AS/NZS 3000:2018
Table 3.5
Underground wiring system categories by cable type and method of protection
The underground cable tool reads the wiring system category for the cable type and its protection. The category sets the depth of cover.
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Đơn vị: Category A, B, C or NP
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| Cable | Heavy duty conduit | Medium duty encased | Heavy duty fibre cement | Fibre cement encased | Galvanized pipe | Medium duty flexible | Buried direct | Chased in rock |
|---|---|---|---|---|---|---|---|---|
| insulated-unsheathed | A | A | NP | NP | NP | B | NP | NP |
| insulated-sheathed | A | A | A | A | A | B | B | NP |
| armoured-served | A | A | A | A | A | A | A | C |
| neutral-screened-underground | A | A | A | A | A | A | A | NP |
| neutral-screened | A | A | A | A | A | B | B | NP |
| mims-served | A | A | A | A | A | B | B | C |
| al-sheathed-strip-armoured | A | A | A | A | A | B | B | C |