Kupu Whakataki: Te Hiranga o te Haumaru Hiko
Ko te hiko, te toto kore e kitea o te hapori hou, e whakakaha ana i ō tātou kāinga, i ngā ahumahi, me ngā mahi auaha. Heoi anō, he mōrearea ā-roto kei roto i tēnei kaha nui, ko te mōrearea o te ru hiko me te ahi e puta mai ana i ngā hapa. Ko ngā Pūrere Auaha Toenga (RCD) he kaitiaki nui ki ēnei mōrearea, ka momotu tere i te pūtake hiko ina kitea e rātou ngā au turuturu kino e rere ana ki te whenua. Ahakoa ko ngā RCD pumau kua whakauruhia ki roto i ngā waeine kaihoko e whakarato ana i te tiaki nui mō ngā ara iahiko katoa, ko ngā Pūrere Auaha Toenga Socket-Outlet (SRCD) e tuku ana i tētahi paparanga haumaru ahurei, ngāwari, me te tino arotahi. Ka rukuhia e tēnei tuhinga whānui te ao o ngā SRCD, e tūhuratia ana ā rātou mahi hangarau, ngā tono kanorau, ngā āhuatanga mahi matua, me ngā painga hua whakamīharo e hanga ana i a rātou hei taputapu tino nui mō te whakarei ake i te haumaru hiko puta noa i ngā taiao maha.

1. Te Whakamārama i te SRCD: Te Whakamārama me te Ariā Matua
He momo RCD motuhake te SRCD e whakauruhia tika ana ki roto i te putanga hiko (putanga hiko). Ka whakakotahi i te mahi a te putanga hiko paerewa me te tiaki whakaora ora o te RCD i roto i te wae mono kotahi, motuhake. Kāore i rite ki ngā RCD pumau e tiaki ana i ngā ara iahiko katoa i raro iho i te wae kaihoko, ka whakaratohia e te SRCD te tiaki ā-rohe.anakemō ngā taputapu e mono tika ana ki roto. Whakaarohia he kaitiaki haumaru whaiaro kua tohua mō taua putanga kotahi.

Ko te mātāpono matua o ngā RCD katoa, tae atu ki ngā SRCD, ko te Ture Au o Kirchhoff: me rite te au e rere ana ki roto i te ara iahiko ki te au e rere ana ki waho. I raro i ngā āhuatanga mahi noa, he ōrite, he rerekē hoki te au i roto i te ara iahiko ora (wāhanga) me te ara iahiko kūpapa. Heoi, ki te puta he hapa – pērā i te ārai taura kua pakaru, te pā o te tangata ki tētahi wāhanga ora, te urunga mai rānei o te makuku – tera pea ka kitea e tētahi au he ara kāore i te whakaarohia ki te whenua. Ka kiia tēnei tauritekore he au toenga, he au turuturu whenua rānei.

2. Te Mahi a ngā SRCD: Te Tikanga Pūrongo me te Tūtaki
Ko te wāhanga matua e whakahohe ana i te mahi a te SRCD ko te whakawhiti hiko (CT), he matua toroidal (āhua porowhita) te nuinga o te wā e karapoti ana i ngā ara iahiko ora me ngā ara iahiko kūpapa e tuku ana i te putanga hiko.

