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TCVN  T I Ê U C H U Ẩ N Q U Ố C G I A

TCVN 9208 : 2012

Xuất bản lần 1

LẮP ĐẶT CÁP VÀ DÂY DẪN ĐIỆN

TRONG CÁC CÔNG TRÌNH CÔNG NGHIỆP

Installation of electrical cables and wires for industr ial projects

HÀ NỘI - 2012 

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TCVN

9208

:

012

Myc lyc

L i

noi d$u

1

Pham vi ap dyng

5

a

A

Tar lieu vren d4n

4 Quy djnh chung

. .

.

5

Nor d6t. nor va bjt @u cap

6

6

~d~

Bgt cap va d l y d6n dien trong khay va thang cap

'7

7 ~ 6 p t cap va d l y dign trong hQpcap

0

8

~ a p

$t cap va d l y diijn trong he th6ng Ang ~ u b nay

20

9.

Ogt cap trwc tibp trong dAt va d t cap trong r%n cap 23

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TCVN 92 8 2 12

bi noi diu

Tieu chudn TCVN 9208 2012 thay the ti& chudn TCXDVN 263:2002

Tigu chudn TCVN 9208 2012 dwqc chuyen d6i tw ti& chudn TCXDVN

263:2002 the0 quy djnh tqi K ho in

1

Di &u 69 clja Lugt ti& chudn va quy

chudn

ky

thuat vA diem a K h o in 1 Dieu 7 Nghj dinh 127/2007/ND-CP ngay

01/8/2007 c i a Chinh phd quy dinh chi ti& thi hAnh mot s8 di&u c i a Lugt

tigu chu nvA quy chudn

ky

thuat.

TCVN 9208 2012 do T ruwng Dqi hqc ~ i e nruc HA N 0i bign soqn, 6 0 X5y

d ~ n g& nghi, T6ng cyc Ti& chudn D o lwwng Chat lwqng thdm dinh, 60

Khoa hqc va cdng nghg cbng b8.

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TIEU

CHU N Q U ~ C IA

TCVN 9208

:

2012

~ a pat cap va day dan dign cho cac c6ng trinh c6ng nghiep

nstallation of electrical c ables and wires for industrial projects

1

Pham vi

p

dung

1 1

Tigu c h u h nay quy djnh cac ygu chu kq thugt v& l i p d t cap va day d%ndign dung vwi dien ap

xoay chibu d6n 24 kV vA dien 6p mot' chi& d n 1500 V cho c l c cdng trinh cdng nghiep. Day va cap

dign dung ch ll y6u d t trong khay cap, thang cap, hop cap, bng ludn day, r5nh cap, h%mcap va khbi

dng cdp ho c chdn dwwi dht va co th& treo tren day thep dB cap.

1 2

Tigu ch u in nay khdng ap dyng cho vigc l i p d t d5y d%n rhn clia cac tram dign ngoai trwi va

dwwng d5y t5i dign trgn khdn g.

1.3. Ti6u chuhn nay khdng ap dyng cho cac cdng trinh co cdng nghg d c bigt nhw cdng trinh nghm, h5i

c i n g sari bay, ch6 bibn d h m6 v, v... nhwng c6 th6 ap d yng cho cac cdng trinh d5n dyng.

1.4. Ti6u ch u in nay khdng ap dy ng cho he th6ng cap dhu va cac thibt bi st3 dyng trong lwwi dien cap

dhu

1.5.

Khi lap d t d5y va cap dign, ngoai vigc ap dyng ti6u

chub

nay con p h i i tho5 m an nhOng y6u cAu

quy dinh trong cac v5n b i n khac co lien quan

1.6. Khi l i p d t he thdng lwwi dign cap dhu chn tu3n thlj the0 ti6u c h u in nganh 11-TCN-19-2006 cac

di&u ; 11.3.50 d6n 11.3.59.

2 Tai lieu vien d in

-

AS 3000 1991, Electrical Installation Australia Standards (Ti& chub uc v& l i p d4t dien);

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TCVN 9208 : 2012

11 TCN 19:2006, Quy phqm trang bj dien - ~ h ? l nI:

He

thbng Bwwng dsn dien;

-

TCVN 9207:2012, Bat dvwng d5y d2n dign trong nhii r vii c6ng trinh c6ng cbng Ti& chu& thibt

kt ;

-

TCXDVN 319 2004,

L P

Bat he th8ng nbi ddt thikt bi cho chc cdrlg trinh c6ng nghigp Yeu c?lu

chung ( I;

GHI CHU: I Ti

chusn dang d w ~ chuydn ddi thanh

TCVN

3

Thu ngCv

va

djnh nghia

Hao c ap (cable trench)

Ranh x5y ho c duc bsng bgt6ng d2n cap dien trorlg nha va ngoai trwi biin trgn c6 n%pdgy bang tsm

bGt6ng hoac tam thep c h h g trwn.

Khay cap (cable tray)

Phwwng tien dyng cap dwwi dqng twng doqn khay dvc 16(co chi&u rang phh hqp vwi s6 Iwqng cap d8t

trong khay dwqc chb tqo tiv th6p chiu ubn, mq k6m nong ho c son ch8ng gi va chi& dai thugn tien cho

viec 18pd t thanh tuybn dai dwqc'treo bsng quang treo hoac c8 dinh bang gih db).

Thang cap (cable lader)

Phwwng tien dyng cap dwwi dqng tivng doqn thang dai (co chi& rang phu hqp vwi sb Iwqng cap dgt

trong thang va chi& dai thugn tien cho vigc l%pBet co the dung n%pBey) dvwc chb tqo tiv thep chiu

ubn, ma kgm'nong hoac son chbng gi, ch%pvwi nhau thanh tuybn thang dai, dvqc treo bang quang

treo ho c c6 dinh bang gia 68.

Hop cap (trunking)

Phvwng tien dyng d5y va cap dien hinh hap dai co n i p day va co tibt dien vu6ng ho c hinh chfi nhgt,

b h g kim loqi hogc bsng vat lieu khac co sivc b&n cw h ~ cao.

6 n g ~u b n ay ( conduit)

6ng chuyiin dung bang vet lieu chju nhiet va co db b&n cw h ~ cao dung d& lubn day vii cap dien.

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TCVN

9208 201

2

Hanh lang

ky

thuQt technical gallery)

Hanh tang ngbm dvw i d%tdv qc x2y dvng

cY6

l%pcac c%ukien d b va d2n cac loqi cap dien, cap thdng

tin, cac loqi Bng cbng nghe tiv cbng trinh nay d6n c6ng trinh khdc. Ben trong hanh lang co bb tri 1bi di

cho ngvw i p h ~ c U.

~ A n g y thugt technical floor)

~ h n gvq c thiet k6 x3y dy ng danh riQngcho viec lap d t cac h@ hbng day diCn civng, day di@nm m

va cap dien, cac he thbng cap thbng tin lien lac va cac he thbng bng cbng nghe nh v bng b3o bn, bng

truy6n nhiet v.v

...

iv phan nay den phan khac clia cbng trinh thbng qua h e thbng bng kq thuat.

Hop

kv

thuQt technical box)

~ h b nh6ng gian dv q c xay d yn g nbi th6ng cac tbng cda cdng trinh ma BC 14p Bat cac giP dir cac

thang cap va cac gia d b cac bng c6ng nghe khac di tiv thng nay dQn Ang kia clia c6ng trinh.

3.9

~6

lubn cap cable hole)

H6 p h ~ c

J

cho viec ~u b nap qua nhivng nwi khdng tign cY&o xwi mat d%tkhi chn b3o tri thay th6 cap.

3 10

~6 ga boot)

Hb thu gom nvw c clia he thbng thoat nvwc (clia r3nh cap)

3.1 1

~ h b ing cap cable block)

La he thbng bng ludn cap b h g gbm hogc bAng nhya d vq c dat trong v6 bgc b4ng be tbng.

