Tātaitai hōhonu taura i raro i te whenua
Te oneone ki runga me te wehenga mō tētahi taura nehua.
Reads AS/NZS 3000:2018. Tables checked 26 Sept 2026.
Whakamātau mahi 7
Ka whakakī ia mahi i ngā uara tauira. Whakakapia ērā ki ō uara.
- 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.
Ngā whakauru
He tauira mahi me ngā whakauru taunoa.
- Momo waea
- Kaikawe whakamaherehia, kua kapi
- Tikanga whakamarumaru
- Tanu tōtika, kāore he takotoranga
- Wāhi
- Wāhi kē, i waho o te whare
- Kapi o te mata
- Kāore he hipoki, rānei he konaraka iti iho i te 75 mm
- Ratonga kē e tata ana
- Kāore he ratonga kē e tata ana
- Tata ki te kaiwhakawhenua whenua
- Kāo
Hōhonutanga hipoki iti rawa
500mm
- Karaehe pūnaha waea
- B
- Hōhonutanga tāpui tohu
- 250mm
- Rawa tūru me te kapi
- 50mm
He āwhina hoahoa tēnei hua. Manatokohia ki te paerewa o nāianei.
Ngā hīkoi tātaitanga
- Momo pūnaha uauaB
AS/NZS 3000:2018 Table 3.5
- Hōhonu iti rawa o te hipokiHua500mm
AS/NZS 3000:2018 Table 3.6
- Hōhonu o te kaimaka tohu250mm
AS/NZS 3000:2018 Cl 3.11.4.5
- Tūru i raro, kapi i runga50mm
AS/NZS 3000:2018 Cl 3.11.4.2
- Wātea whānui mai i ētahi atu ratonga100mm
AS/NZS 3000:2018 Table 3.7
Mō tēnei tātaitai
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.
Pātai
He āwhina hoahoa te hua. Manatokohia ki te paerewa o nāianei.
He aha te mahi a te taputapu Taura i Raro i te Whenua?
Ka pānui te taputapu i te karaehe pūnaha waea mō tō momo taura me tō tikanga whakamaru. Kātahi ka whakaatu i te hōhonu oneone ki runga iti rawa mō te wāhi me te whakakapinga papa. Ka whakaatu anō i te hōhonu bedding, te hōhonu marker tape me te wehenga mai i tētahi ratonga kē i raro i te whenua.
Ko ēhea ngā tūtohi e ahu mai ai te putanga?
Ka ahu mai te karaehe i AS/NZS 3000:2018 Table 3.5. Ka ahu mai te hōhonu oneone ki runga i Table 3.6. Ka ahu mai te wehenga i Table 3.7. Ka ahu mai te bedding, te whakamaru ā-miihini me te hōhonu marker tape i Clauses 3.11.4.2, 3.11.4.3 me 3.11.4.5.
He hōhonu pēhea me whai tētahi taura i raro i te whenua i Aotearoa?
Ka whakawhirinaki ki te karaehe me te mata. Ko tētahi pūnaha Category A, B rānei kei wāhi kē atu i tētahi whare, me 500 mm te oneone ki runga, kāore he raima ki runga, me 300 mm rānei i raro i te raima kua ringihia, 75 mm te matotoru i te iti rawa. Ko tētahi pūnaha Category C, me 50 mm.
He aha te tikanga o Category B mō te awaawa?
Me whai whakamarutanga matatika āpiti i runga i te taura mō Category B. Ka pūrongo te taputapu i te ture. Ka noho te whakamarutanga kāore neke atu i te 75 mm i runga i te pūnaha waea, ā, he 150 mm te whānui iti rawa. Ka kapi ia taha i te 40 mm te iti rawa. Ko te moenga he 50 mm o te oneone pakupaku, o te onepū rānei.
He aha te tohu ai i tētahi takirua hei kāore e whakaaetia?
Ko Table 3.5 e tohu ana i ētahi takirua taura me enclosure hei NP. Tētahi tauira ko ngā kaikawe kāore he sheath e nehua tika ana ki te oneone. Ka pūrongo te taputapu i te takirua hei hinga, kāore he hōhonu e hoatu ana. Kōwhiria tētahi atu enclosure, tētahi atu momo taura rānei.
Ngā tauira mahi
Kōrero o muri
Ngā Clause me ngā Table e pānuitia ana e tēnei taputapu
- 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
Ia Clause me Table, me te pēhea i manatokotia ai ia tētahi
Ngā tūtohi i arotakehia whakamutunga i te 26 Sept 2026.
Ngā taputapu hononga
- Whakawhenua whare o wahoEarth a shed: earth with the submain, or its own MEN.AS/NZS 3000
- Tātaitai rahi tauraFind the smallest cable size that passes each check.AS/NZS 3008.1.2AS/NZS 3008.1.1AS/NZS 3000
- Kaitirotiro segregation and separationCheck what may share an enclosure and the separation.AS/NZS 3000
He whai hua tēnei?
He pātai, he uara rānei e kitea ana he hē? Whakapā mai.