1. Aroturuki Tonu: Ka aro turuki tonu te CT i te tapeke o ngā iahiko e rere ana i roto i ngā ara iahiko ora me ngā ara iahiko kūpapa. I raro i ngā āhuatanga noa, kāore he hapa, he ōrite, he rerekē hoki ēnei iahiko, ā, ka hua ake he rerenga aukume kupenga o te kore i roto i te matua CT.
2. Te Kimi i te Au Toenga: Mena ka puta he turuturu o te au ki te whenua nā te hapa (hei tauira, mā te tangata, mā te taputapu rānei), ka iti iho te au e hoki mai ana mā te ara iahiko kore i te au e tomo mai ana mā te ara iahiko ora. Ka puta he rerenga aukume kupenga i roto i te matua CT nā tēnei kore taurite.
3. Te Whakaputa Tohu: Ka puta he ngaohiko i roto i te takai tuarua e takai ana i te matua CT nā te huringa o te rerenga aukume. He rite tonu tēnei ngaohiko whakaoho ki te rahi o te iahiko toenga.
4. Tukatuka Hiko: Ka whāngaihia te tohu whakaoho ki roto i ngā ara iahiko hiko tairongo i roto i te SRCD.
5. Te Whakatau me te Whakahohenga o te Huringa: Ka whakatauritea e te hikohiko te taumata o te iahiko toenga kua kitea ki te paepae aro o te SRCD kua whakaritea i mua (hei tauira, 10mA, 30mA, 300mA). Mena ka nui ake te iahiko toenga i tēnei paepae, ka tukuna e te ara iahiko he tohu ki tētahi whakawhiti hiko tere-mahi, ki tētahi pana āhua-totoka rānei.
6. Te Momotu Hiko: Ka whakatuwhera tonu te whakawhiti/pana i ngā hononga e tuku ana i ngā ara iahiko ora me ngā ara iahiko kūpapa ki te putanga hiko, ka tapahia te hiko i roto i ngā mirihekona (he iti iho i te 40ms mō ngā taputapu 30mA i te iahiko toenga whakatauranga). Mā tēnei momotu tere ka ārai i te ru hiko ka mate pea, ka aukati rānei i te ahi e tipu haere ana i puta mai i ngā iahiko turuturu tonu e pupuhi ana i roto i ngā rauemi mura.
7. Tautuhi Anō: Kia whakakorea te hapa, ka taea te tautuhi anō i te SRCD mā te whakamahi i te pātene i runga i tōna pereti mata, hei whakahoki i te hiko ki te putanga hiko.

3. Ngā Āhuatanga Matua o ngā SRCD Hou
Kei roto i ngā SRCD hou ētahi āhuatanga matatau i tua atu i te kimi i te iahiko toenga taketake:

• Te Tairongo (IΔn): Koinei te iahiko mahi toenga kua whakatauria, te taumata e hangaia ai te SRCD kia whati. Ko ngā tairongo noa ko:
  • Teitei o te Tairongo (≤ 30mA): Hei tiaki i te ru hiko. Ko te 30mA te paerewa mō te tiakitanga whaiaro whānui. Ko ngā putanga 10mA he tiakitanga whakarei ake, e whakamahia ana i ngā wāhi hauora, i ngā taiao morearea rānei.
  • Tairongo Waenga (hei tauira, 100mA, 300mA): Hei tiaki i ngā tūponotanga ahi e puta mai ana i ngā hapa turuturu whenua tonu, e whakamahia ana i ngā wāhi e tika ana kia nui ake te turuturu papamuri (hei tauira, ētahi mīhini ahumahi, ngā whakaurunga tawhito). Ka taea te whakarato i te tiakitanga ru tārua.
• Momo Kimi i te Au Hapa: Kua hangaia ngā SRCD hei urupare ki ngā momo au toenga rerekē:
  • Momo AC: Ka kitea ngā iahiko toenga sinusoidal tauutuutu anake. Ko te mea tino noa, ā, he ohanga hoki, he pai mō ngā kawenga ātete whānui, capacitive, me te inductive kāore he wāhanga hiko.