3.1

2

Hap nbi cap cable joint)

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TCVN

9208 2012

La cAu kien bhng kim logi b4n trong co chiva ph?ln n6i d?lu cap co the la n6i thang, n6i chCi hoec n6i

chO thgp. ~ h? l n6i cap dwqc cdch dign v i Iwp v6 kim logi.

M Ing s6ng em cap cable gland)

Phy kign c8 dinh va b io vg cdp khi ~ubnua tAm day bing dign, thvwng dvqc ch6 tgo bhng dbng thau

hoac polycacbonat. No co th in gi6ng mot dogn 6ng ngin , dwwng kinh trong phu hqp vwi dwwng kinh

ngoai cira cdp dign ~ubn ua no vA mot d?lu co ren ngoai d ~ubn ua ddy bing vA mot vAnh ham dgng

6cu c6 ren trong d b8t chat phia tr4n tAm ddy.

Cap hq ap low voltage cable)

Cap dung vwi dien ap khang lbn hwn 1000 V xoay chi hoac 1500 V mot c h i h giOa cac d8y dsn dien

v i nhau hoac kh6ng lwn hwn 600 V xoay ch i h hoac 900 V mot chi giOa day dien va d i y ti6p dAt.

Cap Iwc hq ap Electric power cable)

Cap dung cho mgch dign sw cAp tiv thanh cdi ph in ph6i hg ap d n cac phy t i i dign Iwc, khac vbi cap

dung

cho mgch di u khi n, do Iwwng, b i o vg, tin hi , th6ng tin, bao chay..

Cap trung ap medium voltage cable)

Cap dung vwl dign ap Iwn hwn 1 kV nhwng kh6ng lwn hwn 35 kV xoay chibu.

Khsu thu hqp reducer)

Phy kign khay hoac thang cap dung d6 chuyen ti6p tiv mot khay hogc thang rong sang mot khay hogc

thang hep hwn.

Cut bend)

Dogn khay, thang cap hogc 8ng ~ubn iy u6n the0 met ban kinh cong nhAt dinh d d6i hwwng di c i a

tuy6n cap.

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TCVN 92 8 2 1 2

4 Quy djnh chung f

4 1

NhOng quy dinh dvwi day ap dyng cho vigc 13pdat cap va d5y dien ngoai triv nhOng mach tao

thanh cac b6 phgn nguygn thd nhv dong cw dien, thiet bj dieu khidn, b6ng dieu khidn dong cw va cac

thi6t bj khac d% 6 hqp s8n tqi nha ch6 tao.

4.2

Triv trvwng hqp d4c biet, cap va day dien st> dung cho mot c6ng trinh c6ng nghiep ph6i dvqc b60

ve trong cac phvwng tien nhv khay cap, thang cap, 6ng lubn d5y, hop cap rZlnh cap v.v hoac ch6n

dvbi d4t.

4.3

Kh6ng duqc phep Bat cap khi chva 13pxong cAc phvwng tien bao che nhv 6ng lubn d5y, khay,

thang cap, hop cap, r5nh cap V.V.

4.4 ~ 6 i6i cap hoac day dign chi dvqc chap nhgn trong cac trvwng hqp sau d5y:

a) Di6m n6i bbn trong cac thi6t bj va khi cy dign.

b) Didm n6i nAm trbn d5y tikp ddt di cljng tuy6n cap. Co th6 n6i hoac ph5n nhanh d5y ti6p dht ngay

trong khay cap, thang cap hoac hop cap.

c) ~ i d m6i bgn trong cac hop n6i va phy kien chuyen dung thuoc cac mach chi6u sang, d m ,

thbng tin, bao chdy v.v

d) Dvdng cap chn d4t co chi& dai Ibn hwn chi& dai t6i da cia cuon cap tren tang cap.

4 5

Cap tiv dvwi dat di IGn hoac ~ubn ua tvwng ph6i Bat trong cac doan 6ng lubn civng va phAi thwc

hien bign phap ch6ng thim, ch6ng 3n m6n vA pha hoai cw hgc.

4 6 M5ng s6ng dem cap, gia db hoac quang treo va cac phy kign khac dung dd ldp Bat cap ph6i

dvqc b60 ve ch6ng gi va ch6ng 5n mon bAng cach ma kem nong hogc sun ph i b& m t ngoai bang vgt

lieu chdng gi, chdng 3n mon.

4.7

Nku tai mot diQm nao do cap co nguy cw bj phd hoai cw hgc thi do ph6i bAo vg cap trong

phvwng tien bao che chdc chdn.

4.8

Tqi dja di6m co xe cZ, qua lai, ph6i dat cap trong 6ng lubn d5y ch/u lvc

b

do s5u t6i thidu I m inh

tiv mat ddt t v nhibn xudng d6n b& mat trgn cljng c ia phvwng tien bao che cap dien.

4 9

~ u y 6 nap ph6i dvqc lyla chgn sao cho ng5n nhat va phii b6o d6m an toan khbng bj hv h6ng v&

cw hgc, do chdn dong, bj gi, bj nong qua mivc quy dinh hoac bj cac tia hb ;luang do cac dvwng cap dgt

gAn nhau g?iy ra. CQn tranh dat cac d5y cap bdt cheo Ien nhau hogc vdt cheo Ibn cac dvwng 6ng dAn

khac.

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92 8 12

4 10 Co th6 b6 tri cac hb lubn cap cho mot Boqn tuydn cap Bi qua m ot khu vy c co b& mgt I gqch hoac

B6 bgt6ng B6 phyc vy b5o tri, thay the cap khi chn sGa chea . ~6 ~ u b nAp p h ii co kich thvwc phu hqp

vwi y3u chu 14pBat cap vd p h i i co g i i i phap thoat nwwc B6 cap kh6ng bi ngam trong nvwc. ~ h p y va

cau truc hb ~u Bn ap p h ii chju Bv qc t5i trgng b& m t.

4 11 Khi chgn tuyen cAp trong phqm vi cb thb, chn trAnh cac vung Bat co chat 3n mon v6 kim loqi clja

CAp.

4 12

~6

trAnh cho Bv bn g cAp khbi bj h v h6ng va gay ra cho cAp cac l v c cw hgc nguy hi6m trong qua

trinh 14p ap va van hdnh, p h i i th yc hien cAc ygu chu sau Bay:

a) Cac day cap p h i i c6 phong the0 ch iiu ddi tiv 1% den 3% (d t the0 ki6u ran bo) ho cap co

th6 co d%nBv qc khi Bat bi bien dqng do nhiet Be clja b i n than cAp c in g nhlv cac kht c4u B t cap.

c a m d y phbng cap the0 ki6u khoanh vbng (hinh xo8n 6c hoac Ib xo)

b) Cac day cap Bat n8m ngang trgn cac kbt caul cac tvbn g xd

v.v..

.

p h ii Blvqc kep chat

6

cac Bi6m

cubi, b c i hai phia c lja Boqn cAp u6n vd c lja cAc hop n6i khac.

c) Cac day cAp Bat thdng BGng the0 cac kbt caul the0 tv bn g p h i i B vq c kep vwi mGc tinh tohn B6 lwp

ngoa i clja cap kh6ng b i bien dqng vd kh6ng lam h6ng chb n6i ruot cAp trong cAc trv bn g hqp n6i do

tac dung trgng lvq ng b5n than cap.

d) Cac kb t cau B& loqi cAp kh6ng bgc thbp phHi Idm thd ndo B6 trAnh Bv qc nhOng h v hqi v& cw hgc

cho v6 CAP hd kep cAp p h i i dung cac Bgm Ban hbi B6 bao bgc.

e) Cac loqi cAp (k6 c i cap bgc thep) B t 6 nheng ch6 cb the x i y ra h v hqi do va cham (ch8 6 t6 qua

Iqi, ch8 chuygn c hb m ay m bc, hdng hoa v.v ...) ph i i Bvqc b i o ve Bhn chi& cao 2 m k6 tiv m t B t

hogc rn t nbn.

f)

Khi Bat cac cap mwi bgn cqnh cAc cAp Bang v n hanh thi p h i i co bign phap Bb kh6ng lam h6ng

cac cap Bang van hanh.

