Tātaitai Whakakī Conduit
Tirohia mēnā ka uru tētahi paihere taura ki tētahi conduit.
Reads AS/NZS 3000:2018. Tables checked 19 Sept 2026.
Whakamātau mahi 7
Ka whakakī ia mahi i ngā uara tauira. Whakakapia ērā ki ō uara.
- Fill a conduitThe space factor of a 4 mm² single core circuit in a 25 mm conduit.
- Fit a submain in a conduitWhether four 16 mm² singles fit in a 32 mm conduit.
- Fit two flat cables in a conduitWhether two 2.5 mm² twin and earth cables fit in 20 mm.
- Fit PV string cablesWhether six 6 mm² singles fit in a 32 mm conduit.
- Fit a 35 mm² submainWhether four 35 mm² singles fit in a 50 mm conduit.
- Fit a motor circuitWhether four 6 mm² singles fit in a 25 mm conduit.
- Fit cables in an Australian conduitWhether four 4 mm² singles fit in a 25 mm conduit on the Australian sizes.
Ngā whakauru
He tauira mahi me ngā whakauru taunoa.
- Whenua
- Aotearoa
- Rahi conduit
- 32 mm
- Ngā taura
- 2 rārangi
Whakakī Conduit
97.66%
- Whakakī e whakaaetia ana
- 40%
- Kōpuka e tūtohuhia ana
- 50mm
- Rohe o roto o te kōpuka
- 539.13mm²
- Rohe waea
- 526.52mm²
He āwhina hoahoa tēnei hua. Manatokohia ki te paerewa o nāianei.
Ngā hīkoi tātaitanga
- Wāhi roto o te ara kaikawe539.13mm²
AS/NZS 2053 / AS/NZS 5000 manufacturer data (derived)
- Rohe waea526.52mm²
AS/NZS 2053 / AS/NZS 5000 manufacturer data (derived)
- Ōrau whakakīHua97.66%
AS/NZS 3000:2018 App C Para C6.2; Tables C10–C12 give a maximum-count guide
- Kōpuka hiko e tūtohutia ana50mm
Mō tēnei tātaitai
How this is calculated
The tool checks that a bundle of cables fits in a conduit. It uses the fill percentage method of Paragraph C6.2 in Appendix C of AS/NZS 3000:2018. Appendix C also holds Tables C10 to C12, which list a maximum count of cables instead.
- Conduit area. The tool reads the internal area of the conduit size you pick. The data comes from the maker and AS/NZS 2053 sizes. The AmpSize hub marks this value as derived.
- Cable area. It reads the overall area of each cable by size and cores. It multiplies by the count and adds the rows.
- Fill percent. It divides the cable area by the conduit area.
- Permitted fill. It applies the space factor of Paragraph C6.2. The factor is 50 % for one cable and 33 % for two. It is 40 % for three or more.
- Result. The tool passes the bundle when the fill is at or below the permitted figure. It gives the smallest conduit that passes.
| Step | Table or clause | What it decides |
|---|---|---|
| Fill percent | AS/NZS 3000 App C Para C6.2 | The space factor for the bundle |
| Maximum count | AS/NZS 3000 Tables C10 to C12 | A guide by cable count |
Worked example
- 4 single‑core cables of 6 mm² in a 25 mm conduit. The cables take 81.71 mm² of a 301.72 mm² conduit. The fill is 27.08 % against a 40 % limit. The bundle passes.
Limits
- The tool does not model bends, pull length or the pulling tension. A long or bent run needs a bigger conduit.
- It does not apply a derating for cables in conduit. Use the correction factors calculator for that.
- It reads one conduit. It does not check a trunking or a cable tray.
- The conduit areas are maker data, not a Standard value. Check them against the conduit you buy.
See also: Conduit fill and installation methods, Conduit fill for 4 x 6 mm² in 25 mm and Appendix C conduit space factor.
Pātai
He āwhina hoahoa te hua. Manatokohia ki te paerewa o nāianei.
He aha te mahi a te tātaitai whakakī conduit?
Ka tapiri te taputapu i ngā wāhi whakawhiti whārahi, taura ia taura, mō te bundle katoa. Ka wehea taua tapeke ki te wāhi roto o te conduit kia riro ai te ōrau whakakī. Ka whakataurite i te whakakī ki te tepe whakaaetanga, ā, ka tohutohu i te conduit nominal iti rawa e uru ana ki te bundle.
Ko tēhea tepe whakakī e whakamahia ana e te taputapu?
Ka whakamahi te taputapu i te 50 ōrau mō tētahi taura kotahi, 33 ōrau mō ngā taura e rua, ā, 40 ōrau mō te toru, neke atu rānei. Ko ēnei ngā space factors i AS/NZS 3000:2018 Appendix C, Paragraph C6.2. Ko Tables C10 ki C12 o taua Appendix e tuku ana i te tikanga tatau taura nui rawa hei utu.
Ko ēhea ngā uruhanga e tino nui ana?
Ko te rahi conduit nominal e whakatau ana i te horahanga roto. Ko te rahi kaikawe, te tatau core me te tatau taura e whakatau ana i te horahanga taura. I te rahi kaikawe ōrite, he rerekē ngā diameter katoa o te taura core kotahi me te taura multicore. Nō reira ka rerekē te hua ina whiriwhiria te core.
He aha ngā raru noa?
Ka whakamahi te taputapu i te tikanga ōrau whakakī, ehara i te tikanga tatau taura. Ka ahu mai ngā diameter katoa i ngā raraunga kaihanga, ka rerekē i ia waitohu. Kāore e hoahoatia ngā piko me te draw in force. Ka noho te rahi conduit me ngā rārangi taura ki te wāhitau o te whārangi, nō reira ka whakaatu tētahi hononga i te bundle.
Ngā tauira mahi
- Cable 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.
- AS/NZS 3000 Appendix C: conduit space factorWhat the conduit space factor in AS/NZS 3000 Appendix C governs, which tool reads it, and a worked 50 mm conduit that reaches 52.95 % fill against a 40 % limit.
- Conduit fill: 4 x 6 mm² singles in 25 mmFour 6 mm² single‑core cables in 25 mm conduit, with the fill percent, the space factor and the smallest conduit the tool recommends for the bundle.
Kōrero o muri
- Conduit fill and installation methodsHow the conduit space factor works, what the fill percent means against the 40 % limit, and how the install method names on site map to the 3008 columns.
- Underground cables and civil interfacesBurial categories, depth of cover, bedding and separation for underground cables, with a worked 100 A submain that changes size when the trench changes.
Ngā Clause me ngā Table e pānuitia ana e tēnei taputapu
- AS/NZS 3000:2018 App C Para C6.2Cables in enclosures
- AS/NZS 3000:2018 Tables C10 to C12Maximum cable counts in conduit
- AS/NZS 2053 heavy-duty conduit (manufacturer data)Conduit internal diameters
- AS/NZS 5000.1 cables, manufacturer dataCable overall diameters
Ia Clause me Table, me te pēhea i manatokotia ai ia tētahi
Ngā tūtohi i arotakehia whakamutunga i te 19 Sept 2026.
Ngā taputapu hononga
- Tātaitai rahi tauraFind the smallest cable size that passes each check.AS/NZS 3008.1.2AS/NZS 3008.1.1AS/NZS 3000
- Whakakī cable tray me te ladderTray or ladder width, tiers, kg/m and the grouping factor.AS/NZS 3008.1
- Tātaitai hōhonu taura i raro i te whenuaDepth of cover and separation for a buried cable.AS/NZS 3000
He whai hua tēnei?
He pātai, he uara rānei e kitea ana he hē? Whakapā mai.