Txhua txhua peb lub xyoos, cov tswv cuab ntawm National Fire Protection Association (NFPA) yuav tuav cov rooj sib tham los tshuaj xyuas, hloov kho thiab ntxiv National Electrical Code (NEC), lossis NFPA 70, yuav tsum ua kom muaj kev nyab xeeb hluav taws xob hauv tsev, kev lag luam thiab cov khoom siv hauv tsev, qhov no yuav nce hluav taws xob kev nyab xeeb ntxiv rau kev thaj yeeb nyab xeeb ntawm kev siv lub siab.Raws li tsuas yog tus tswv cuab ntawm UL tus tswv cuab rau GFCI hauv thaj chaw Suav zoo, Kev Ntseeg Hluav Taws Xob yuav txuas ntxiv tsom mus rau kev tsim kho tshiab los ntawm cov kev hloov pauv tshiab thiab ua tau.
Peb yuav tshawb nrhiav qhov laj thawj ntawm kev ua raws li 6 yam vim li cas NEC feem ntau yuav xav txog qhov no thiab thaum kawg hloov pauv.
GFCI kev tiv thaiv
Kev hloov pauv los ntawm NEC 2020.
Code-ua vaj huam sib luag 2 (CMP 2) tshem tawm cov kev siv rau 15A thiab 20A lees paub GFCI kev tiv thaiv rau txhua qhov chaw txais khoom siv amp-rated hauv cov chaw uas tau txheeb xyuas.
Qhov laj thawj rau kev hloov
Qhov no yog ib qho kev txav mus rau streamlining ob qho tib si 210.8(A) rau cov tsev nyob thiab 210.8(B) rau lwm qhov tsis yog cov tsev nyob.Cov lus qhia tawm tswv yim rau cov kws tsim hluav taws xob, cov chaw muag khoom thiab cov neeg cog lus tam sim no paub tias nws tsis muaj teeb meem qhov twg GFCI raug teeb tsa thiab peb yuav tsum tsis txhob txheeb xyuas qhov chaw sib txawv.CMP 2 kuj tau lees paub tias qhov phom sij tsis hloov thaum lub voj voog loj dua 20 amps.Txawm hais tias qhov kev teeb tsa yog 15 txog 20 amps lossis 60 amps, qhov kev pheej hmoo hluav taws xob tseem muaj nyob thiab kev tiv thaiv yog qhov tsim nyog.
NEC 2023 yuav tuav dab tsi?
Raws li GFCI cov kev xav tau hloov pauv mus ntxiv, cov khoom sib xws (tsis xav tau kev mus ncig) tseem siv qee tus kws tshaj lij, feem ntau tsis ua rau.Txawm li cas los xij, kuv ntseeg tias kev lag luam tseem yuav tsim cov khoom tshiab uas ua raws li GFCIs.Tsis tas li ntawd, qee tus ntseeg tias nws muaj kev txawj ntse los txuas ntxiv GFCI kev tiv thaiv rau tag nrho cov ceg circuits.Kuv cia siab tias yuav muaj kev sib cav txog kev nyab xeeb ntxiv rau tus nqi raws li kev lag luam xav txog kev tshuaj xyuas yav tom ntej.
Cov khoom siv nkag
Kev hloov pauv los ntawm NEC 2020
NEC hloov pauv txuas ntxiv lub luag haujlwm ntawm kev sib koom ua ke nrog cov khoom lag luam nce qib.Tej zaum yuav tham txog cov teeb meem kev nyab xeeb hauv qab no:
- Kev pabcuam vaj huam sib luag nrog rau qhov kev sib txuas tsis raug tso cai lawm.
- Kev tua hluav taws tua hluav taws tua hluav taws rau ib- thiab ob tsev neeg nyob tam sim no suav nrog.
- Kab-sab barrier yuav tsum tau nthuav dav rau cov khoom siv tshaj li cov panels.
- Arc txo rau cov kev pab cuam 1200 amps thiab ntau dua yuav tsum xyuas kom meej arcing tam sim no qhib arc txo tshuab.
- Short-circuit tam sim no ntsuam xyuas (SCCR): siab connectors thiab cov khoom siv yuav tsum tau cim "tsim rau siv nyob rau hauv kab ntawm cov khoom pab cuam" los yog sib npaug.
- Cov cuab yeej tiv thaiv hluav taws xob yuav tsum muaj rau txhua lub tsev nyob.
Qhov laj thawj rau kev hloov
NEC tau lees paub qhov tsis zoo thiab kev phom sij cuam tshuam nrog cov cuab yeej siv thiab hloov ntau txoj cai ntev.Vim tias tsis muaj kev tiv thaiv los ntawm kev siv hluav taws xob, NEC tau pib hloov cov lej kev pabcuam hauv xyoo 2014 thiab niaj hnub no tau paub ntau ntxiv txog cov thev naus laus zis thiab cov kev daws teeb meem uas pab txo qis thiab txo qhov tshwm sim ntawm arc flash thiab poob siab.
NEC 2023 yuav tuav dab tsi?