4 13

M8i cap va day Bien phHi Bvq c treo ho c e sao cho nb kh6ng chju ly c keo qua Iwn vd sao cho

Bhu cubi cap ho c day kh6ng chiu lyc keo k6 c i yc keo xu& phat t iv trgng lvq ng b i n than cap hogc

day BiQn.

4 14 Mgi phvwng tign b i o vg cap vd day Bien nh v Bng ~ u b n ay, khay cap, thang cap, hop cap ph ii

Blvqc c6 Binh sao cho mgi tac hqi cw hgc cb thb x i y ra trong Bi&u kien v n hAnh kh6ng gay nguy hi6m

cho chung, phvwng phap c6 Bjnh bng lubn day PVC cGng ph5i cho phe p 6ng co th6 co d%n y do the0

s y thay B6i nhigt Bo khi van hdnh.

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TCVN 9208 2012

4.15

Cac c6ng trinh d t cap p h ii lam b in g cac vat lieu khdng chay, cac kf?t c h a cap,cirng p h ii lam

bAng cac vat lieu khang ch4y.

4.16

Cac c4p Bat ngoai trwi p h i i cb bien phdp b i o ve d cap khdng bi i n h h vbn g trvc tiQp clja tia

sang m t trwi vA tran h dv q c gnh hv& ng cira c4c ngubn nhiet khac.

4.17

Khi treo cap bAng day d 5 cap, p h ii dat no

do

cao n i m ngoai t%m ac hgi cw hgc tG cac loai xe

cw gib i vA phHi treo cap v i b d i y thep sau m 6i c v ly 0.3 m trong tw thd hwi chung. Trvwc di6m treo cap

d% u ien vA sau diQm reo cap cu6i cung p h i i d6 m ot vong cap h inh chG U s i u khdng it hwn 0,15 m.

4.18

~ 6 iwi hang kep

dau

day hoac chu d i u day, m6i kep dAu day hoac chu dhu d i y v& m6i phia ch i

dvq c tiep nhan t6 i da.hai dau day. Ph i i c h ~ nep d?iu dOy hoac chu ddu day ph6i phu h qp vwi dien Ap

va d6ng dign t i i clja mgch dign chgy qua no.

4.19 Khi dAu cap digu khien vao hang kqp d% udOy p h i i c6 ty ep d% u uot dan. NQU kh6ng co ty ep thi

d%u uot day phai dv qc nhung thi6c.

4.20

Cap digu khihn tG r%nh ap hogc khoang dvw i san di v40 ng3n trgn cira tir, b in g phHi di trong hop

cap day kin.

4.21

Khi lhp d t (cap va d i y d8n dien) kh6ng dv qc d6 d4y nh6m tihp x ~ j c bi kep dbng thau hogc kep

bAng kim loqi khac ch&a nhi&u dbng. Trvwng hqp c% nd i u d4y nh6m vao thanh cai ddng ph5i sl l dung

kep nh6m-dbng.

4.22

Ban kinh u6n cong clja cap kh6ng thuoc loqi c6p mgm p h ii dir Iwn d6 khang g%yh v hdng cap va

phHi tuan the0 quy d inh trong B6ng 1.

Bang 1- Quy djnh ban kinh u6n cong tdi t h i h cGa cap

Cach diQn

C4ch dien cao su hogc

PVC lei dbng hoac nhdm

n h ih sq i ben

Cach dien cao su hoac

PVC Idi dbng ho c nhBm

n h ih sq i ben

Cach dien PVC Idi dbng

hogc nh6m cirng

Lwp b ~ c

Kh8ng bQc

hep

Khdng bgc thep

BQChep

Bgc thep ho3c kh6ng

bgc th6p

Bvwng kinh

ngoAi d cira cap

(mm)

Q ~

Lwn hwn 10va

d&n 25

Lwn hwn 5

s i t ky

B& ky

Ban kinh u6 n cong t6i

thidu cira cap (tinh b ng

96 14n ngoai cGa cap

4

6

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9208 2012

Bang 1- (k t thuc) t

4.23

Ban kinh vong u6n phia trong clja ruot cap khi tach cap ra phii l%yso vwi dvwng kinh ngoai clja

ruot cap kh6ng nh6 hwn 10 ~ h n6i v&i loai cap c6 I&p bgc cach Bign bbng gidy t&m dAu va 3 lhn d6i v&i

loai chp c6 I&p bgc bang cao su.

C Ic h BiQn

Cach dign b8ng giey t&m

dhu

Cach dien bbng ch%tv6 cw

4.24 Kh6ng dvqc d t qua n h i h cap hoac di y d%ndign trong cac phvwng tign nhv khay cap, thang

cap, 6ng lubn diy, hop cap d& khi 13pBat, b5o tri, thay the khang lam hv hbng cap, xi y xat lwp cach

dign clja cap hoac d iy dan dign.

4.25 M6i dvdng cap ph5i co s6 hoac tirn ggi. Nbu Bvbng cap c6 n h i h cap Bat song song vwi nhau, thi

ngoai s6 clja c hhg ph5i thirm vao chc chii,

I;

II; 1ll.v.v...CAc cap Bat hb ciing nhv t%tc5 cac 6ng n6i

cap, kep chp d&u ph5i c6 nhAn hi&.

L p b ~ c

Bgc chi

Bgc dbng hoac nh6m

c6 hoac kh6ng co

PVC

Trgn nh%n lja cap ghi: m3 hi& dign Ap, mat cst, s6 higu hoac ten ggi

Cdc nhin do ph5i Bat c6 dinh va ch8c chsn, kh6ng bi tac hai do i n h hvbng clja m6i trvdng xung

quanh.

Dw wt~g inh

ngoai d c i a cap

(mm)

~ % ty

sat kj,

4.26 Ph5i xb Iy hinh dang, b& mat khiu n6i cac doan 6ng ~uBn iy, khay cap, thang cap, hop cap

V.V. .c0ng nhv khiu dan cap tiv phvwng tien bao che ra ngoAi hoac twi mot phvwng tign bao che khhc

d& khi ldp Bat, bao tri thay the kh6ng bl h v h6ng

CAP.

Ban kinh u6n cong t6i

thihu c6a cap (tinh bang

s6 lan

d

ngoai c6a cap

4.27 Khi cac phvwng tign bao che cap chay xuyirn qua sAn hoac tvwng m i san hoac tvwng do co tac

dung ngan cach vung d6 chay vwi vung kh6ng co nguy cw chay thi b do 16 xuyirn qua ph5i dvqc trat kin

bang vat lieu chiu Iba co c p phu hqp.

4.28 hii,ng nwi d6 chay, cap ph5i dvqc b5o ve trong h6p d%nkh6ng chay. Ngoai ra khoing kh6ng

gian xung quanh cap birn trong hop d%n ciing phi i co hang rao ngan chch vung d& chay vwi vung

kh6ng c6 nguy cw chay lam bang vat lieu chju Iba c%pphu hqp.

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TCVN 9208 2012

4 29

Hop n8i cac cap m&m vbi nhau hoac hop n8i cap kh6ng m&m vwi cap m&m hogc, d3y m&m phHi

d t

6

vi tri d6 dang ti&p can d6 ki6m tra chAt lvqng m8i n6i. Quy d]nh nay kh6ng b%tbuoc d8i vwi kh3u

n8i han hogc ep.

4 30 Trong khu vytc cac xi nghigp, cap co thd Bat dvwi dht 6, rong hao) hoac trong kh6i 8ng cap, ho c

trong cac mvwng cap co mai che hay nsp day.