  • Momo A: Ka kitea ngā iahiko toenga AC e ruamengā iahiko toenga DC e pupuhi ana (hei tauira, mai i ngā taputapu he whakatikatika haurua-ngaru pēnei i ētahi taputapu hiko, ngā whakamama rama, ngā mīhini horoi). He mea nui mō ngā taiao hou me ngā taputapu hiko. Kei te piki haere te rongonui.
  • Momo F: I hangaia mō ngā ara iahiko e tuku ana i ngā puku tere rerekē kotahi-wāhanga (ngā kaitahuri) e kitea ana i roto i ngā taputapu pēnei i ngā mīhini horoi, ngā hauhautanga, me ngā taputapu hiko. Ka whakarato i te ātete nui ake ki te hinganga whakararuraru i puta mai i ngā ia rerenga auau teitei e whakaputaina ana e ēnei puku.
  • Momo B: Ka kitea te AC, te DC e pupuhi ana,mengā iahiko toenga DC maeneene (hei tauira, mai i ngā inverters PV, ngā rihi EV, ngā pūnaha UPS nui). E whakamahia ana i roto i ngā tono ahumahi, i ngā tono arumoni motuhake rānei.
• Wā Whakakore: Ko te wā mōrahi i waenga i te iahiko toenga e neke atu ana i te IΔn me te momotu hiko. E whakahaerehia ana e ngā paerewa (hei tauira, IEC 62640). Mō ngā SRCD 30mA, ko te tikanga he ≤ 40ms i te IΔn me te ≤ 300ms i te 5xIΔn (150mA).
• Iahiko Whakatauria (In): Ko te iahiko tonu mōrahi ka taea e te hononga SRCD te tuku haumaru (hei tauira, 13A, 16A).
• Te Parenga Aukaha (Whiringa engari he mea noa): He maha ngā SRCD e whakauru ana i te parenga aukaha whakauru, he fiusi te nuinga (hei tauira, he fiusi 13A BS 1362 i ngā mono UK) he wā rānei he kaiwawao ara iahiko iti (MCB), e tiaki ana i te putanga hiko me te taputapu kua monohia mai i te taumaha rawa me ngā iahiko ara iahiko poto.He mea nui, mā tēnei fiusi e tiaki te ara iahiko SRCD tonu; kāore te SRCD e whakakapi i te hiahia mō ngā MCB o runga i te waeine kaihoko.
• Ngā Ārai Ātete-Whakararu (TRS): He mea whakahau i roto i te maha o ngā rohe, ka aukatihia e ēnei ārai puna te urunga ki ngā hononga ora mēnā kāore e whakauruhia ngā pine e rua o te mono i te wā kotahi, ka whakaitihia te tūponotanga o te ru hiko, inā koa mō ngā tamariki.
• Pātene Whakamātautau: He āhuatanga whakahau e āhei ai ngā kaiwhakamahi ki te whakatauira i tētahi hapa iahiko toenga i ia wā, me te manatoko kei te mahi te tikanga whakatārewatanga. Me pēhi tonu (hei tauira, i ia marama).
• Tohu Tūnga: E whakaatu ana ngā tohu tirohanga (he pātene, he haki rānei he tae) mēnā kei roto te SRCD i te āhua "ON" (e wātea ana te hiko), "OFF" (e whakawetohia ā-ringa), "Tūnga" rānei (kua kitea he hapa).
• Te Pakari o te Mīhini me te Hiko: I hangaia kia tu atu i te maha o ngā mahi mīhini kua tohua (te whakaurunga/te tango i te mono) me ngā mahi hiko (ngā huringa whakataka) e ai ki ngā paerewa (hei tauira, me ≥ 10,000 ngā mahi mīhini e hiahiatia ana e te IEC 62640).
• Te Tiaki Taiao (Ngā Whakatauranga IP): Kei te wātea i roto i ngā whakatauranga IP (Tiaki Whakauru) rerekē mō ngā taiao rerekē (hei tauira, IP44 mō te ātete ki te tauhiuhi i roto i ngā kīhini/rūma kaukau, IP66/67 mō te whakamahinga o waho/ahumahi).

