线管填充率计算器
检查电缆束能否放入线管。
Reads AS/NZS 3000:2018. Tables checked 19 Sept 2026.
尝试一个工程 7
每项工作都会预填示例数值。请替换为您自己的数值。
- 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.
输入
使用默认输入值的示例计算。
- 国家
- 新西兰
- 线管规格
- 32 mm
- 电缆
- 2 行
线管填充率
97.66%
- 允许填充率
- 40%
- 推荐导管
- 50mm
- 导管内部面积
- 539.13mm²
- 电缆截面积
- 526.52mm²
此结果仅供设计参考。请对照现行标准进行核验。
计算步骤
- 线管内截面积539.13mm²
AS/NZS 2053 / AS/NZS 5000 manufacturer data (derived)
- 电缆截面积526.52mm²
AS/NZS 2053 / AS/NZS 5000 manufacturer data (derived)
- 填充率（百分比）结果97.66%
AS/NZS 3000:2018 App C Para C6.2; Tables C10–C12 give a maximum-count guide
- 推荐线管50mm
关于此计算器
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.
问题
结果仅供设计参考。请依据现行标准核对。
线管填充率计算器有什么作用？
工具逐根累加整束电缆的截面积。将该总和除以线管的内部面积，得出线管填充率百分比。它将填充率与允许限值进行比较，并建议能容纳该束电缆的最小公称线管。
工具采用什么填充率限值？
工具对一根电缆采用 50%，两根电缆采用 33%，三根或以上采用 40%。这些是 AS/NZS 3000:2018 Appendix C、段落 C6.2 中的空间系数。同一附录的 Tables C10 至 C12 则给出最大根数的方法。
哪些输入最重要？
线管的公称尺寸决定其内部面积。导体截面、芯数和电缆根数决定电缆所占面积。在相同导体截面下，单芯电缆与多芯电缆的外径不同。因此，所选芯数会改变结果。
常见的注意事项有哪些？
工具采用填充率方法，而非根数方法。外径取自制造商数据，因品牌而异。未考虑弯头和穿线拉力。线管尺寸及电缆条目保存在页面地址中，因此链接可重现该束电缆。
计算示例
- 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.
背景
- 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.
本工具读取的条款和表格
- 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
表格最后核对于 19 Sept 2026。
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