24-dewa installation regulstions1997

8/10/2019 24-Dewa Installation Regulstions1997

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DUBAI ELECTRICITY AND WATER AUTHORITY

(DEWA)

REGULATIONS

FOR ELECTRICAL INSTALLATIONS

1997 EDITION

P.O. BOX 564

DUBAI

UNITED ARAB EMIRATES


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INTRODUCTION

T!" #$!%!&' "#*"#$#" %# +WIRING REGULATIONS FOR ELECTRICALINSTALLATIONS AND APPRO,ED CODE OF PRACTICE IN DUBAI- !""#$ !'

%# #/* 1905 %# %#' DUBAI ELECTRICITY COMPANY.

T# &2#3% & %# *#/%!&'" !" %& *&!$# 3&'"%/'%"8 3&'%*/3%&*"8 !*#:#' /'$

3&'":#*" !% / #'#*/ !$# &* 3&:!/'3# !% DEWA *#;!*#:#'%" &*

##3%*!3/ !'"%//%!&'" !' &*$#* %& "/#/*$ #*"&'" /'$ **% *&: /


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C O N T E N T S

CLAUSE DESCRIPTION PAGE

INTRODUCTION !

CONTENTS !!8!!!8!

SECTION 1: GENERAL REQUIREMENTS

1.1 S3 1

1.1 E#3%*!3!% S 2

1.2 A:!#'% C&'$!%!&'"

1.3 A*$ 3&'%*/3%&* 2

1.4 W&*=:/'"! 2

1.5 S%/'$/*$" &* #;!:#'%" /'$ :/%#*!/" 2

1.6 S:!""!&' & $*/!'" 31.7 P* /3%&* (PF) 3&**#3%!&'. 3

1.8 U'$#* &%/# (U,) *#/" !% /%& *#"#% %!:#* 3

1.9 H/*:&'!3" /'$ */!$ &%/# 3/'#" 3

1.10 I'"#3%!&' /'$ %#"%!' & I'"%//%!&'" 4

1.11 M/!'%#'/'3#8 #*!&$!3 !'"#3%!&' /'$ %#"%!' 4

1.12 E>%#'"!&'" /'$ /%#*/%!&'" 4

SECTION 2: DEFINITIONS 5 TO 9

SECTION 3: DEWA INCOMING SUPPL ANDTARIFF METERING

3.1 G#'#*/

3.2 P&!'% & "

3.3 T/*! :#%#*!'

SECTION 4: SELECTION OF CA!LES" EQUIPMENT" MATERIALS

AND WIRING SSTEMS

4.1 G#'#*/4.2 C/#" /'$ 3&'$3%&*"4.2.1 S##3%!&'4.2.2 M!'!:: "!&"#$ T& H! T#:#*/%*#"

4.2.6 W!*!' I'"%//%!&'" I' H/


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2. D#%/!" & 3&''#3%#$ &/$@ :/>!:: $#:/'$ (&*:/%)

3. L&/$ $!"%*!%!&' "3#$# /"# (&*:/%)

4. L&/$ $!"%*!%!&' "3#$# 1 /"# ( &*:/%)

5. E#3%*!3/ ":&"

6. C&'%*/3%&*?" !'"#3%!&' 3#*%!!3/%# (&*:/%)

7. A) T!3/ /**/'#:#'% & :#%#*!' 3/!'#% &' 3&:&'$ /

!) T!3/ /**/'#:#'% & WH :#%#* !' ##3%. S#*!3# *&&:C)T!3/ E#3%*!3/ "#*!3# *&&: !% 1 N& MDB.

D)T!3/ ##3%*!3/ "#*!3# *&&: !% 1 N& 3!3/ %# L.,

S!%3#/* /'#.

0. S*+*,-'/ ,+*

T+*)1 S!'# 3&*# P,C !'"/%#$ '&' /*:&*#$ "%*/'$#$

C* 3/#".

