Tātaitai roa taura ngāwari i te wāhi hanga
Te roa rawa o te taura ngāwari, o te taura rānei ka taea te rere i tētahi wāhi hanga.
Reads AS/NZS 3012:2019. Tables checked 1 Oct 2026.
Whakamātau mahi 5
Ka whakakī ia mahi i ngā uara tauira. Whakakapia ērā ki ō uara.
- Check the length of a site leadWhether a 50 m, 15 A lead of 2.5 mm² is in the limit on site.
- Check a light-duty site leadWhether a 25 m, 10 A lead of 1.0 mm² is in the limit.
- Check two leads joinedWhether two joined leads stay in the limit.
- Check a coiled leadWhat a coiled lead does to the limit.
- Check a lead from a socket assemblyA lead that runs from a portable socket‑outlet assembly.
Ngā whakauru
He tauira mahi me ngā whakauru taunoa.
- Au reitia
- 10 A
- Rohe kaikawe
- 2.5 mm²
- Taura
- Kotahi wāhanga, 3 kōwae
- Whakamahi
- Whakamahinga whānui, pēnei i ngā wiri, ngā kaiwhakamaru me ngā taraitara
- Te roa katoa mai i te socket-outlet ki te taputapu
- 40 m
- Uaua puna PSOA
- 0 m
- Heke whakahiato e whakamahia ana e te uaua pūmau i mua i te pūrere
- 0 %
- E rua, neke atu rānei ngā pūtau toronga kua hono
- Kāo
- Ka whakamahia te taura porowhita, i runga rānei i te rīra
- Kāo
Roa nui rawa
60m
- Roa kua tirohia
- 40m
- Uaua puna PSOA
- 0m
- Kei roto i te rohe
- Āe
- Heke hiko e ahu ana te roa
- 5%
- Heke hiko kua whakamahia kē i runga ake
- 0%
- Heke whakahiato katoa i te taputapu
- 5%
- Tohutoro
- AS/NZS 3012:2019 Table 1
He āwhina hoahoa tēnei hua. Manatokohia ki te paerewa o nāianei.
Ngā hīkoi tātaitanga
- Roa kua whakauru40m
AS/NZS 3012:2019 Table 1
- Uaua utanga PSOA0m
AS/NZS 3012:2019 Cl 2.6.10(b)
- Roa kua tirohia ki Table 140m
AS/NZS 3012:2019 Table 1
- Au whakatauhia10A
AS/NZS 3012:2019 Table 1
- Wāhi o te kaikawe2.5mm²
AS/NZS 3012:2019 Table 1
- Heke whakahiato e tūāpapa ana te roa5%
AS/NZS 3012:2019 Table 1
- Heke whakahiato kua whakamahia i runga0%
AS/NZS 3012:2019 Table 1
- Heke voltage katoa e whakaatuhia ana e tēnei roa5%
AS/NZS 3012:2019 Table 1
- Roa teitei rawa60m
AS/NZS 3012:2019 Table 1
- Whakamahinga whānui, kotahi waeHua60m
AS/NZS 3012:2019 Table 1
- Whakamahinga whānui, toru wae120m
AS/NZS 3012:2019 Table 1
- Whakamahinga motuhake, kotahi wāhanga35m
AS/NZS 3012:2019 Table 1
- Whakamahinga motuhake, toru wāhanga70m
AS/NZS 3012:2019 Table 1
Mō tēnei tātaitai
How this is calculated
The tool checks a cord or flexible cable on a construction site. It uses the length limit in AS/NZS 3012:2019 Table 1. The limit depends on the rated current, the conductor area, the use and the phases.
- Length entered. You enter the length of the cord run. You can add the length of the PSOA supply lead, under Cl 2.6.10(b).
- Length checked. The tool adds the two. It checks that total against Table 1.
- Rated current and area. It reads the Table 1 row for your rated current and conductor area.
- Use and phases. It picks the column: general or specific use, single or three phase.
- Maximum length. It gives the Table 1 length. The inside-the-limit answer passes when the length checked is at or under it.