4. Ngā Whakamahinga Kanorau o ngā SRCD: Te Tiakitanga Whaiaro i ngā Wāhi e Hiahiatia ana
Nā te āhua motuhake o ngā SRCD, ka taea te mono-ā-ringa, ka tino whai hua ai ēnei mō te whakarei ake i te haumaru i roto i ngā āhuatanga maha:

• Ngā Tautuhinga Noho:
  • Ngā Wāhi Mōrearea Nui: Te whakarato i te tiakitanga tāpiri nui i roto i ngā wharepaku, ngā kīhini, ngā karāti, ngā awheawhe, me ngā putanga hiko o waho (ngā māra, ngā taupee) kei reira te mōrearea o te ru hiko nā te wai, ngā papa hiko, te whakamahinga rānei o ngā taputapu kawe. He mea nui mēnā kāore ngā RCD o te waeine kaihoko matua, he hapa, he tiakitanga tārua anake rānei (Momo S).
  • Te Whakahou i ngā Tāutanga Tawhito: Te whakapai ake i te haumaru i ngā kāinga kāore he parenga RCD, i ngā wāhi rānei he iti noa te hipoki, me te kore utu me te kore whakararuraru i te whakahou i ngā waea, te whakakapinga rānei i ngā waeine kaihoko.
  • Te Parenga Taputapu Motuhake: Te tiaki i ngā taputapu morearea nui, whai rawa rānei pērā i ngā taputapu hiko, ngā mīhini tapahi tarutaru, ngā mīhini horoi, ngā whakamahana kawe, ngā papu ika rānei i te wā e whakamahia ana.
  • Ngā Hiahia Wāpoto: Te whakarato haumaru mō ngā taputapu e whakamahia ana i ngā wā whakahoutanga, i ngā kaupapa DIY rānei.
  • Haumaru Tamariki: Ko ngā arai TRS me te tiakitanga RCD ka whakarato i ngā whakarei ake i te haumaru i roto i ngā kāinga he tamariki nohinohi.
• Ngā Taiao Arumoni:
  • Ngā Tari: Te tiaki i ngā taputapu hangarau mōhiohio tairongo, ngā whakamahana kawe, ngā kohua wai, me ngā kaihoroi, inā koa i ngā wāhi kāore i te hipokina e ngā RCD pumau, i ngā wāhi rānei ka tino whakararuraru te turaki i te RCD matua.
  • Hokohoko me te Manaaki Manuhiri: Te whakarite kia haumaru ngā taputapu whakaatu, ngā taputapu tunu kai kawe (ngā whakamahana kai), ngā taputapu horoi, me ngā rama/taputapu o waho.
  • Hauora (Kāore i te Tino Hira): Te whakarato tiaki i roto i ngā whare hauora, i ngā pokanga niho (ngā wāhi ehara i te hangarau mōhiohio), i ngā rūma tatari, me ngā wāhi whakahaere mō ngā taputapu paerewa.Kia mōhio: Ko ngā pūnaha hangarau mōhiohio hauora i roto i ngā whare pokanga e hiahia ana ki ngā whakawhiti wehewehe motuhake, kaua ki ngā RCD/SRCD paerewa.).
  • Ngā Whare Mātauranga: He mea nui i roto i ngā akomanga, i ngā taiwhanga (ina koa mō ngā taputapu kawe), i ngā awheawhe, me ngā huinga hangarau mōhiohio hei tiaki i ngā ākonga me ngā kaimahi. He mea nui te TRS i konei.
  • Ngā Wāhi Whakangahau: Te tiaki i ngā taputapu i roto i ngā whare takaro tinana, i ngā puna kaukau (he tika te whakatauranga IP), me ngā rūma whakarerekē kākahu.
• Ngā Pae Ahumahi me ngā Pae Hanga:
  • Te Hanga me te Whakahoro: He mea tino nui. Te whakakaha i ngā taputapu kawe, ngā pourewa rama, ngā whakaputa hiko, me ngā tari papa i roto i ngā taiao kino, mākū, me te huri haere tonu, e kitea ai te kino o ngā taura. He mea whakaora ngā SRCD kawe, ngā mea rānei kua whakauruhia ki roto i ngā papa tohatoha.
  • Ngā Awheawhe me te Tiaki: Te tiaki i ngā taputapu kawe, ngā taputapu whakamātautau, me ngā mīhini i ngā wāhi tiaki wheketere, i ngā awheawhe iti ake rānei.
  • Ngā Tāutanga Rangitahi: Ngā huihuinga, ngā whakaaturanga, ngā kiriata – i ngā wāhi katoa e hiahiatia ana te hiko rangitahi i roto i ngā taiao morearea pea.
  • Parenga Tārua: Te whakarato i tētahi paparanga haumaru anō mai i ngā RCD pumau, inā koa mō ngā taputapu kawe nui.
• Ngā Taupānga Motuhake:
  • Ngā Waka Moana me ngā Karawana: He mea nui mō te tiaki i ngā poti, ngā waka tere, me ngā karawana/RV ina mahi tata ngā pūnaha hiko ki te wai me ngā anga/chassis e ārahi ana i te waka.
  • Ngā Pokapū Raraunga (Taputapu Āpiti): Te tiaki i ngā aroturuki, ngā taputapu tāpiri, ngā taputapu rangitahi rānei kua monohia ki te taha o ngā whata tūmau.
  • Ngā Tāutanga Pūngao Whakahou (Kawe): Te tiaki i ngā taputapu kawe e whakamahia ana i te wā e tāuta ana, e tiaki ana rānei i ngā panera pūngao rā, i ngā tāpoi hau iti rānei.