T+*)2 M%! 3&*# /*:&*#$ P,C !'"/%#$ 3* 3/#"

T+*)3 M%! 3&*# /*:&*#$ XLPE !'"/%#$ 3* 3/#"

9. C&&* !$#'%!!3/%!&' & /*:&*#$8 '/*:&*#$ /'$ A'$ #>!# 3/# 3&*#" /'$ /*# 3&'$3%&*"

10. "#3!!3/%!&' & MDB"@ SMDB" (&*:/%)11. S#3!!3/%!&' & DB" (&*:/%)12. E/*% 3&'%!'!% 3&'$3%&*" (ECC) /'$ #;!&%#'%!/

B&'$!' 3&'$3%&*".

13 E/*% #/=/# *&%#3%!&'

14 S/3!' & "&*%" &* %*'=!'8 3&'$!%" /'$ 3/#"

15 N:#* & 3/#" %/% :/ # !'"%/#$ !' %*'=!'

C&'$!%" /'$ 3/# %*/".16 D/%/ S3#$# &* L, ##3%*!3!% :#%#*" /'$ 3**#'%

T*/'"&*:#*".

'

SECTION 1

GENERAL REQUIREMENTS


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1.1 SCOPE

T# *#/%!&'" / %& %# *#;!*#:#'%" & / ##3%*!3/ !'"%//%!&'" !' &* /&%

B!$!'" /'$ /' /$$!%!&'"8 /%#*/%!&'" /'$ #>%#'"!&'" %& %# #>!"%!' !$!'" /'$

I'"%//%!&'" %#*#!'8 !' %# E:!*/%#" & D/!.

I'"%//%!&'"8 #*#!' 3&'"%*3%!&' & H! &%/# " "%/%!&'" !" *#;!*#$8 "/ #R##**#$ %& DEWA /% %# *#!:!'/* $#"!' "%/# &* !'3&*&*/%!' /' "#3!!3

*#;!*#:#'%" .

T# *#/%!&'" /*# '&% !'%#'$#$ %& %/=# %# /3# & / $#%/!#$ "#3!!3/%!&' &* %&

I'"%*3% '%*/!'#$ #*"&'" &* %& *&!$# &* ##* 3!*3:"%/'3#. W#*# / $!!3% &*

S#3!/ "!%/%!&' /*!"#" !3 !" '&% 3*#$ &* /$ &* !' %# *#/%!&'"8 %#

DEWA :/ # "&% %& &%/!' "#3!!3 /$!3#.

1.2 ELECTRICIT SUPPL

T# '&:!'/ ##3%*!3 " &%/# *&: DEWA !" @0 1 8 5 H!"%!' @0, ""%#: "/ # %&/*$" %#IEC0 *#3&::#'$#$ /# & @ 4 , 1 8 5 H


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A #;!:#'%8 //*/%"8 :/%#*!/" /'$ /33#""&*!#" "#$ !' %# ##3%*!3/ !'"%//%!&'"

"/ # "!%/# &* %# *&"# !'%#'$#$ /'$ 3//# & */%!' !% "/%!"/3%&*

#*&*:/'3# !' %# 3!:/%!3 3&'$!%!&'" & %# #:!*/%#" & D/! !3 /*# /" &&"

A%!%$# S#/ ## (3&/"%/)

M/> &%$&&* /:!#'% T#:.("/$#) 40JC

M!'. A:!#'% A!* T#:. .0JC M/>. A:!#'% A!* T#:. 40JC

M/>. A#*/# * 4 &*" 7.0JC

M/>. A#*/# * &'# #/* 6.9JC

R#/%!# H:!$!% 1 (M/>)

T'$#* S%&*: P#* Y#/* O33/"!&'/

E/*% ;/3= &/$!' .7

W!'$ "##$ 45 : /% 1 : #!%

G*&'$ T#:#*/%*# 5JC (/% .9 : $#%)

S&! %#*:/ R#"!"%!!% JC@:@

H#/ 3&'$#'"/%!&' /'$ "/'$ "%&*:" /"& *#/!.