- Total drop. The Table 1 length is based on a 5 % drop. The tool adds the drop already used upstream and gives the total at the equipment.
| Step | Table or clause | What it decides |
|---|---|---|
| PSOA lead | AS/NZS 3012 Cl 2.6.10(b) | The length counted with the cord |
| Maximum length | Table 1 | The limit for the rating, area and use |
| Total drop | Table 1 | The drop at the equipment, with the upstream drop |
Worked example
A 10 A single‑phase cord of 1.5 mm², 50 m long, for general use. The maximum length is 35 m. The 50 m run fails. A 2.5 mm² cord at 40 m passes, with a maximum of 60 m.
Limits
- The 5 % drop is in addition to the drop the fixed installation already used. Enter the real upstream drop.
- A zero upstream drop is the default. Treat it as optimistic.
- The figures suit ordinary site power tools.
- The smallest flexible cord conductor is 1 mm². Every cord carries its own earth conductor.
- Cord extension sets use heavy duty sheathed cable (Cl 2.6.3).
- Do not use double adaptors or piggyback plug adaptors (Cl 2.6.6).
See also: Construction site supplies, AS/NZS 3012, Builder's pole house build supply, RCDs and cord lengths and the site supply tool.
Pātai
He āwhina hoahoa te hua. Manatokohia ki te paerewa o nāianei.
Kia pēhea te roa o te ara taura toronga i tētahi wāhi hanga?
Ko Table 1 o AS/NZS 3012:2019 e whakaatu ana i tētahi tepe mō ia iahiko rating me te rahi kaikawe. Ko tētahi taura 10 A, 2.5 mm², wāhanga kotahi, mō te whakamahinga whānui, ka mutu i te 60 m. Ko te taura wāhanga toru, e whā ngā core, o taua rahi, ka eke ki te 120 m.
He aha te rerekē i waenga i te whakamahinga whānui me te whakamahinga motuhake?
E kapi ana te whakamahinga whānui i ngā taputapu wāhi hanga o ia rā, pēnei i ngā saw, ngā grinder me ngā drill. Ka whakaae ōna roa ki te heke 5 ōrau i te iahiko rating. Ko te whakamahinga motuhake mō ngā taputapu ka tūraru tētahi tangata ina rahua te tīmatanga mōtā. Ka whakaae ōna roa ki te 3 ōrau, nō reira he poto iho.
Ka uru te heke voltage o te ripanga ki ngā waea whakatū?
Kāo. Ka tāpiri te ōrau o te tūtohi ki te heke e whakamahia ana e te waea mau i mua i te socket‑outlet. Uruhia taua tatauranga, ā, ka whakaatu te taputapu i te katoa i ngā taputapu. Ka kī ngā putanga katoa pēnei.
Ka taea te honoa e rua ngā taura toronga?
Āe, mēnā ka noho te ara katoa i raro i tētahi tepe Table 1. Uruhia te tapeke o ia huinga hono, ā, ka tirohia e te taputapu taua tapeke. Ka tāpirihia hoki te taura puna hiko PSOA, nō reira ka tāpirihia e te taputapu. Ka tohutohu a AS/NZS 3012 i tētahi huinga kotahi, ā, ka kī kia kaua e whakamahia tētahi taura kōpaki, kei runga rānei i te reel.
He aha te kaikawe taura ngāwari iti rawa e whakaaetia ana?
Ka whakatakoto a Cl 2.6.2 i te 1.0 mm² hei iti rawa mō ia kaikawe o tētahi taura whakapaipai. Me whai kaikawe whenua hoki i te taha o āna kaikawe ora.
Ngā tauira mahi
Kōrero o muri
Ngā Clause me ngā Table e pānuitia ana e tēnei taputapu
- AS/NZS 3012:2019 Cl 2.6.2Site flexible cords
- AS/NZS 3012:2019 Cl 2.6.3Site cord extension sets
- AS/NZS 3012:2019 Cl 2.6.6Site adaptors
- AS/NZS 3012:2019 Cl 2.6.7Cord and cable length limit on a site
- AS/NZS 3012:2019 Cl 2.6.8(b)Joined extension sets on a site
- AS/NZS 3012:2019 Cl 2.6.10(b)PSOA supply lead counted in the cord length
- AS/NZS 3012:2019 Table 1Maximum cord and cable lengths for construction sites
Ia Clause me Table, me te pēhea i manatokotia ai ia tētahi
Ngā tūtohi i arotakehia whakamutunga i te 1 Oct 2026.
Ngā taputapu hononga
He whai hua tēnei?
He pātai, he uara rānei e kitea ana he hē? Whakapā mai.