4 31 Trong khu vytc tram bi6n ap va cac tram ph3n ph6i dien, cap co th6 dat trong mvwng, trong 6ng,

dvbi d i t ( 6 rong hao) hogc trong mowng n6i.

4 32

Cac dvwng cap di

w

tram ph3n ph8i dien trung t im vwi s8 lwqng tr6n 20 cap cung di the0 mot

hvbng ph5i Bat trong hhm.

4 33

Trong thanh ph8, thi trhn th6ng thvwng cac dvwng cap phHi d t dvbi dAt ( 6 rong hao) dgc the0

I& dvwng trong pham vi he ph8, hogc men the0 nha, cAc dHi dht trBng c6. ulwng ph8 quHng trvbng

co nhi&u c6ng trinh ng%m khac thi cap ph5i Bat trong ham. Ch8 giao cheo vbi dvwng ph8, quHng

trvwng thi cap phAi Bat trong kh6i 8ng ho c trong 6ng.

4 34 Trulbng hqp phHi sljla chea dvwng cap thi cho ph6p d t cap tam thwi trytc tibp dvbi d i t (ma

kh6ng c?ln kh8i 8ng hogc brig), n6u trong 8ng c8p kh6ng co ch8 dyl phong ho c kh6ng co ch8 d6 69t

cap tam thwi.

4 35 B6n trong nha xvbng cap co thh d t trytc ti&p the0 c8c cdu truc clja nha (d t hb ho9c trong hop

hay trong 8ng) trong cac mvwng, trong kh6i 8ng chp, trong h%mcap hoac trong 6ng, dat dvwi n&n nha

xv&ng cfng nhv trong mong clja may.

4 36

Cho phep d t nhi&u Iwp diy d in, cap dien trong hop, nhvng phHi ngin cach m8i Iwp vwi nhau.

~ b n g at cAt cac d2y dsn, cAp dien k& cH cAc Iwp bgc cach dien va cac Iwp v6 bgc b6n ngoai kh6ng

dvqc lwn hwn 35 m t cst b6n trong vwi hop kin va 40% vwi hop m6 nsp.

4 37

Dong dien li4n tyc cho phep cia day dsn, d3y cap dien d t thanh nhom ho c thanh nhi&u Iwp,

phHi tinh vwi he s8 hieu chinh the0 s6 Ivqng va cach d t d3y dan, s8 lvqng va vj tri tvwng h6 clla cac

bo (Iwp) c fng nhv cac d iy d3n khbng mang tHi.

4 38

Ovwng cap cung c%pdien cho nheng mAy m6c di dong ph5i dung loai cap m&m co Iwp cach dien

bhng cao su hogc bang cac v t lieu towng tyt d6 tranh hdng cach dien clia cap khi &p u8n

di

u6n lai

nhi&u %n. Cap m&m I3 loai cap.co ruot gbm nhieu sgri d3y sang m&m)

4 39

Trong cac lvwi dien ph5i dung cap 4 ruot, kh6ng cho phep 69t d3y trung tinh ri6ng

re

vwi cac d2y

pha.Trong cac Iuwi dien xoay chi&

3

pha 4 d3y dien ap twi 1 kV co trung tinh n6i dAt, cho phep dung

cap

3

ruot v6 nh6m va dung v6 nh6m lam d5y trung tinh n8i d i t thay ruot thiv tv, triv cac trvbng hqp

sau d2y:

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a) €let

6

nheng nwi co cac m8i trvbng d6 n8 (trong nha ccng nhv ngoai trbi)

t

b) €let b nhivng nwi khi trong diQu kien v n hanh binh thvwng, dong dien trong day trung tinh vvqt

qua 50 dong dien clja day pha.

4 40 Phy kien clja cAc phvwng tien bao che d3y va cap dien phii 16psao cho d6 ti&p can, thao nap

ki&m ra, thay th& cap cfi hogc bd sung cap mwi.

4 41 Cap n6i vwi d%udb, c i m bibn nam ngoai tlj, bing phai chiva it nhdt mot doqn

150

mm phyc vy

b io tri.

4 42

Mgi cap dien hq ap h6i v6i ngubn cung cdp trong cac t6 dien ph i i chiva ch i h dai cac pha dlj d

co th& cap ampe kim khi cQn do dbng dien van hanh.

4 43 Cap trong cAc phbng dieu khi&n cQn hqn ch6 di n8i va nen tap trung di trong khoang dvwi met san

va phi i co bien phap chbng chuot.

4 44 ~ clja cap dien di tiv dv6i san xuy6n qua t6 hoac bang dien ph i i dvqc c6 dinh chat chsn bang

kep dm va mang sang dem cap d& trgng Ivqng b i n th3n clja cap kh6ng gay sivc c3ng tac dyng vao

dQu cap.

4 45 Cap mot 16i co I&p bgc b h g v&i th6p hoec bang th6p khdng dvqc dung cho mqch dien xoay

chibu. Cap hoec day dsn dien xoay c h i h d8t trong 6ng lubn d3y, hop cap, khay hoac thang cap

v.v bang v t lieu dAn tiv hoec lubn qua 16 betdng cbt thep phi i bb tri sao cho cac d iy d%nclja c i ba

pha va d3y trung hoa (nQu co) phii cung nam trong mot phvwng tien bao che hogc trong cung mot 16

betang c6t thep va giiva cac day nay khdng dvqc co vach ng3n d%n iv lam phat sinh dbng dien xoay.

4 46

Cap lvc ha ap kh6ng dvqc di chung vwi cap bao chay hoBc cap chibu sang sy c6 trong cung mot

bng 1u6ncap hoec mang hop.

4 47 Cap lyc hq ap kh6ng dvqc di chung vwi cap th6ng tin va cap mqng may tinh trong cung mot 6ng

lubn cap hogc hop cap triv khi co vach ngan bang vat lieu cach dien co cdp phu hqp Bet giiva cap hq ap

v&i cac cap con lqi.

4 48 Chi duqc phep k6o cap tiv tang cap sau khi ~ Z sn m6t bieu cap vao dau cap.

4 49 Phii trang bj trvwc khi khbi cdng cac dyng cy chuy6n dung nhv may u6n bng, kim tubt Ibi day,

kim hoac may 6p d?iu cat, con IAn, gia db tang cap v.v

NQU

thdy c%n,phi i

chub bj

s8n gian giao d6

keo day hoec cap tren cao.

4 50 ~ d ti cAc cap phi i dvqc cet bang dyng cy chuyen dung nhv cva sst, va p hi i c6 chibu dai thu n

tien cho vigc lam d?iu cap. D%ucap da cat cyt phii dvqc qudn b3ng va nhung bitum nham ngin chgn

nvwc x im nhap trong thwi gian chb lam d?iu.

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4 51 Dhu cap kh6 ha ap c%ndwqc xiv Iy bang cach quhn hai ba lvqt bang nyldng hoac bang co pham

chAt tvwng dvwng, phii bAt dQu bang tiv cu6i Iwp cach dign chiva lqi sau khi ep d4u c6t.

4 52

Dhu cap kh6 trung ap phi i dwqc xiv Iy bang phvwng phap hw top, siv dyng chyp cu6i ba ng5 va

cac doan 6ng cach dign tivng pha co kh5 nang ty, thu nh6

lai

khi bj hw nong. Vigc ap dung phvwng

phap khac ph5i dvqc ky sv phy trach giam sat thi c6ng ph%ndign clja chlj dhu t v cho phep beng van

b5n.

4 53

Khi keo day hoac cap dien kh6ng dvqc d6 day hoac cap dien chiu lylc keo vwqt qua lylc t6i da

cho phep do nha chb tao chi dsn.

4 54

Phwwng tien bao c'he cap nhw 6ng Iubn d3y, khay, thang cap hoac hop cap b nhivng nwi chiu 5nh

hvbng clja nhigt do cao ph5i la loai chju dvqc nhigt do cao ma kh6ng bj bibn dang.

