Kōwhiri whakawhenua screen taura
Kimihia ngā wāhi hei whakawhenua i tētahi screen, waea drain, armour rānei.
Reads AS/NZS 3000:2018 and HELUKABEL and LAPP catalogues 2024. Tables checked 27 Sept 2026.
Whakamātau mahi 5
Ka whakakī ia mahi i ngā uara tauira. Whakakapia ērā ki ō uara.
- Earth a cable screenWhere to earth the screen and the drain wire.
- Earth an armoured cableWhere the armour of a power cable is earthed.
- Earth a drive cable's screenWhere the braid of a motor cable is earthed for EMC.
- Earth an instrument screen at one endHow a foil screen avoids a hum loop.
- Earth a drain wireWhere the drain wire of a signal cable is earthed.
Ngā whakauru
He tauira mahi me ngā whakauru taunoa.
- Ka aha te atārangi
- Atārangi ārai tūkino
- Hanganga arotaki
- Pepa me te whiri
- Me whenua tēnei taura i raro i Cl 5.4.1
- Āe
- Kei waenga i te atārangi me ngā kaiwhakahaere ora he whakaaiatanga rua, me tētahi uhi katoa
- Kāo
- Te mea e tirohia ana e koe
- Ara haruru, rānei au hurihuri
- Ka pā te kākahu ki tētahi paipa e kawe ana i tētahi matū ka ngiha
- Kāo
Whakaritenga whenua
Kotahi pito, i te takenga
- Clause
- AS/NZS 3000:2018 Cl 5.5.3.2(b)
- Take
- Earth the screen at the end where the cable leaves its switchboard or accessory. One earthing point leaves no closed path through the screen. No current then circulates in it, and no hum loop forms.
- Te tuku e hiahiatia ana
- Āe
- Hanganga arotaki
- Pepa me te whiri
- Tuhipoka hanga
- Overall foil with a tinned copper braid over it. The catalogue puts this construction against both low-frequency and high-frequency interference. Manufacturer data, not a standard. Source: HELUKABEL Industrial Ethernet Cables, SF/UTP ranges.
- Puna hanga
- manufacturer-data
He āwhina hoahoa tēnei hua. Manatokohia ki te paerewa o nāianei.
Ngā hīkoi tātaitanga
- Mahi arotakiemc-screen
AS/NZS 3000:2018 Cl 5.5.3.2(b)
- Kēhi clause i ōritea screen, armour or sheath on a cable or cord that needs earthing
AS/NZS 3000:2018 Cl 5.5.3.2(b)
- Whakaritenga whenuaHuaKotahi pito, i te takenga
AS/NZS 3000:2018 Cl 5.5.3.2(b)
- Te haumi e hiahiatia anaĀe
AS/NZS 3000:2018 Cl 5.5.4.3
- Ko tāu e tirotiro anahum-loop
- Hanganga atārangiPepa me te whiri
HELUKABEL and LAPP catalogues 2024
- Whakahē, i runga i te katalogiboth
HELUKABEL and LAPP catalogues 2024
Mō tēnei tātaitai
How this is calculated
The tool reads AS/NZS 3000:2018 Clause 5.5.3.2 for where a cable screen, drain wire or armour is earthed. It then states what that choice does to hum loops and touch voltage.
- Role. You pick what the metal does, such as an EMC screen.
- Clause case. The tool matches your role, your earthing need and your double-insulation answer to a case in Cl 5.5.3.2.
- Arrangement. It gives the earthing arrangement for that case. For an EMC screen against hum, this is one end, at the origin.
- Continuity. It reads Cl 5.5.4.3 for the continuity the screen needs. The screen and its fittings stay continuous.
- Concern. It states the effect on your concern. One earthing point leaves no closed path through the screen, so no hum loop forms.
