:2018 Cl 2.6.3.3.1Additional protection in New Zealand, residential
- AS/NZS 3000:2018 Cl 2.6.3.3.2Additional protection in New Zealand, non‑residential
- AS/NZS 3000:2018 Cl 5.7.2Disconnection times
- AS/NZS 3000:2018 Cl 7.9.1Scope of Clause 7.9, electric vehicle supplies
- AS/NZS 3000:2018 Cl 7.9.3.2Mode 2 electric vehicle charging, New Zealand
- AS/NZS 3000:2018 Cl 7.9.3.3Mode 3 and Mode 4 electric vehicle charging, New Zealand
表格最后核对于 27 Sept 2026。
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