1.4 APPRO&ED CONTRACTORS

E/3 3&'%*/3%&* & '$#*%/=#" ##3%*!3/ !'"%//%!&'" !" *#;!*#$ %& /# /% #/"% &'#

##3%*!3/ #'!'##*@ ##3%*!3!/' & &$" / /!$ 3&:#%#'3 !3#'"# !""#$

DEWA /'$ !" *#"&'"!# &* 3&**#3% !'"%//%!&' /'$ "/ "#*!"# /'$ %#"% %# #'%!*#

##3%*!3/ &*=". T# 3&:#%#'3 !3#'"# ! # !""#$ DEWA &' %& %&"#

!'$!!$/" & ! %# *#;!*#:#'%" "#%&*% DEWA8 3/' '$#*"%/'$ /'$/ DEWA?" R#/%!&'".

1.5WOR$MANS#IP

A ##3%*!3/ !'"%//%!&'" "/ # 3/**!#$ &% !' / '#/%8 &*$#* &*=:/' !=# :/''#*.

C/*# /%%#'%!&' "/ # /!$ %& :#3/'!3/ #>#3%!&' & %# &*= !' 3&''#3%!&' !%

/' ##3%*!3/ !'"%//%!&'.

1.6STANDARDS FOR EQUIPMENT AND MATERIALS

A ##3%*!3/ !'"%//%!&' "/ 3&: !% %# *#;!*#:#'%" & %# *#/%!&'"8

*##/'% DEWA? %#3'!3/ "#3!!3/%!&'"8 /%#"% #$!%!&' & %# IEE !*!' *#/%!&'"8

/'$ /' *#/%!&'" !""#$ DEWA *&: %!:# %& %!:#. I' 3/"# & 3&'%*/$!3%!&'8

DEWA? *#/%!&'" "&$ *#/!.

A #;!:#'%8 //*/%"8 /'$ /33#""&*!#" 3&:!' !% 3**#'% "%/'$/*$" ;&%#$ !'

A#'$!> 1 /'$@ &* 3&'*&'%!' %& *##/'% IEC (!'%#*'/%!&'/ ##3%*& %#3'!3/

3&::!""!&' ) /'$ ISO (!'%#*'/%!&'/ "%/'$/*$" &*/'!


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B#&*# %# 3&::#'3#:#'% & /' ##3%*!3/ !'"%//%!&'"8 /*# &* ":/8 '# &*

/$$!%!&'/8 &&!' $#%/!" /'$ $*/!'" & %# *&&"#$ !'"%//%!&'" "/ #

":!%%#$ %& DEWA8 &* *#!# /'$ /*&/ %#*#%&

! ) C&''#3%#$ &/$@:/>. $#:/'$ !' %# *#"3*!#$ &*: !#' !' /#'$!>

!!) S!'# !'# $!/*/:8 "&!' L, $!"%*!%!&' /'$ %/*!(WH):#%#*!'(*##* %& /#'$!>58 &* ":&") /'$ *##/'% %#3'!3/ "#3!!3/%!&'".

!!!) L&/$ $!"%*!%!&' "3#$#@" & !'/ $!"%*!%!&' &/*$@" /" #* *#"3*!#$

&*:"8 !#' !' /#'$!> K 4.

!) G#'#*/ /**/'#:#'%" /'$ $!:#'"!&'/ /&% & ##3%*!3/ "!%3 *&&:@"

/'$ &* #'3&"*#@" !% WH :#%#*!' /3!!%!#"8 /" /!3/#.

) S!%# "#%%!' &% /'@ =# /' !% $#%/!" & / #>%#*'/ ##3%*!3/

"#*!3#"

!) W!*!' /&% & %# !'"%//%!&'.(*##* %& /#'$!>58 &* ":&")

T# $#"!' /'$ /&% $*/!'" & ""%/%!&'" !3 /*# "#3!!#$ &* !'$!!$/

!'"%//%!&'"8 "/ /"& # *#/*#$ !' 3&:!/'3# !% DEWA?" *#/%!&'" &* ""%/%!&'"8 /'$ ":!%%#$ !' /$/'3# &* /*&/.