4 55

06 phgn cap hoac day dsn Bat bkn trong phwwng tien bao che chiu dvqc nhiet do cao ph5i co v6

cach dign chju dvqc nhiet do cao.

4 56 Cap co v6 PVC hoac v6 chi hoac v6 chju d%ucham ben liva khi d t tren kh6ng vvqt qua dwwng

l&n phi i la loqi co s8n sqi thep chju ly,c ben trong.

4 57 Cac cap n6i song song ph5i thuoc cung chljng loai, co cung chieu dai, cung tibt dien 16i va ph5i

s8p x&p sao cho dong phy t5i ph5n b6 dbu trong thylc t6.

4 58 Cap tiv ranh cap hoac khoang cap dvwi san trwwc khi ~ubnen b5ng, tl j dien ph5i d6 dai them mot

cung u6n dyl phong kho5ng m dbn 1,5 m.

4 59 Triv trvwng hqp d c bigt, cap tiv trong khay, thang cap hoac 6ng lubn d5y hoac hop cap trwwc khi

~ubn ao thibt bi Bat khu vy,c s5n xu& ngoai tl j b5ng ph5i dd them mot khoanh dyl phong tiv 0,5 m

dbn 1 m. Doan cap dy, phong kh6ng bAt buoc ph5i khoanh tron trong trwwng hqp cap n6i vwi thibt bi

~ubnrong 6ng ruot ga.

4 60

Day co mau vang va xanh kbt hqp chi dvqc dljng lam day tiQp dAt thibt bi.

.

4 61

6ng ~ubn 5y phdi co mau da cam khi chn ph5n biet v&i cac 6ng c6ng nghe khac.

4 62 Trvwc khi 18pBat day vA cap dien ph5i thylc hign cac bwwc sau:

a) Th6ng mach d3y k& c5 d3y tiep di t dyla tren sw db n6i d5y va sw db nguyen Iy thibt kb. Khi th6ng

mach kh6ng dvqc d& dign ap c ia pin thibt bi do hoac dbng hb van ning lam h6ng cac linh kign

dien tiv. dm dung mgg6m met d& th6ng mach.

b) Do dien trb cach dign clja cap, khi do ph5i tach r&i 16i cap ra kh6i mach co lien quan d& kh6ng lam

hdng cac thibt bj dien va linh kien dien tiv trong mach do.

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c) Dien trb cach dien do dvqc giGa cac 16i cap vwi nhau vA giGa Ibi cap vwi d%tkh6ng ddqc nh6 hwn

1

MR

nbu la cap hq ap va kh6ng dvqc nh6 hwn 90% giB trj ghi trong bten ban thi nghiem clja nha

chQ qo nbu 18cap trung ap.

d)

~ i d mra ch%t wqng cac mdi ndi cap vA ch%t vqng lam d?ru cap. Cap trung ap phdi dwqc dun vj thi

nghiem chuygn nghanh thll tang ap mot chi&u va do dong ro trvbc khi dong dien.

e) ~ i & mra sb hieu dgu diy, bieu sb cap, CQC danh d%uchc tuydn cap ngAm va bi&u bao &c tuybn

cap trung hp.

4 63

Khi ki&m tra cach di n 'cba cap, dien ap do m4t c h i h kh6ng dvqc nh6 han

2

l?rn dien ap danh

djnh (1%~ri sd hieu dung ivng vwi dong xoay chi&) clja mqch c6 li6n quan nhvng khdng cQn I&n hwn

500 V cho cap dung v&i dien Qpkhdng qua 500 V v8 khdng can I6n hwn 1000 V cho cap dljng v&i dien

ap 600 V dbn 1000V. Dien Bp do met chi&u cho cap trung ap khdng dvqc nh6 hwn 2500 V.

4 64

Khi Bat cap trong cac gian s i n xu&, cAc cap b ~ chep khdng dvqc c6 v6 b ~ c6n ngoai, c6n cac

cap kh6ng b ~ chep thi khdng dvqc co v6 b i o ve b h g vat lieu d chay.

4 65

Tr6n v6 kim loqi clja cap vA mat kim loqi dat cap ph i i cb ldp chdng gi khdng chay

dd

bAo v9 cap.

Khi dat cap trong gian nha co m6i trvbng xam thylc, phAi dung loqi cap co v6 b ~ cang polyvinyl hoac

cac v6 khac tuy the0 tinh ch t xam thylc clja mdi trvbng.

4 66

Khi Bat cap I4 thi6n ngoAi nhd dv&i mai hi6n tr6n cac be mat kh6ng chay dvqc phi i co Iwp b i o

ve ching gi b6n ngoAi cap.

4 67

Khi Bat cap chd d%tco tac hqi d&n v6 cap (co nv&c, bljn by, d%tddp cb xi ho c vat iieu x iy

dylng v.v

..)

thi phAi dung loqi cap v6 chi hoac nh6m co 1wp bio ve b6n r7goAi beng polyvinyl,

b

nhGng

ch6 cap di qua nwi bun I%y, hi cap phi i dvqc lyla c h ~ no tinh todn 66n cac dihu kign dia ch%t,hoa h ~ c

vA cw hqc.

5 ~ 6 i

at

n6i va

bit

dau

cap

5 1

Vi

tri ralvao cap clja tl j dien kin, cap vao hdp nbi clja d4ng cw va cac thi&t bi dien phii dvqc lam

kin chbng am beng nut cap. Cac ch6 ndi vA bit d?ru cap b cac dvbng cap phi i d im bao d& cap khdi bj

am vA khdng bi tac hqi clla m6i trwbng xung quanh. Chd ndi cap vA bjt d?ru cap phii chiu dwqc Bien ap

thi nghiem ddi v&i dwwng cap.

5 2

Khi ndi cap dien ap tw

3

kV ddn 20 kV cb v6 b ~ chi hoac nh6m phii dung h4p ndi b h g chi hoac

b&ng dbng (dbng thau), Cac cap dien ap ddn 1000 V co v6 b ~ cang chi hay nh6m ndu chi Bat dwwi

d%t hi co thd dung cac hop nbi bang gang, n6u dat

16

thi6n thi dung cac hep ndi bang chi. Chb tqo va

lap rap cac h4p ndi dAu cap, hap ndi cap ph5i thylc hien the0 dung cac quy djnh vA chi d3n kji thuat.

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5.3. Tr6n nh0ng dutbrlg cap dung cd cAp co cach dien bhng gihy tsm va cap co 1&p cAch dien it d%u,

n&u mbc dat cap c6 Idp cAch dien gihy tsm cao hwn mivc Bat cap co

6p

cAch dien it dhu thi ch8 n6i

cap phi i dung hop n6i hAn chuykn ti&p.

5.4. NhOng dutwng cap dign ap tr6n 1000 V n&u Bat loai cap m&m cach Bign bang cao su lubn trong

bng cao su, thi m6i n6i cap c h hwc hien b8ng phutwng phap hoa nong (hhp chin) va bao b6n ngoai

ch8 n6i mot lwp nhwa chbng gm.

5.5. ~ lutqng hop n6i cap trong 1 km dutbng cAp xay dwng mwi dien ap tiv 1 kV d&n 35 kV kh6ng

dutqc vv@ qua cai, n&u qua s6 lutqng do thi phi i dutqc sv cho phep clia cw quan qu in Iy van hanh.

5.6. Cac dcvwng cap.cb v6 bgc kim loai vA cac k&t tau a dat cAp phdi n6i ddt the0 y6u chu clja ti&

chusn TCXDVN 319:2004, L P d4t he thbng n6i dht thibt bi cho cac c6ng trinh c8ng nghiep Y6u cQu

chung.

5.7.

