Downlight clearance check
IC, CA90 o Non‑IC: puwede bang dumikit ang insulation sa ilaw?
Reads AS/NZS 3000:2018. Tables checked 1 Oct 2026.
Subukan ang isang job 4
Nilalagyan ng halimbawang value ang bawat job. Palitan ang mga ito ng sarili mong value.
- 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.
Mga input
Worked example gamit ang mga default na input.
- Bansa
- New Zealand
- Installation
- Residential
- Marking sa luminaire
- IC-4
- Rating ng lamp
- 10 W
- Insulation ng kisame
- Insulation sa ibabaw
- Sa maa-access na roof space
- Oo
Ang luminaire na ito
Pinapayagan
- Maaaring dumikit dito ang insulation
- Oo
- Maaaring takpan ito ng insulation
- Oo
- Limitasyon sa gilid at tuktok na ibabaw
- 90°C
- Warning sign para sa roof space
- Hindi kailangan
Design aid lang ang resultang ito. I-verify ito laban sa kasalukuyang standard.
Mga hakbang ng kalkulasyon
- KlaseIC-4
AS/NZS 3000:2018 Table 4.3
- Pinapayagan sa installation na itoOo
AS/NZS 3000:2018 Cl 4.5.2.3.5(b)(i)
- Maaaring dumikit dito ang insulationOo
AS/NZS 3000:2018 Table 4.3
- Maaaring takpan ito ng insulationOo
AS/NZS 3000:2018 Table 4.3
- Limitasyon sa gilid at tuktok na ibabaw90°C
AS/NZS 3000:2018 Table 4.3
- Warning sign sa roof spaceHindi kailangan
AS/NZS 3000:2018 Cl 4.5.2.3.2
Tungkol sa calculator na ito
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.
Mga tanong
Design aid ang resulta. I-verify ito laban sa kasalukuyang standard.
Puwede bang takpan ng insulation ang downlight?
Ang IC o IC-4 downlight lang. Sinubukan ang mga ito para ma-cover ng building insulation. Ang CA90 o CA135 ay maaaring may insulation sa gilid nito, pero hindi sa ibabaw. Ang ibang class ay kailangang may insulation na nakalayo.
Anong clearance ang kailangan ng downlight mula sa insulation?
Kapag walang ibinibigay ang maker, itinatakda ng AS/NZS 3000 Figure 4.9 ang mga default para sa lampara hanggang 100 W: 100 mm sa insulation, 100 mm sa building elements, 100 mm sa itaas, at 50 mm sa control gear. Nakadepende sa class kung alin ang nalalapat.
Anong downlight ang puwede sa bahay sa New Zealand?
CA90, CA135, IC at IC-4. Hindi puwede sa New Zealand residential installation ang Non‑IC at Do-not-cover. Sa Australia, puwedeng gamitin sa bahay ang Do-not-cover, CA90, IC at IC-4, at walang CA135.
Ang downlight ko ay may markang IC-F. Ano ito?
Marking mula sa 2001 standard. Pinapayagan ng AS/NZS 3000 na ituring na IC-4 ang IC-F downlight, at CA90 ang CA 80. Binabasa ito ng tool sa ganitong paraan para sa lumang marking.
Kailan kailangan ng warning sign ang roof space?
Kapag nasa accessible roof space ang recessed luminaire, maliban kung lahat sila ay IC o IC-4. Nakalagay ang sign sa access point, kung saan ito makikita ng taong papasok.
Mga worked example
Background
Mga clause at table na binabasa ng tool na ito
- 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
Bawat clause at table, kasama kung paano ito na-verify
Huling na-check ang mga table noong 1 Oct 2026.
Mga kaugnay na tool
- Correction factor calculatorRead each correction factor and the rating a cable needs.AS/NZS 3008.1.2AS/NZS 3008.1.1AS/NZS 3000
- Lighting lumen method calculatorLuminaire count and grid for a room by the lumen method.AS/NZS 1680.1AS/NZS 1158.1.2
- Cable size calculatorFind the smallest cable size that passes each check.AS/NZS 3008.1.2AS/NZS 3008.1.1AS/NZS 3000
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