Cov kev cai uas peb tau nyob nrog thiab tau txais ntau xyoo tam sim no nyob rau hauv nqe lus nug raws li kev siv tshuab txuas ntxiv mus.Nrog rau qhov ntawd, kev paub txog kev nyab xeeb nyob rau hauv peb txoj kev lag luam thiab NEC yuav txuas ntxiv mus rau kev sib tw cov qauv.
Cov khoom siv kho dua tshiab
Kev hloov pauv los ntawm NEC 2020
Kev hloov kho tshiab yuav tsim lub hauv paus rau kev siv zog yav tom ntej los ntxiv kom meej, nthuav dav thiab kho cov cai hauv NEC rau cov khoom siv kho dua tshiab thiab siv.Cov kev hloov pauv no yog NEC thawj zaug rau kev ua kom muaj kev kho kom zoo rau cov khoom siv hluav taws xob.
Qhov laj thawj rau kev hloov
Txawm hais tias cov khoom siv kho dua tshiab muaj nws qhov zoo, tsis yog txhua yam khoom siv rov ua dua tshiab tau tsim dua sib npaug.Nrog rau qhov ntawd, pawg neeg sib raug zoo tau tshaj tawm cov lus tshaj tawm rau pej xeem rau tag nrho cov cai vaj huam sib luag, hais kom txhua tus xav txog cov khoom siv hauv lawv qhov kev saib xyuas thiab txiav txim siab dab tsi tuaj yeem thiab tsis tuaj yeem hloov kho raws li National Electrical Manufacturers Association (NEMA) nyiaj pub rau cov khoom siv kho dua tshiab.
NEC 2023 yuav tuav dab tsi?
Peb pom kev sib tw ntawm ob sab.Ua ntej, NEC yuav tsum tau ntxiv kom meej meej rau cov lus hais nyob ib ncig ntawm "reconditioning," "refurbishing" thiab lwm yam.Qhov thib ob, kev hloov pauv tsis haisua li casresellers yuav tsum refurbish cov cuab yeej, uas muaj kev txhawj xeeb txog kev nyab xeeb.Nrog rau qhov no, resellers yuav tsum tso siab rau cov ntaub ntawv tseem ceeb ntawm cov chaw tsim khoom.Kuv ntseeg tias kev lag luam yuav pom kev paub txog cov ntaub ntawv ntau ntxiv thiab tsa cov lus nug ntxiv, xws li teev cov khoom siv kho dua tshiab rau ib tus qauv lossis ntau yam.Kev tsim cov ntawv teev npe ntxiv kuj tseem yuav ua kom muaj kev sib cav.
Kev ntsuas kev ua haujlwm
Kev hloov pauv los ntawm NEC 2020
NEC tam sim no xav tau kev txhaj tshuaj thawj zaug tam sim no rau qee cov khoom siv 240.87 tom qab kev teeb tsa.Ua raws li cov chaw tsim khoom cov lus qhia kuj raug tso cai raws li qhov kev ntsuam xyuas thawj zaug tam sim no yuav tsis ua rau muaj txiaj ntsig.
Qhov laj thawj rau kev hloov
Cov theem tau teeb tsa nrog cov kev cai NEC uas twb muaj lawm rau kev soj ntsuam hauv av-kev tiv thaiv cov cuab yeej siv thev naus laus zis thaum teeb tsa, thiab tsis muaj qhov yuav tsum tau muaj rau kev sim 240.87 cov cuab yeej tom qab kev teeb tsa.Thaum lub sij hawm kev tawm tswv yim rau pej xeem, qee qhov hauv kev lag luam tau hais txog kev txhawj xeeb txog tus nqi ntawm kev thauj cov khoom siv kuaj, kuaj xyuas qhov tseeb ntawm kev ua haujlwm thiab ua kom cov tuam ntxhab cov lus qhia kuaj tau ua raws.Txoj cai hloov pauv hais txog qee qhov kev txhawj xeeb no thiab, qhov tseem ceeb tshaj, txhawb kev nyab xeeb rau cov neeg ua haujlwm.
NEC 2023 yuav tuav dab tsi?
NEC feem ntau txiav txim siab seb yuav tsum ua dab tsi, tab sis lawv tsis txhais tias yuav ua li cas hloov pauv.Nyob rau hauv lub teeb ntawd, cia peb pom dab tsi yuav tshwm sim tom qab lub rooj sib tham tom ntej rau NEC thiab cia siab tias yuav muaj kev sib tham tom ntej txog kev cuam tshuam ntawm kev teeb tsa tom qab.
Load suav
Kev hloov pauv los ntawm NEC 2020
CMP 2 yuav txo qis cov lej suav lej kom suav nrog kev daws teeb pom kev zoo dua hauv lwm qhov tsis yog cov tsev nyob.