5. Ngā Painga Hua Whakamīharo o ngā SRCD
He huinga painga motuhake kei ngā SRCD e whakaū ana i tā rātou tūranga i roto i ngā rautaki haumaru hiko o ēnei rā:

1. Parenga Whaiaro, Ā-Rohe: Ko tā rātou painga matua. Ka whakaratohia e rātou he parenga RCDanakemō te taputapu kua monohia ki roto. Mēnā he hapa i tētahi taputapu, ka pakaru noa iho taua SRCD, ka kore e pāngia ētahi atu ara iahiko me ngā taputapu. Mā tēnei ka ārai i te ngaronga hiko koretake, whakararuraru hoki puta noa i te ara iahiko, i te whare rānei – he take nui tēnei me ngā RCD kua oti te whakatika ("nuisance tripping").
2. Te Whakahoutanga Māmā me te Ngāwari: Ko te tāutanga he rite tonu ki te mono i te SRCD ki tētahi putanga hiko paerewa o nāianei. Kāore e hiahiatia he tohunga hiko whai tohu (i te nuinga o ngā rohe mō ngā momo mono), he whakarerekētanga waea uaua, he whakarerekētanga waeine kaihoko rānei. Nā tēnei ka tino māmā, ka whai hua hoki te whakapai ake i te haumaru, inā koa i ngā whare tawhito.
3. Te Kawe: Ka taea te neke ngāwari i ngā SRCD mono-roto ki ngā wāhi katoa e tino hiahiatia ana te tiaki. Kawea mai i te awheawhe karāti ki te māra, mai i tētahi mahi hanga ki tētahi atu mahi rānei.
4. Te Whai Hua o te Utu (Mō ia Wāhi Whakamahinga): Ahakoa he nui ake te utu mō ia wae SRCD i te putanga hiko paerewa, he iti iho i te utu mō te tāuta i tētahi ara iahiko RCD hou, te whakapai ake rānei i tētahi wae kaihoko, inā koa ka hiahiatia he tiakitanga i ētahi wāhi motuhake anake.
5. Haumaru Whakapai ake mō ngā Wāhi Mōrearea Nui: Ka whakarato i te tiakitanga nui i ngā wāhi tino mōrearea (ngā wharepaku, ngā kīhini, ngā wāhi o waho, ngā awheawhe), hei tāpiri, hei whakakapi rānei mō ngā RCD pumau kāore pea e kapi takitahi i ēnei wāhi.
6. Te Whakatutuki i ngā Paerewa Hou: Ka āwhina i te whakatutuki i ngā ture haumaru hiko tino pakari (hei tauira, IEC 60364, ngā ture waea ā-motu pēnei i te BS 7671 i te UK, NEC i te US me ngā ipu GFCI he rite tonu) e whakahau ana i te tiakitanga RCD mō ngā putanga me ngā wāhi motuhake, inā koa i ngā whare hou me ngā whakahoutanga. E mōhiotia whānuitia ana ngā SRCD i roto i ngā paerewa pēnei i te IEC 62640.
7. Manatoko Māmā-Kaiwhakamahi: Mā te pātene whakamātautau whakauru ka taea e ngā kaiwhakamahi ehara i te hunga hangarau te whakaū ngāwari me te auau kei te mahi tonu te mahi tiaki a te taputapu.
8. Ngā Ārai Ātete-Whakararuraru (TRS): He āhuatanga paerewa te haumaru tamariki whakauru, e whakaiti nui ana i te mōrearea o te ru mai i ngā mea e whakaurua ana ki roto i te putanga.
9. Te Tairongo Motuhake mō te Pūrere: Ka taea te whiriwhiri i te tairongo tino pai (hei tauira, 10mA, 30mA, Momo A, F) mō te taputapu motuhake e tiakina ana.
10. Te Whakaiti i te Ngāwari ki te Tūkino Whakararuraru: Nā te mea ka aroturukihia anake e rātou te ia turuturu o tētahi taputapu kotahi, he iti ake te tūkino i te nuinga o te wā nā te turuturu papamuri kore kino o ngā taputapu maha i runga i tētahi ara iahiko e tiakina ana e tētahi RCD pumau kotahi.
11. Haumaru Hiko Wāpoto: Ko te otinga tino pai hei whakarite i te haumaru ina whakamahi ana i ngā taura toronga, i ngā whakaputa hiko rānei mō ngā hiahia hiko wāpoto i ngā papaanga, i ngā huihuinga rānei.

