埋地电缆埋深计算器
埋地电缆的覆土深度及分隔要求。
Reads AS/NZS 3000:2018. Tables checked 26 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。
- Bury a cable out to a shedThe depth of cover for a sheathed cable in heavy duty conduit.
- Bury a cable under a drivewayThe depth of cover under 75 mm of concrete.
- Bury a cable directThe category and depth for an armoured cable buried direct.
- Cross a water pipeThe separation from a water pipe of DN65 or less.
- Run a cable beside a gas pipeThe separation from a gas service.
- Bury a cable near an earth electrodeThe separation a conductive enclosure needs from the electrode.
- Run a conduit under a slabThe cover a conduit needs within a building.
输入
使用默认输入值的示例计算。
- 电缆类型
- 绝缘并带护套的导体
- 防护方式
- 直埋，无护套
- 位置
- 其他位置，建筑物外部
- 表面覆层
- 无覆盖层，或混凝土厚度不足 75 mm
- 最近的其他管线
- 附近无其他管线
- 靠近接地极
- 否
最小覆土深度
500mm
- 布线系统类别
- B
- 警示带深度
- 250mm
- 垫层和覆盖材料
- 50mm
此结果仅供设计参考。请对照现行标准进行核验。
计算步骤
- 布线系统类别B
AS/NZS 3000:2018 Table 3.5
- 最小覆土深度结果500mm
AS/NZS 3000:2018 Table 3.6
- 标识带埋深250mm
AS/NZS 3000:2018 Cl 3.11.4.5
- 下方垫层和上方覆盖层50mm
AS/NZS 3000:2018 Cl 3.11.4.2
- 与其他管线的一般间距100mm
AS/NZS 3000:2018 Table 3.7
关于此计算器
How this is calculated
The tool gives the rules for a buried cable. It reads Section 3 of AS/NZS 3000:2018. It does not size the conductor.
- Category. You pick the cable type and the enclosure. The tool finds the wiring system category from Table 3.5.
- Depth of cover. It reads the minimum depth of cover for the category, the location and any concrete covering from Table 3.6.
- Marker tape. It gives the depth for the marker tape (Cl 3.11.4.5).
- Bedding. It gives the bedding below and the cover material above the cable (Cl 3.11.4.2).
- Separation. It gives the spacing from other services (Table 3.7). You can pick a gas, water, drainage or telecommunications service.
- Protection. For category B it names the additional mechanical protection (Cl 3.11.4.3).
| Step | Table or clause | What it decides |
|---|---|---|
| Category | Table 3.5 | The wiring system category |
| Depth of cover | Table 3.6 | The least cover |
| Marker tape | Cl 3.11.4.5 | The tape depth |
| Bedding | Cl 3.11.4.2 | The bedding and cover material |
| Separation | Table 3.7 | The spacing from other services |
Worked example
- Insulated and sheathed cable buried direct, outside a building. The tool gives category B. The minimum depth of cover is 500 mm. The marker tape sits at 250 mm. The bedding and cover is 50 mm. Category B also needs mechanical protection above the cable.
Limits
- The tool reads AS/NZS 3000. It does not read the rules of the network company or the council.
- It does not size the cable. Use the cable size calculator for the conductor.
- The form has a field for a cable near an earth electrode. Read the clause for that case.
See also: Underground cables and civil interfaces, Voltage rise on a long rural PV run and Voltage drop.
问题
结果仅供设计参考。请依据现行标准核对。
埋地电缆工具有什么作用？
工具读取与您的电缆类型和保护方式对应的布线系统类别。然后报告该位置及地面覆盖层所需的最小覆土深度。它还报告敷设床层深度、标识带深度，以及与其他地下管线的间距。
结果来自哪些表格？
类别取自 AS/NZS 3000:2018 Table 3.5。覆土深度取自 Table 3.6。间距取自 Table 3.7。垫层、机械防护及标识带深度取自 Clauses 3.11.4.2、3.11.4.3 和 3.11.4.5。
新西兰埋地电缆须埋多深？
这取决于类别和地表情况。位于建筑物以外的 A 类或 B 类系统，若上方无混凝土，须有 500 mm 覆土；若上方为厚度至少 75 mm 的现浇混凝土，则覆土 300 mm 即可。C 类系统需 50 mm。
B 类对沟槽意味着什么？
B 类需在电缆上方增设机械防护。本工具会给出相应规定。防护件距布线系统上方不超过 75 mm，宽度至少为 150 mm，两侧各搭接至少 40 mm。垫层为 50 mm 的松散土壤或砂。
为何某种组合被标记为不允许？
Table 3.5 对部分电缆与外壳组合标注 NP。例如无护套导体直接埋入土壤即属此类。本工具将该组合报告为不合格，且不给出埋深。请选择其他外壳或其他电缆类型。
计算示例
背景
本工具读取的条款和表格
- AS/NZS 3000:2018 Cl 3.11.4Underground installation requirements
- AS/NZS 3000:2018 Cl 3.11.4.2Underground bedding and cover
- AS/NZS 3000:2018 Cl 3.11.4.3Underground mechanical protection
- AS/NZS 3000:2018 Cl 3.11.4.5Underground marker tape
- AS/NZS 3000:2018 Cl 3.11.5Distance to other services underground
- AS/NZS 3000:2018 Table 3.5Underground wiring system categories by cable type and method of protection
- AS/NZS 3000:2018 Table 3.6Underground wiring systems minimum depth of cover
- AS/NZS 3000:2018 Table 3.7Minimum separation of underground services
表格最后核对于 26 Sept 2026。
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有问题，或数值看起来有误？联系我们。