- Construction. It adds the catalogue note for the screen type. This is maker data, not a Standard.
| Step | Table or clause | What it decides |
|---|---|---|
| Arrangement | AS/NZS 3000 Cl 5.5.3.2 | Where the screen is earthed |
| Continuity | Cl 5.5.4.3 | The screen and fittings stay continuous |
| Construction note | HELUKABEL and LAPP catalogues 2024 | What the screen type acts against |
Worked example
A foil and braid EMC screen with a hum loop concern. The tool gives one end, at the origin, from Cl 5.5.3.2(b). Continuity is required.
Limits
- The tool gives the safety arrangement of AS/NZS 3000. It does not give an EMC design.
- No document the tool holds backs earthing both ends for EMC. Check the device maker guide or IEC 61918.
- The gland advice is an AmpSize recommendation, not a requirement.
- The tool does not check the current rating of the screen.
See also: Segregation checker, Control panels and PLC wiring and The MEN system.
Pātai
He āwhina hoahoa te hua. Manatokohia ki te paerewa o nāianei.
Kei hea te whakawhenua o te screen taura?
Ka whakaingoa a AS/NZS 3000:2018 Clause 5.5.3.2(b) te pito timatanga, ā, kāore he tatau o ngā whakawhenua. Whakawhenuatia he screen, he armour, he sheath e hiahia ana ki te whakawhenua i te wā e puta ana te taura i tōna papa hiko, i tōna accessory rānei. Kāore te paerewa e whakaingoa ana i tētahi whakaritenga e rua ngā pito, nā reira kāore taputapu e hoatu ana.
Ka mutu te hum loop ina whakawhenua i tētahi pito?
Āe. Ina kotahi te wāhi whakawhenua, kāore he ara kati mā te screen, nō reira kāore he iahiko e porotī ana i roto, ā, kāore e hanga he hum loop. Ko te whakawhenua i te screen i ngā wāhi e rua ka hanga taua ara.
Āhea te screen e kore ai e hiahia he whakawhenua?
Ka hoatu a Clause 5.5.3.2(b) i ngā exception e rua. Ko te tuatahi, me whai insulation rua i waenga i te screen, i te braid rānei, me ngā kaikawe ora. Me whai hoki he taupoki kore-kawe-hiko ki runga i te taura. Me noho matara ia hono me ia whakamutunga i ngā wāhanga ora me ngā wāhanga kawe hiko kua takakitea. Ko te tuarua ka uru ki ngā keehi katoa ka waiho e Clause 5.4.1.
Ka taea te screen te whakahoki hei kaikawe whakawhenua?
Āe, i raro i Clause 5.3.2.2(ii), me tētahi tikanga mai i Clause 5.3.2.3(b). Ko ngā kaikawe ora katoa e whāngai ana i ngā taputapu me rere i taua taura ōrite. Ka tono anō Clause 5.5.4.3 mō te continuity, me tētahi impedance e rite ana ki te kaikawe whakawhenua parahi.
Nō hea mai ngā tohutohu hanga screen?
Mai i ngā kaitohu HELUKABEL me LAPP. He raraunga kaihanga tērā, ehara i te paerewa, ā, ka tohua e te taputapu pēnei. Ka mahi te braid mō te raru iti-auau, te foil mō te raru teitei-auau. Ka uru ngā kaitohu ki ngā taputapu mutunga anake. Kāore rātou, kāore hoki a AS/NZS 3000, e tautoko i tētahi whakaritenga e rua ngā pito.
Kōrero o muri
Ngā Clause me ngā Table e pānuitia ana e tēnei taputapu
- AS/NZS 3000:2018 Cl 5.5.3.2Earthing of wiring systems
- AS/NZS 3000:2018 Cl 5.6.2.4Conductive cable sheaths near piping
- AS/NZS 3000:2018 Cl 5.5.3.2, 5.5.4.3Screen, armour and sheath earthing
- LAPP and HELUKABEL catalogues, screen constructionsScreen constructions and what each one acts against
Ia Clause me Table, me te pēhea i manatokotia ai ia tētahi
Ngā tūtohi i arotakehia whakamutunga i te 27 Sept 2026.
Ngā taputapu hononga
He whai hua tēnei?
He pātai, he uara rānei e kitea ana he hē? Whakapā mai.