1.8 POWER FACTOR P.F CORRECTION.

T# */ * /3%&* & / 3&'":#* !'"%//%!&'" "/ # :/!'%/!'#$ !%!' .9

/!' /'$ '!%.

G#'#*/ / 3#'%*/ /!* 3&'$!%!&'!' /'%"8 !'$& /'$ "!% %# /!* 3&'$!%!&'!'

'!%"@ #;!:#'% "/ !'3&*&*/%# !'%#*/ :#/'" %& &* * /3%&* 3&**#3%!&' %&/3!## /'$ :/!'%/!' / * /3%&* '&% #"" %/' .9 /!' %*&&% %#!* '&*:/

&*=!' */'#.

A !% !%%!'" !% $!"3/*# /:"8 :#*3* /&* @ "&$!: /&*8 &*#"3#'%

%#"8 #%3 "/ !'3&*&*/%# 3//3!%&*" %& &%/!' / * /3%&* & .9 &* /

/!'. G!$# !'#" &' *#;!*#:#'%" & P.F !:*:#'% !" /"& !#' !' "#3%!&' 0.1

& %# *#/%!&'.

1.9 UNDER &OLTAGE U& RELAS WIT# AUTO RESET TIMER

A /!* 3&'$!%!&'#*" &* /!* 3&'$!%!&'!' '!%" @ /'%"@ #;!:#'% !'"%/#$ !%!' %#

3&'":#* !'"%//%!&' "/ # *&!$#$ !% U., *#/" !% /%&*#"#% %!:#*. T#

!$#!'#" &' *#;!*#:#'%" & U, *#/" /*# /"& !#' !' "#3%!&' 0. & %#

*#/%!&'".

1.10 #ARMONIC S AND RAPID &OLTAGE C#ANGES

H/*:&'!3" & %# " &%/# /*# 3/"#$ :/!' 3&'":#*?" '&' !'#/* &/$"

3&''#3%#$ %& %# " ""%#:.A 3&'":#* !" '&% /$ %& 3/"# $#!/%!&'" & %# &%/# 3/*/3%#*!"%!3" &%#* %/'

%&"# /$ !' E*/' "%/'$/*$" EN 5168 N&. 1994. A' #>3#"" $#!/%!&'

"/ # 3&:#'"/%#$ %# 3&'":#* /% !" &' 3&"%.


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1.11 INSPECTION AND TESTING OF INSTALLATION

C&'%*/3%&*" /*# *#;!*#$ %& ":!% %#!* +I'"#3%!&' C#*%!!3/%#"- !' %# *#"3*!#$

&*:"8 !#' !' /#'$!>68 &' 3&:#%!&' & %# ##3%*!3/ !'"%//%!&'". A!'"%//%!&'" /'$ #;!:#'% %#*#!'8 "/ # "2#3% %& DEWA?" !'"#3%!&'8 %#"%!' /'$

!'/ /*&/ #&*# 3&''#3%!' %# ##3%*!3 ".

T# !*"% %#"%!' /'$ !'"#3%!&' DEWA :/ # *## & 3/*# . A !'"%//%!&'

!3 *#;!*# *# !'"#3%!&' /'$ *# %#"%!' :/ # 3/*#$ &* #/3 ""#;#'%

!'"#3%!&'8 /"#$ &' %# %# & 3&'":#* !'"%//%!&'8 3&''#3%#$ &/$8 #%3. /'$ /"

"#3!!#$ !' *#/%!&' .1.1 & "#3%!&'

1.12 TENANCE" PERIODIC INSPECTION AND TESTING

M/!'%#'/'3#8 #*!&$!3 !'"#3%!&' /'$ %#"%!' & ##* !'"%//%!&' "/ # 3/**!#$ &%

%& #'"*# "/#% /'$ "/%!"/3%&* #*&*:/'3#. T# *#;#'3 *!&$!3 !'"#3%!&'

/'$ %#"%!' & /' !'"%//%!&' "/ # $#%#*:!'#$ %# %# & !'"%//%!&' 8 !%" "#

/'$ */%!&'8 %# *#;#'3 & :/!'%#'/'3# /'$ %# #>%#*'/ !'#'3#" %& !3 !% !"