6. Ngā SRCD me ngā RCD Pūmau: Ngā Tūranga Tāpiri
He mea nui kia mārama ko ngā SRCD ehara i te whakakapinga mō ngā RCD pumau i roto i te waeine kaihoko, engari he otinga tāpiri:

• Ngā RCD Pūmau (i roto i te Wāhanga Kaihoko):
  • Tiakina ngā ara iahiko katoa (ngā putanga maha, ngā rama).
  • Me tāutanga ngaio.
  • Whakarato i te tiakitanga taketake e tika ana mō ngā waea me ngā taputapu pūmau.
  • Ka taea e te hapa kotahi te momotu i te hiko mai i ngā putanga/taputapu maha.
• Ngā SRCD:
  • Me tiaki anake te taputapu kotahi kua mono ki roto.
  • He ngāwari te tāutanga mono-mai (momo kawe).
  • Whakaratohia he parenga hāngai mō ngā wāhi morearea me ngā taputapu kawe.
  • Ka wehea te taputapu hapa anake e te hapa.
  • He ngāwari te kawe me te whakahou.

Ko te rautaki haumaru hiko tino pakari he maha ngā wā ka whakamahia he huinga: ngā RCD pumau e whakarato ana i te tiaki taumata-ara iahiko (tērā pea he RCBO mō te whiriwhiringa ara iahiko takitahi) me te tāpiri atu ki ngā SRCD i ngā wāhi mōrearea nui, mō ngā taputapu kawe motuhake rānei. Mā tēnei huarahi paparanga ka whakaitihia te mōrearea me te whakararuraru.

7. Ngā Paerewa me ngā Ture: Te Whakapūmau i te Haumaru me te Mahi
Ko te hoahoa, te whakamātautau, me te mahi a ngā SRCD e whakahaeretia ana e ngā paerewa pakari o te ao me te motu. Ko te paerewa matua ko:

• IEC 62640:Ngā taputapu iahiko toenga me te parenga iahiko nui, kāore rānei, mō ngā putanga hiko (SRCD).E tautuhia ana e tēnei paerewa ngā whakaritenga motuhake mō ngā SRCD, tae atu ki:
  • Ngā whakaritenga hangahanga
  • Ngā āhuatanga mahi (aronga, wā takahuri)
  • Ngā tukanga whakamātautau (mīhini, hiko, taiao)
  • Te tohu me te tuhi tuhinga

Me tutuki hoki e ngā SRCD ngā paerewa e tika ana mō ngā putanga hiko (hei tauira, BS 1363 i te UK, AS/NZS 3112 i Ahitereiria/NZ, ngā whirihoranga NEMA i te US) me ngā paerewa whānui o te RCD (hei tauira, IEC 61008, IEC 61009). Mā te tutuki i ngā whakaritenga ka tutuki i te taputapu ngā paearu haumaru me te mahi matua. Rapua ngā tohu tiwhikete mai i ngā whakahaere whai mana (hei tauira, CE, UKCA, UL, ETL, CSA, SAA).

Whakamutunga: He Paparanga Hiranga i roto i te Kupenga Haumaru
Ko ngā Pūrere Iahiko Toenga o te Pūnaha-Putanga-Pūnaha he whanaketanga kaha, whai hua hoki i roto i te hangarau haumaru hiko. Mā te whakauru tika i te kimi iahiko toenga ora ki roto i te putanga-pūnaha e horapa ana, ka tukuna e ngā SRCD he parenga tino arotahi, ngāwari, me te ngāwari ki te whakatakoto ki ngā tūponotanga o te ru hiko me te ahi. Ko ō rātou painga – te parenga ā-rohe me te whakakore i ngā pakaru o te ara iahiko katoa, te whakahou ngāwari, te kawe, te whai huatanga utu mō ngā wāhi motuhake, me te tutuki i ngā ture haumaru hou – ka waiho hei mea nui puta noa i ngā wāhi noho, arumoni, ahumahi, me ngā wāhi motuhake.

Ahakoa te whakapai ake i tētahi whare tawhito kāore he RCD, te tiaki i ngā taputapu hiko i te papa hanga, te tiaki i tētahi papu puna māra, te tāpiri noa rānei i tētahi paparanga haumaru mō te rūma moe o te tamaiti, ka tū te SRCD hei kaitiaki mataara. Ka whakamanahia ngā kaiwhakamahi ki te whakahaere tika i tō rātou haumaru hiko i te wā e whakamahia ana. I te mea ka uaua haere ngā pūnaha hiko, ā, ka whanake tonu ngā paerewa haumaru, ka noho tonu te SRCD hei hangarau matua, kia kore ai e puta he utu mō te haumaru i te urunga atu ki te hiko. Ko te haumi ki ngā SRCD he haumi ki te aukati i te aituā me te tiaki i ngā mea tino nui.