Khi nbi dht cAc v6 bgc kim loai clia CAP, hi v6 kim loai va bang thep ph5i n6i vwi nhau va nbi vwi

vd hop bhng day dbng mbm. Trong t i t cd mgi trutwng hqp, d3y n6i dht phdi co mat cAt kh6ng nhd hwn

mm2vA kh6ng Iwn hwn 25 rnm2. ~ 6 idi dutbng cAp dhu dien ap 10 kV, mat c&t d3y n6i dAt ph5i xac

dinh the0 tinh toan vb 6n djnh nhiet.

5.8.

6

doan n6i dutbng cap nbi dutwng d3y d8n dign tr6n kh6ng n&u cot clja dutbng day tr6n kh6ng,

kh6ng co n6i dAt thi dutqc phep n6i dht cAc hop d%ucap vwi v6 bgc kim loai clia cap, n&u hop cap phia

d%ukia clia cap dutqc n6i dht thl dien trb n6i dht clja vd cAp phi i phu hqp vdi y6u c%uclja quy pham

n6i dht.

6.

L P

d t cap va d i y d i n dien trong khay va thang cap

6.1.

Phdi s~jtdung

he th6ng khay va thang cap dk b50 ve cap dign trong pham vi nha

xutbng co s6 lutqng cap I h .

6.2. He th6ng khay va thang cap phii dutqc 13phoan chinh trvwc khi d t cap.

6.3.

6

nhOng nwi cAn thibt, he th6ng khay va thang cap ph5i duqc 13pd t cung vwi cut ndi, t6, kh iu

chO thgp, kh3u thu hep, nsp day khay vA cac phy kign khac.

6.4. ~ u y & nhay hoac thang cAp kh6ng rong hwn 1200 mm, phdi co gih d& hoac quang treo sau m6i

cy, ly tiv 1 m d&n 3 m, c~ ly nay ph6i dutqc chp co thim quybn ph6 duygt trutwc khi thi c6ng.

6.5. Gia d& ho c quang treo phdi dwqc c6 dinh vao cac kbt chu x3y dwng hoac han vao cac m i hep

chy trong k&t chu b6tdng clia trQn.

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6 6 Khay va thang cap ph5i dlj reng dd tht c5 cac cap n%mbBn trong dAn thAnh mot ICvp. Khoing hb

giiva hai cap k8 nhau phi i chiva dlj 86 buQc cap vAo then ngang clja thang hoac dAy khay cap bang

day thst nhva.

6 7

Vat lieu ch6 tqo khay hoac thang cap ph i i

I

thep mq kem n6ng hogc co lwp phlj ngoai bang vat

lieu ch6ng gi vA ch6ng gn mon.

6 8 CAc cap trong khay vA thang cAp ph5i dvqc sap xdp the0 th6 ty , p h in thanh tivng nhom tujl the0

chuc n2ng vA dvqc c6 dinh bang day that nhya.

6 9 Khay va thang cap ph l i c6 d0 b8n vA d0 cOng thich hqp dk cb thd d& toAn bQ cap chua trong

khay hoac thang cap.

.

6 10 Khay vA thang cAp khdng dvqc co cqnh sdc, mat th6 rAp hoac ba via dd kh6ng lam h6ng cach

dien ho c 16p v6 ngoai clja cap. Vit vA bu16ng khdng dvqc nhd Ign kh6i mat trong clja khay hoac thang

cap.

6 1 1 hbng nwi co sG dung cut, t6, khau chCv thgp, khau thu hep v.v

...

uydn khay ho c thang cap

ph5i dvqc b5o d5m tinh li8n tyc v8 dign, r~hvng h6ng dvqc dung b5n thin khay ho c thang cap IAm

day tidp dht.

6 12 hbng nwi c6 cap tiv trong khay ho c thang cap lubn vao 6ng di day ho c mot phvwhg tien bao

che khac, ph5i b6 tri gia d& chac chan nham nggn

th n

suc cgrrg tac dyng 18n cap.

6 13 Tqi nhbng nwi tuydn khay ho c thang cap co nguy cw tich lug byi ho c co vat lieu rwi vAo, ho c

co hi& ivng nhiet, ph5i xem xet dd b6 tri phvwng tien b50 ve b6 sung nhv mfri che, quqt tti6ng gio

V.V.. .

6 14 Khi c?in tranh cac tuydn 6ng cw khi thuq lyc hogc kdt chu xay dyng, phi i trinh b5n v5 chi tikt clja

doqn tuydn khay hoec thang co sGa d6i v&i cw quan tv vhn thidt kd d6 dvqc ph8 duyet trvwc khi thi

c6ng.

6 15

Nwi

nao nvwc mva thhm qua cac cGa thdng b6 tri d ~ che0 tuydn khay hoac thang cAp thi ph5i

xem xet thyc hien biQn phAp ng2n chgn nvwc xam nhgp.

6 16

Tuydn thang cap chqy t h h g dung ph5i dvqc b5o ve b h g nap dgy kim loqi ch6ng 2n mon va

ch6ng tac hqi cw h ~ crong phqm vi 2 m tinh tw san hoAn thien hay mat d%t rb 18n.

6 17

Chung quanh khay hogc thang cap ph5i chiva hoac duy tri dlj kh6ng gian nham cho phep tikp

can d& dAng d& lsp d t va b5o tri cap.

6 18

Khay va thang cap ph5i dwqc tidp d%tva dvqc n6i d%tv6i d i y tidp d%tgAn nh%t.~uy&nhay va

thang cap dai ph5i dvqc n6i dht lap lqi sau m6i cy y nh%tdjnh do thidt k6 quy djnh cho tivng c6ng trinh.

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6 19

Phii c8 dinh cap ch%cch%nvAo then ngang clia thang hoac day dvc

I6

cda khay bsng ddy that

nhyla sau m6i khoing cach tiv 3 m dQn 1,5 m d8i vdi tuyQn chqy the0 pbvwng nhm ngang ho c tiv 1,5

m dhn 0,5 m dbi vdi tuybn chqy the0 phwwng khac. Cap cang to khoang cach buec cang ngQn.

6 20

Ngp tr2.n clja khay hoac thang cap va cac phwwng tien b i o ve b6 sung phdi duqc thao l i p dd

dang.

6 21 Tqi nhivng nwi tuyQn khay hoac thang cap chqy xuy2.n qua trhn, tvwng hoac san nha ng8n cach

phong c6 didu hoa kh6ng khi v&i phong kh6ng c6 didu hoa kh6ng khi, phii bit kin 8 th6ng va ph ii b i o

dim k h i n8ng cach nhiet giiva cac phbng.

6 22 Cap di tiv trong.khay hoac thang cap ra ngoai khdng dvqc vvqt ICn tren thdnh b2.n cda khay hdac

thang cap d6 kh6ng lam c i n trb viec day n%pkhay hoac thang cap.

6 23 Khi co nhidu thng khay hogc thang cap hq ap chqy song song dvwi tran nha the0 cung mot

hvCvng, thng nay chqy tren tang kia thi khoing cach giiva hai tang lien tibp kh6ng dvqc nh6 hwn 200

mm. Khoing cach cira tang tr2.n cung d8i vwi trhn hoec d im g i n nh%tkh6ng dvqc nh6 hwn 300 mm.

6 24 Khi co nhibu tang khay hosc thang cap hq ap chqy song song d ~ che0 hanh lang kjj thuat, ting

nay chqy tren tang kia thi khoing cach gi@ahai thng lien tiQp kh6ng dvqc nh6 hwn 300 mm. Khoing

cach clja tang dvwi cung

dBi

v&i mat tren cira tang 6ng cdng nghe chqy phia duwi kh6ng dvqc nh6

hwn 500 mm.

6 25

TuyQn khay hogc thang cap trung ap phii dvqc dat cach xa tuyQn khay hogc thang cap hq ap.

Khoing cach nay thvwng kh6ng nh6 hwn 500 mm va phi1 dwqc kjj SLY phv trach giam sat thi c6ng

phhn dien cda chlj dhu tv ph6 duygt.

6 26

Khay hoac thang cap kh6ng dvqc di chung vdi 8ng d i n d?ru ho c khi d8t trong cung mQt hanh

lang kj j thuat.