"2#3%#$. I'$"%*!/ /'$ 3&::#*3!/ !'"%//%!&' "/ /% #/"% # !'"#3%#$ ##* %&

#/*" /' !'$##'$#'% 3&'"%/'%@ 3&'%*/3%&*. T# 3&'"%/'%@ 3&'%*/3%&* &* #*"&'

*#"&'"!# &* %# :/!'%#'/'3#8 !'"#3%!&' /'$ %#"%!' "/ *#&*% %& DEWA8 !'

*!%!'8 /' $##3%" &'$ !' *#/%#$ /*%" & %# #>!"%!' !'"%//%!&'" /'$ %#!*

*#3%!!3/%!&'8 %%#* !% / "3#$# & %#"% *#"%".E#* !'"%//%!&' "/ /"& "/ /"& # "2#3% %& #*!&$!38 */'$&: !'"#3%!&'

DEWA. T# 3&'":#* "/ /**/'# *#3%!!3/%!&' & %# $##3%"8 ! /' 8 '&%!!#$

DEWA8 /% !" &' 3&"%.

1.13 E(TENSIONS AND ALTERATIONS

T# 3&'":#* "/ '&% :/=# /' #>%#'"!&'" &* /%#*/%!&'" %& !" ##3%*!3/

!'"%//%!&'" !%&% &%/!'!' *!&* /*&/ *&: DEWA.

A!3/%!&' !' DEWA?" *#"3*!#$ &*: "/ # ":!%%#$ &* ##* *&2#3% @!'"%//%!&' /%"#*8 /*# &* ":/8 '# &* /$$!%!&'8 &* *&!"!&' & DEWA?"

" !'#" /'$ #;!:#'%8 "2#3% %& %#*:" /'$ 3&'$!%!&'" !""#$ DEWA *&:

%!:# %& %!:#.


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4

SECTION)2DEFINITIONS

F&&!' $#!'!%!&'" "/ / &* %# *&"# & %# *#/%!&'".

ACCESSORY. A $#!3#8 &%#* %/' 3**#'% "!' #;!:#'%8 /""&3!/%#$ !% "3

#;!:#'% &* !% %# !*!' & /' !'"%//%!&'.

AMBIENT TEMPERATURE T# %#:#*/%*# & %# /!* &* &%#* :#$!: #*# %#

#;!:#'% %& # "#$.

APPLIANCE A' !%#: & 3**#'% "!' #;!:#'% &%#* %/' / :!'/!*# &* /'

!'$##'$#'% :&%&*.

ARM?S REACH A


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CONDUIT A /*% & 3&"# !*!' ""%#: &* 3/#" !' ##3%*!3/ !'"%//%!&'"8

/&!' %#: %& # $*/' !' /'$ @ &* *#/3#$8 % '&% !'"#*%#$ /%#*/.

5

CURRENT CARRYING CAPACITY OF A CONDUCTOR T# :/>!:: 3**#'%8

!3 3/' # 3/**!#$ / 3&'$3%&* '$#* "#3!!#$ 3&'$!%!&'" !%&% !%" "%#/$ "%/%#

%#:#*/%*# #>3##$!' / "#3!!#$ /#.

CURRENT USING EUIPMENT T# #;!:#'%8 !3 3&'#*%" ##3%*!3/ #'#*

!'%& /'&%#* &*: & #'#*8 "3 /" #/%8 !% &* :&%!# *.

DISTRIBUTION BOARD A' /""#: 3&'%/!'!' "!%3!' &* *&%#3%!# $#!3#"

(#.. "#"8 3!*3!% *#/=#*"8 *#"!$/ 3**#'% */%#$ $#!3#") /""&3!/%#$ !% &'# &*

:&*# &%&!' 3!*3!%" #$ *&: &'# &* :&*# !'3&:!' 3!*3!%"8 %%#* !%

%#*:!'/" &* %# '#%*/ /'$ *&%#3%!# 3!*3!% 3&'$3%&*". I% :/ /"& !'3$#

"!'/!' /'$ &%#* 3&'%*& $#!3#". M#/'" & !"&/%!&' :/ # !'3$#$ !' %# &/*$

&* :/ # *&!$#$ "#/*/%#.

