AS/NZS 3000:2018
Table 3.6
Underground wiring systems minimum depth of cover
The underground cable tool reads the minimum depth of cover for the category and the location.
已核验：对照印刷版标准阅读，页码 197。检查于 26 Sept 2026。
单位：Cat A mm, Cat B mm, Cat C mm
这些是 AmpSize 所编码的数值。不转载标准原文。请依据现行标准核对。
4 行
| Location | Covering | Cat A (mm) | Cat B (mm) | Cat C (mm) |
|---|---|---|---|---|
| within-building | concrete-75 | 0 | 0 | 0 |
| within-building | none | 500 | 500 | 50 |
| elsewhere | concrete-75 | 300 | 300 | 50 |
| elsewhere | none | 500 | 500 | 50 |