6 27 M6i tuybn khay hogc thang cap ph i i t v the co d%n yl do tr2.n cac gia d6 hogc quang treo.

6 28

Khi t u y h cap dang chqy the0 phwwng nam ngang d6i sang phvwng th ing divng hoac ngvqc lai,

khay cap hoac thang cap ~ h n

vqt

chuydn qua hai g6c u6n 135'.

6 29 Khay hoac thang cap trung ap phi i c6 mAu

S C

tvang phi n hogc bi&n bao d6 phan biet.

6 30

Trvwc khi lap dgt, khay hogc thang cap va cac phv kign phi i qua ki6m tra d& b io d im kh6ng co

khuybt tat v& dien, v& ca h ~ c :

Ki6m tra bhng m8t v& s6c bin,

dS

rAn chic, ch4t lvqng dvwng han va m6i n6i, Iwp son ph6, mq

k6m

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8 3 He th6ng 6ng lubn d i y phHi duqc 14pBat hoan chinh trw&c khi ~uBnap vAo 6ng. Vi, myc dich nay

trong 6ng lubn d iy p hi i co s8n day mbid k6o cap vAo 6ng.Tigu chu%nnay khdrlg b i t buac d6i vwi he

th6ng 6ng lubn di y d$t trong k6t c%ub6 tang dirc s8n.

8 4 06 i vwi he thdng 6ng lubn day d$t trong k6t c%ube tang duc s h , d iy va cap co the duqc lubn

ssn trwwc khi 66 b6 tbng, nhwng phi i co bien phap b50 ve cac dAu 6ng kh6ng d& vOa hogc b6 tang Igt

vao trong 6ng. 0bng thdi phii b50 ve cac dAu dAy tho ra ngoai mieng 6ng khdng bi divt g5y.

8 5 06 i vwi he thdng 6ng lubn d iy d$t trong kdt c%ube t6ng duc ssn kh6ng dwqc d 6ng lubn d i y

hoac cap chiu tac dung clja sivc tang col hgc nsy sinh trong qu8 trinh 13p Bat va d6 b6 tang.

8 6 Truac khi 46 betdng trllm len cac dng ~ubn ay, chc 6ng nay phPi duqc c6 dinh sao cho chi&

day clja be tdng sau khi Bang kdt bao bgc quanh tidt dien 6ng lubn d iy tai b%tky di&m nao c h g khdng

nh6 hwn 15 mm.

8 7

Tbng tidt dien clja cap ho$c day dien ~ubnrong 6ng d$t s3n trong b6 t6ng kh6ng duqc vwqt qua

40 tidt dien 6ng I U ~ay.

8 8 PhHi c6 dinh veng ch8c tuydn 6ng ~ubnay civng bhng kep 6m hoac bang phwwng phap khac d%

duqc ph6 duyet sau m6i cy ly khdng 1611 hwn

2

m d6i vwi 6ng ~ubn ay kim loai va kh6ng lwn hwn 1 m

d6i vwi 6ng lubn diy PVC civng.

8 9

6ng ~ubn i y kim loai va phy kien Bat trong mBi trwwng %m hAp, khdng khi co tinh an mdn, phHi

duOc ma k9m nong ho$c son phlj bang vat lieu ch6ng gi va ch6ng an mbn.

8 10 6ng ~ubn ay kim lo$ cb chi& dAi lien tyc ph5i co renb hai diu mieng 6ng.

8 11 Migng 6ng

d6

hb phHi duqc trang bj m6t doan 6ng lot co 6cu h%mhogc mat doan 6ng loe mieng

d6 kh6ng, am h6ng cach dien clja cap. ~ 6 uAu 6ng B6 hb nhm Igt trong mat mang bao che thi dung

doan 6ng lot, con ndu dAu Bng d& hb nh6 ra ngoai thi sb dung doan 6ng mieng loe.

8 12 S clit 6ng lubn day tr6n mat tuydn 6ng phPi han ch6 sao cho tdng s6 gOc b ht c i cac cut 6ng

kh6ng dwqc vwqt qua goc vu6ng. Khi gap trb ngai, co th& nwi rang ban kinh cong c6a cut 6ng d& tao

thugn Iqi cho vigc IAp dat. G6c clja cut 6ng lubn diy khdng dwqc nh6 hwn

90'.

Khi u6n 6ng khdng

dwqc lam thu nh6 duwng kinh trong clja 6ng.

8.13.6ng lubn d i y clja cap trung 8p ph i i d8 nhan bidt nhw mau S C twang ph in va phi i treo bi6n

c5nh bao.

8 14 6ng lubn d iy kim loai phPi BHm bHo tinh lien tyc v& dign. 6ng ~uBn ay kim loai ph ii dwqc ti6p

dAt va dwqc n6i vAo d iy tidp dat g h nhht.

8 15

Khi l i p Bat bng lubn day, phi i thyc hien cac bien phap ng3n chan nvwc xam nh8p.

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8 16 Trw&c khi lubn cap, phia trong bng lubn day p h i i Bwqc lam sqch ky. P h i i sG dung d i y mbi

cY

keo cap trong bng, tuy nhi6n khdng Bwqc dung dAu m a hoac vat lieu b8i trvn khi keo cap qua bng vi

n h v vgy co th& lam h6ng cach Bign clia cap.

8 17

Tr6n tuydn bng dai

b

nheng k h iu thu hep p h i i bu trw co dAn nhigt bdng rn6i n6i co dAn..

8 18

Khi Bat tuykn bng ~ubn iy cAn chqn vi tri cac hop nbi va cac phy kien thuan tign cho vigc tidp

can sGa ch&a.

8 19

C hi Bwqc dung bng lubn d i y vB phy kien bang vat lieu kh8ng chay B& b i o vg :

Cap cep ngubn cho thidt bi bao chay, ch&a chay, thidt bi sw tan n gw bi vB thang may.

Cap Bat trong vung d& chay.

8 20 6ng lubn d i y va cap dign vao cac thidt b / p h i i bb tri cac g io in g Bern chbng chht 16ng the0 Bwwng

bng vao thidt bi.

8 21

Cac gio ing Bgm c lia cac phy kign bng p h i i ch6ng Bwqc thc dyng an mon clia cac vat lieu tidp

can v&i chung.

8 22

Chc 6ng ~ u b n i y PVC Bat n6i trong cac khu vvc kh8ng c6 tac dyng an rnbn c6 th& 18 bng civng

c6 phy kiQnkhdng ren.

8 23

Cac 6ng lubn day Po lyetylen Bat chirn trong twbng gqch trat v&a xi rnang hogc thqch cao cac

v i n phong hoac khu vvc twwng t y p h i i Bwqc c6 djnh sao cho be mat phia ngoBi clja 6ng con sau hwn

mat twbng hoan thien it nhht 15 mm.

8 24 Cac rnbi n6i 6ng lubn d i y kim loqi co ren p h i i co vong Bgm ban g vat lieu dan Bign co tac dung

chbng i n non va kh8ng co hqi cho cach Bign clja cap.

8 25 Cac 6ng lubn d i y ngoai trwi p h i i la 6ng civng PVC hoac bng thep rnq kern nhiet dwi hoa.

8 26

Cut lubn d i y civng p h i i co ban kinh cong (6ng vCv cung ubn trong) Bli l&n d cap b3n trong bng

Bwqc ubn the0 quy djnh clia B in g 1. Nhwng trong mqi trwbng h qp khdng Bwqc nh6 hwn 2,5 l nBwbng

kinh ngoBi c i a 8ng.

8 27

La x i nwwc B ~ n glia he th6ng 6ng lubn d5y kh8ng kin phii Bat

b

Bi&m thhp nhht tqi nh&ng nwi

co

do

rnngwng tu.