Qhov laj thawj rau kev hloov
Kev lag luam hluav taws xob muaj kev tsom mus rau kev ruaj ntseg, txo cov pa roj carbon monoxide thiab tsim cov thev naus laus zis uas txo kev siv hluav taws xob.Txawm li cas los xij, NEC tseem tsis tau hloov pauv cov lej suav kom haum.2020 cov cai hloov pauv yuav suav rau qis dua VA kev siv cov teeb pom kev zoo thiab kho cov lej raws li.Cov lej zog tsav cov kev hloov pauv;Kev txiav txim plaub ntug thoob plaws lub tebchaws tswj hwm ntau lub zog cov cai (lossis tej zaum tsis muaj ib qho twg), thiab cov kev daws teeb meem txiav txim siab lawv txhua tus.Yog li, NEC yuav coj txoj hauv kev zoo rau kev txo cov kev sib txuas kom ntseeg tau tias cov circuits tsis mus raws li ib txwm muaj.
NEC 2023 yuav tuav dab tsi?
Cov cib fim muaj nyob rau hauv kev txhim kho cov kev suav load rau lwm yam kev siv xws li lub hom phiaj tseem ceeb ntawm kev kho mob, tab sis kev lag luam yuav tsum tau ceev faj.Qhov chaw saib xyuas kev noj qab haus huv yog ib qho uas lub hwj chim tsis tuaj yeem tawm mus, tshwj xeeb tshaj yog thaum muaj xwm txheej ceev.Kuv ntseeg tias kev lag luam yuav ua haujlwm kom nkag siab qhov xwm txheej hnyav tshaj plaws thiab txiav txim siab txog qhov tsim nyog rau kev thauj khoom suav rau cov khoom siv xws li feeders, ceg circuits thiab cov khoom siv nkag.
Muaj qhov txhaum tam sim no thiab lub zog ib ntus
Kev hloov pauv los ntawm NEC 2020
NEC yuav xav kom muaj kev ua txhaum tam sim no ntawm txhua yam khoom siv, suav nrog cov keyboards, switchgear thiab panelboards.Cov kev hloov pauv yuav cuam tshuam cov khoom siv hluav taws xob ib ntus:
- Tshooj 408.6 yuav txuas ntxiv mus rau cov khoom siv hluav taws xob ib ntus thiab yuav tsum muaj cov cim rau qhov muaj txhaum tam sim no thiab hnub suav
- Tshooj 590.8(B) rau kev tiv thaiv overcurrent ib ntus ntawm 150 volts rau hauv av thiab 1000 volts theem-rau-theem yuav yog tam sim no txwv
Qhov laj thawj rau kev hloov
Panelboards, switchboards thiab switchgear tsis yog ib feem ntawm 2017 code hloov tshiab rau kev kos cim muaj tam sim no.NEC tseem tab tom ua cov kauj ruam los ua kom qhov muaj feem yuav tau txais kev ntsuas siab dua li muaj tam sim no luv luv.Qhov no yog qhov tseem ceeb tshwj xeeb tshaj yog rau cov khoom siv hluav taws xob ib ntus uas txav los ntawm qhov chaw ua haujlwm mus rau qhov chaw ua haujlwm thiab muaj kev cuam tshuam loj heev thiab tsim kua muag.Txhawm rau kom muaj kev ua haujlwm zoo, cov cuab yeej siv ib ntus yuav txo qhov kev ntxhov siab ntawm lub hwj chim txawm tias qhov twg muab qhov system ib ntus raug teeb tsa.
NEC 2023 yuav tuav dab tsi?
NEC tseem tsom mus rau cov hauv paus zoo li ib txwm muaj.Kev cuam tshuam kev ntsuam xyuas thiab SCCR yog qhov tseem ceeb rau kev nyab xeeb, tab sis lawv tsis tau txais kev saib xyuas zoo hauv thaj chaw.Kuv cia siab tias yuav muaj kev kos npe ntawm cov vaj huam sib luag nrog SCCR thiab muaj qhov txhaum tam sim no los tsav kev hloov pauv hauv kev lag luam thiab txhawb kev paub txog yuav ua li cas cov cuab yeej tau sau npe los txiav txim siab SCCR qhov ntsuas.Qee cov cuab yeej siv hauv paus SCCR ntawm qhov cuam tshuam qis tshaj qhov ntsuas kev tiv thaiv overcurrent, tab sis cov neeg soj ntsuam thiab cov neeg tsim khoom yuav tsum nco ntsoov txog qhov xwm txheej ntawd kom ntseeg tau tias kev txhim kho kom raug.Cov cuab yeej sau npe yuav raug tshuaj xyuas, raws li cov txheej txheem siv los suav cov dej tsis raug.
Saib rau yav tom ntej
2023 cov cai hloov pauv yuav yog qhov tseem ceeb hauv qhov kev tsim cov cai tswj xyuas kom sai sai hloov cov kev xav tau tiag tiag - qee qhov muaj nyob rau ntau xyoo lawm.Tau kawg, muaj ntau cov ntsiab lus yuav tsum tau xav txog rau tam sim no thiab yav tom ntej.Cia peb nyob twj ywm saib seb qhov hloov pauv NEC ntawm cov ntawv tom ntej no thaum kawg yuav ua rau kev lag luam suav nrog cov khoom siv tshwj xeeb xws li 15/20A GFCI receptacles, AFCI GFCI Combo, USB outlets, thiab hluav taws xob receptacles.
Post lub sij hawm: Oct-28-2022