DOUBLE INSULATION I'"/%!&' 3&:*!"!' &%8 /"!3 !'"/%!&' /'$

"#:#'%/* !'"/%!&'.

DUCT A 3&"#$ /""/#/ &*:#$ '$#**&'$ &* !' %# "%*3%*# /'$ !'%#'$#$ %&

*#3#!# &'# &* :&*# 3/#" !3 :/ # $*/' !'.

EARTH T# 3&'$3%!# :/"" & %# #/*%8 &"# ##3%*!3 &%#'%!/ /% /' &!'% !"

3&'#'%!&'/ %/=#' /" %*/'#&"

3&'$3%!# /*%" !' / 3!*3!%8 !3 !" ##3%*!3/ "&'$. T!" 3**#'% :/ /# /

3//3!%!# 3&:&'#'%8 !'3$!' %/% *#"%!' *&: %# $#!#*/%# "# & 3//3!%&*".

EARTHING C&''#3%!&' & %# #>&"#$ 3&'$3%!# /*%" & /' !'"%//%!&' %& %#

:/!' #/*%!' %#*:!'/ & %# !'"%//%!&'.

EARTHING CONDUCTOR A *&%#3%!# 3&'$3%&* 3&''#3%!' %# :/!' #/*%!'

%#*:!'/ & /' !'"%//%!&' %& /' #/*% ##3%*&$# &* %& &%#* :#/'" & #/*%!'.

ELECTRIC SHOC A $/'#*&" "!&&!3/ ##3% *#"%!' *&: /""!' /'

##3%*!3 3**#'% %*& :/' &$ &* !# "%&3=.

6


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ELECTRICAL INSTALLATION A' /""#: & /""&3!/%#$ ##3%*!3/ #;!:#'%

"!#$ *&: / 3&::&' &*!!' %& ! / 3&::&' / "#3!!3 *&"# /'$ /!'

3#*%/!' 3&&*$!'/%#$ 3/*/3%#*!"%!3".

EMERGENCY SWITCHING A' */%!&' !'%#'$#$ %& *#: /" ;!3= /"

&""!#8 $/'#*8 !3 :/ /# &33**#$ '#>#3%#$.

ENCLOSURE A /*% *&!$!' *&%#3%!&' & #;!:#'% //!'"% 3#*%/!' #>%#*'/

!'#'3#" /'$ !' /' $!*#3%!&'8 *&%#3%!&' //!'"% $!*#3%" 3&'%/3%

EUIPMENT A' !%#: & "3 *&"# /" #'#*/%!&'8 3&'#*"!&'8 %*/'":!""!&'8

$!"%*!%!&' &* %!!&"#$3&'$3%!# /*%" /'$ #>%*/'#&" 3&'$3%!# /*%" /% ""%/'%!/ %# "/:# &%#'%!/.

EXPOSED CONSUCTI,E PARTS A 3&'$3%!# /*% & /' #;!:#'% !3 3/' #

%&3#$ /'$ !3 !" '&% / !# /*% % !3 :/ #3&:# !# '$#* /%

3&'$!%!&'".

EXTRNAL INFLUANCE A' !'#'3# #>%#*'/ %& /' ##3%*!3/ !'"%//%!&' !3

##3%" %# $#"!' /'$ "/# */%!&' & %/% !'"%//%!&'.

FAULT A 3!*3!% 3&'$!%!&' !' !3 3**#'% &" %*& /' /'&*:/ &* '!'%#'$#$

/%. T!" :/ *#"% *&: /' !'"/%!&' /!*# &* *!$!' & !'"/%!&'.

C&'#'%!&'/ !:#$/'3# #%##' !# 3&'$3%&*" &* #%##' !# 3&'$3%&* /'$

#>&"#$ &* #>%*/'#&" 3&'$3%!# /*%" /% %# /% &"!%!&' !" 3&'"!$#*#$ '#!!#.