8 28 Trong thwi gian thi c8ng, cac I6 h b tarn trong he thbng 6ng Bi d i y p h i i dwqc nut kin hoac Buqc

Bay kin c n han nhdm ngan ngwa s v xi rn nhap clia mmdc, vat la.

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8.29. Mieng clia nhiLng doqn bng ngsn xuygn qua tvwn g den cap vao nha, p h i i dwq c b,jt kin bang vat

lieu khdng chay vB khdng co ha i cho cach dien c lia cap.

8.30. Gia

d8

bng lubn dAy phHi d v q c Bet nhw cac b phgn c6 dinh clja kbt c%u i y dv ng co ssn.

8.31. Cac 6ng IuBn day d y phdng, p h i i d vq c d t ghn chb nbi cap vao thibt bj d6 cho viec d t cap trong

tvwng lai dv qc d6 dang.

8.32. Chi dv qc d t hop nbi cap cho tuydn dng ~uBn ay ch6n d vb i d%tkhi c6 van b i n tho5 thuan c lja kj7

s v phy trach giam sat thi c6ng phen dien clja chlj dAu tv .

8.33. Vit, bu ldng vP phy kitn

dk

bat ch(t 6ng lubn day p h i i drvqc kj7 s v phy trach gi lm sat thi c6gg

phhn dien clja ch lj ddu tv ph6 duyet trvwc khi sr i dyng. Kh6ng dvq c s ri dyng g6 d& cb dinh bng ~u b n

day v& chi duq c dung khoan dien ho?c khoan khi nen d khoan I6 phyc vu viec c6 dinh lubn d5y.

8.34.

Ch i dv qc kh&i cdng dat tuykn bng khi d5 xac dinh d vq c vi tri tuydn bng dy a the0 b i n vG clia cw

quan t v v h h ikt kb.

8.35. Khi cat bng 1u8nday p h ii cdt th in g g6c vwi tryc clja bng.

8.36. Trv&c khi lap Bat, 6ng ~ u b n ay va phy kien ph6i qua ki&m tra d bdo 84m khBng c6 khuydt tat v&

diQnva cw:

~ i 6 mra bang m4t v& sivc b& n, 66 ran chac, ch%t vq ng dvwng han va m6i nbi, Iwp sun p h i, m q

k6m v.v

...

-

~ i & mra v& tinh l ien tuc v& dien c ia bng ~ u b n ay kim loqi.

9. &it cap tryc ti6p trong dat va d t cap trong r%nhcap

9.1. Cap diQn Bat trv c tidp trong d% tp h i i la loqi co Iwp dai thep ho(c lv6i thep b i o v t hoac co v6 bgc

kim loqi. Vwi cac loqi cap cb c %u qo khac thi p h i i cb phsn vd b4o v t bgn ngoai bang vat lieu tvwng ty.

9.2. P h ii danh d%u uygn cap ngAm m8i nwi tuybn cap d6i hv bn g va sau m6i kh oin g

25

m dgc the0

tuyQn cap chqy thang bAng cgc danh d%uBet j tri kh6ng co ngvwi qua lqi.

9.3. Cgc danh d h uyQn cap p h i i la cgc be tang hinh hop chii, nhgt day vu6ng 100x100 mm cao 300

mm ch6n thAqg divng nggp trong dht 200 mm. Trgn dinh cgc dgc the0 dvwng cheo clja hinh vu6ng co

ghi m iri ten sun 8 6 chi hvwng di clja tuydn cap. Co the sG dung siv h inh try d thay thd cho coc danh

dAu tuykn cap nhOng vj tri giao th6ng di lqi (via he, long dv bn g ... .

9.4. Khi d(t cap try c tikp trong d%tp h ii lot dv d i cap va ph lj tr6n cap mot Iwp cat ho c d%tmin mdm

day it nhht 100 mm. Subt dgc tuydn ph4i danh d% u a dgy cap bang mot Iwp b3ng thep ho(c tAm PVC

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civng hoac gqch dht set nung xbp ngang (chm dung gqch silicat). Bat

b dQ

s i u viva 61.3d8 tranh cho

cap kh6i cac pha hoq i cw h ~ co th6 xHy ra trong qua trinh siv dyng, sau do l&p ddt d%mchat.

9 5 Khi lhp lqi dht khd ng dwqc d da, vgt lieu Iat n&n, 96 chay db, vat civng cqnh shc, n h ~ noac chdt

~ g tudng mwwng dat cap.

9 6

Triv trwbng hqp d c bigt,

do

s i u Bat cap tryc tibp trong ddt d6i vwi cap cb dien Ap dbn

24

kV

khdng dw qc nh6 hwn 0,7 m. Nbu co nhi&u lwp cAp chdn trong mwwng thi do sAu nay tinh cho lwp cap

tren cung. Trong phqm vi 5 m trwwc kh i dsn cap vao nha,

dQ

s i u Bat cap dwqc phep giHm dbn 0,5 m.

9 7 Khi Bat cAp try c tibp trong dht, khoHng cach h b giiva hai cap xbp cqnh nha u .trong cung mQt wp

cAp hoac giiva ha i 16p ~ 6 ~ . 1 ~ ' 1 0 0m d6i vbi cap hq 6p va 18 250 mm d6i vwi cap trung Pp. Khdng quy

dinh khosng cAch h b giiva hai cAp di&u khi&n.

9 8

Khi dat cap tryc t ibp trong dht p h ii d i m b i o k hoin g cAch h b giiva tuybn cap trung ap va tuybn

cap ha ap hoac cAc loqi cAp khAc khdng nh6 hwn 250 mm.

9 9 Khdng dwqc dat cap tr yc tibp trong cAc vung ddt co hoA chht il n mdn. Trwbng hq p bht buQcp h i i

d t cap trong vung dht nhw thb thi ph i i c h ~ noqi cap viva co lwp bgc thep, viva co lwp bgc ch i vA ngoai

cung la I&p v6 PVC. N6u I&p v6 ch i khdng dwqc bgc PVC thi p h i i Bat sq i cap viva noi trong 6ng ch%t

d6o cAch dign.

9 10 Khi tuybn cap dat tryc tibp trong ddt giao cheo v&i dwwng 6ng cdng nghg thi khoing cach giOa

chung khdng dwqc nh6 hwn 500 mm. Nbu 6ng cdng nghg la 6ng dsn d%uhoac dan khi d6t thi kh oin g

cach do khdng dwqc nh6 hwn

1

m. N ~ UAp dwqc lubn trong 6ng th6p b i o vg thi kho5ng cach trgn

dwqc g ii m 50%, bng thep p h i i vwqt qua ch6 giao cheo v& m6i ben la 1 m.

9 1 1 P h ii dot cap trong r%nhcap x i y hoac duc b h g betdng nhOng nwi khdng tien dao xwi khi c%n

b i o tri ho c thay thQ cap. R% nhcap p h ii c6 nsp dgy b h g hm Ban betdng hoac thm thep ch6ng trwn

triv khu vy c dwwi day t i , b in g dien.

9 12 NQU %nhcap co day khdng s i u qua 500 mm so vwi mat san hoan thign thi co th6 Bat cap tryc

tibp trgn day r%nh ap.

9 13 NQU r%nhcap co day s i u qua 500 mm so vwi mat san hoan thign thi phAi d4t cap tren cAc gia

d

c6 dinh vao thanh r%nhcap sau mBi c y ly 1 m. ~ h ti cAc gia

d

cap p h i i hAn vao thanh tibp dht chqy

su6t dgc chi&u dai r3nh cap.

9 14 Cap lubn qua thanh r3nh cap d& di ra ngoa i p h i i lubn trong 6ng civng co migng nhdn, khdng c6

cqnh

S C

hoac thd rap (lam hw t6n cach dign clia cap).

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201

2

9 15 ay c6a ri nh cap ph li dbc v phia cac hb ga hogc ch8 Bat bum nlvwc m n g

va

phdi tinh d6n k h l

n2ng m b reng c8ng trinh trong twwng lai