筒灯净距检查
IC、CA90 或 Non‑IC：绝缘材料可以接触灯具吗？
Reads AS/NZS 3000:2018. Tables checked 1 Oct 2026.
尝试一个工程 4
每项工作都会预填示例数值。请替换为您自己的数值。
- Check a CA90 downlight against insulationA CA90 light with insulation against its sides, and its clearances.
- Read an old IC-F downlightAn IC-F marking read as IC-4 under insulation.
- Check a CA135 downlight in AustraliaA CA135 light in an Australian home.
- Check a Non‑IC light in a shopA 50 W Non‑IC downlight with insulation kept clear.
输入
使用默认输入值的示例计算。
- 国家
- 新西兰
- 安装
- 住宅
- 灯具上的标识
- IC-4
- 灯额定值
- 10 W
- 天花板保温
- 顶部绝缘
- 位于可进入的屋顶空间内
- 是
此处这个灯具
允许
- 绝缘可与其相接
- 是
- 绝缘可覆盖其表面
- 是
- 侧面和顶面限值
- 90°C
- 屋顶空间警示标志
- 不需要
此结果仅供设计参考。请对照现行标准进行核验。
计算步骤
- 类别IC-4
AS/NZS 3000:2018 Table 4.3
- 本装置中允许是
AS/NZS 3000:2018 Cl 4.5.2.3.5(b)(i)
- 绝缘可与其相接是
AS/NZS 3000:2018 Table 4.3
- 绝缘可覆盖其表面是
AS/NZS 3000:2018 Table 4.3
- 侧面和顶面限值90°C
AS/NZS 3000:2018 Table 4.3
- 屋顶空间警示标志不需要
AS/NZS 3000:2018 Cl 4.5.2.3.2
关于此计算器
How this is calculated
A recessed luminaire, usually a downlight, sits in the ceiling with its body in the roof space. Its heat has to go somewhere, so AS/NZS 3000 sets which classes may go where and how close insulation may come. The class is the symbol on the luminaire or its box.
The tool first reads the marking. A luminaire marked to the 2001 standard is read as its current class: an IC-F as IC-4, a CA 80 as CA90. Then it checks the class against the list for your country and installation. A New Zealand home may take CA90, CA135, IC and IC-4. An Australian home may take Do-not-cover, CA90, IC and IC-4. Other buildings add Non‑IC and Do-not-cover, and New Zealand adds CA135.
Next it checks the insulation you plan against the class. IC and IC-4 may be covered. CA90 and CA135 may have insulation against their sides but not over the top. Do-not-cover may be near insulation but not touch it. Non‑IC is not tested with insulation, so the tool warns when insulation is present even kept clear.
Where insulation is kept clear and the maker gives no distance, the tool gives the default clearances of the standard for a lamp up to 100 W, for the dimensions its drawing shows for the class. Above 100 W there are no defaults: use the maker's distances or a luminaire certified for the condition. Last, it says whether the roof space needs the warning sign.
| Step | Table or clause | What it decides |
|---|---|---|
| A 2001 marking | Cl 4.5.2.3.5 Exception | The class an old marking is read as |
| The class for this installation | Cl 4.5.2.3.5 | Whether the class may go in this home or building |
| Insulation against or over the luminaire | Table 4.3 | Whether insulation may abut or cover the class |
| Default clearances | Figure 4.9 | The distances where the clearance method is used |
| A lamp over 100 W | Cl 4.5.2.3.3(a)(viii) | Which methods remain |
| The roof space sign | Cl 4.5.2.3.2 | Whether the warning sign is needed |
Worked examples
- A CA90 downlight with insulation against its sides. The luminaire is Permitted in a New Zealand home. Insulation may abut it but not cover it, the space above stays clear, and the roof space needs the sign.
- An old IC-F downlight under insulation. The marking reads as IC-4, so the luminaire is Permitted and may be covered. No sign is needed if every downlight in the space is IC or IC-4.
- A CA135 downlight in an Australian home. The luminaire is Not permitted and fails: CA135 is not on the Australian list for any installation.
- A 50 W Non‑IC downlight in a shop. The luminaire is Permitted in a non‑residential building. Insulation must stay clear by the default clearances, with a fixed guard where it is loose.
- A downlight with no marking. The luminaire is Not permitted and fails: with no class and no stated clearances, it should not be installed.
Limits
The tool reads the class and the clauses. It does not test a luminaire or check the maker's instructions, which take the place of the defaults. It does not size the lighting circuit or check its cable in the insulation; use the correction factors tool for a cable run in insulation. Spotlights that heat the surface they light follow Table 4.2, which the tool does not check.
See also: Downlights and insulation: IC-4, CA90 and Non‑IC, Downlights in an insulated ceiling and Lighting lumen method.
问题
结果仅供设计参考。请依据现行标准核对。
隔热材料可以覆盖筒灯吗？
仅限 IC 或 IC-4 筒灯。这些灯具经测试可被建筑隔热材料覆盖。CA90 或 CA135 灯具的侧面可接触隔热材料，但顶部不可。其他类别需保持隔热材料与灯具之间的间隙。
筒灯与绝缘材料之间需要多大的净距？
若制造商未给出数值，AS/NZS 3000 Figure 4.9 为 100 W 及以下的灯具规定默认值：距绝缘材料 100 mm，距建筑构件 100 mm，上方 100 mm，距控制装置 50 mm。适用哪一项取决于类别。
新西兰住宅可以使用哪些筒灯？
CA90、CA135、IC 和 IC-4。Non‑IC 及 Do-not-cover 不得用于新西兰住宅装置。在澳大利亚，住宅可采用 Do-not-cover、CA90、IC 和 IC-4，但不得采用 CA135。
我的筒灯标有 IC-F，那是什么？
这是 2001 版标准的标识。AS/NZS 3000 允许将 IC-F 筒灯视为 IC-4，将 CA 80 视为 CA90。本工具按此方式读取旧标识。
屋顶空间何时需要警示标志？
嵌入式灯具位于可进入的屋顶空间内，除非所有灯具均为 IC 或 IC-4。标志应设在入口处，进入者可见。
计算示例
背景
本工具读取的条款和表格
- AS/NZS 3000:2018 Cl 4.5.2.3.2Roof space warning sign
- AS/NZS 3000:2018 Cl 4.5.2.3.5Recessed luminaire classes by installation
- AS/NZS 3000:2018 Cl 4.5.2.3, Figure 4.9 and Table 4.3Recessed luminaire classes, where each may go, and the default clearances
表格最后核对于 1 Oct 2026。
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