FAULT CURRENT A 3**#'% *#"%!' *&: / /%.

FINAL CUIRCUIT A 3!*3!% 3&''#3%#$ $!*#3% %& 3**#'% "!' #;!:#'%8 &* %& /

"&3=#% &%#% &* "&3=#% &%#%" &* &%#* &%#% &!'%" &* %# 3&''#3%!&' & "3#;!:#'%.

FIXED EUIPMENT E;!:#'% $#"!'#$ %& # /"%#'#$ %& / "&*% &* &%#*!"#

"#3*#$ !' / "#3!!3 &3/%!&'.

FLEXIBLE CABLE A 3/# &"# "%*3%*# /'$ :/%#*!/ :/=# !% "!%/# %& #

#>#$ !# !' "#*!3#.

FLEXIBLE CORD A #>!# 3/# !' !3 %# 3*&"" "#3%!&'/ /*#/ & #/3

3&'$3%&* $" '&% #>3##$ 4 ::.


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INSULATION S!%/# '&' 3&'$3%!# :/%#*!/ #'3&"!'8 "**&'$!' &*

"&*%!' %# 3&'$3%&*.

ISOLATION A :#3/'!3/ "!%3!' $#!3#8 !3 !' %# ' &"!%!&' 3&:!#"

!% %# *#;!*#:#'%" & !"&/%!&'. A' !"&/%&* &%#*!"# !" ='&' /" $!"3&''#3%#*.

LI,E PARTS A 3&'$3%&* &* 3&'$3%!# /*% !'%#'$#$ %& # #'#*!!!/*!#" %%#* !% %# :#/'" &* 3&''#3%!' %#: %& ". F&* %# *&"# &

%# *#/%!&' / /: &$#*8 #* "&*%#$8 !" $##:#$ %& # / :!'/*!#".

L., SWITCHGEAR K CONTOLGEAR ASSEMBLY A 3&:!'/%!&' & &'# &* :&*#& &%/# "!%3!' $#!3#" %%#* !% /""&3!/%#$ 3&'%*&8 :#/"*!'8 "!'/!'8

*&%#3%!#8 *#/%!' #;!:#'%8 #%3. 3&:#%# /""#:#$ '$#* %# *#"&'"!!!%

& %# :/'/3%*#* !% / %# !'%#*'/ ##3%*!3/ /'$ :#3/'!3/ !'%#*3&''#3%!&'"

/'$ "%*3%*/ /*%". T# /""#: :/ # %# %#"%#$ &* /*%!/ %# %#"%#$ ( "## BS

5406 /*%1).

MAIN EARTHING TERMINAL T# %#*:!'/ &* %# /* *&!$#$ &* %# 3&''#3%!&'

& *&%#3%!# 3&'$3%&*"8 !'3$!' #;!&%#'%!/ &'$!' 3&'$3%&*"8 /'$ 3&'$3%&*"

&* '3%!&'/ #/*%!'8 ! /'8 %& %# :#/'" & #/*%!'.

NEUTRAL CONDUCTOR T# '#%*/ 3&'$3%&* & / /"# 4 !*# ""%#:&* %#

3&'$3%&* & / "!'# /"# !'"%//%!&'8 !3 !" #/*%#$ /% %# "&*3# & ".

NON COMBUSTIBLE A '&' 3&:"%!# :/%#*!/ !" &'# !3 !" '&% 3//# &

'$#*&!' 3&:"%!&' /'$ "/%!"!#" %# #*&*:/'3# *#;!*#:#'%" 3&:!' !%

BS 476 /*%4 K /*%5.

NOMINAL ,OLTAGE ,&%/# !3 /' !'"%//%!&'(&* /*% & /' !'"%//%!&') !"$#"!'/%#$. T# &&!' */'#" & '&:!'/ &%/# ( *.:." /# &* /.3) /*# $#!'#$.

E- L.N&*:/ '&% #>3##$!' 5 , /.3 &* 1 , *!# *## $.3.8 #/%#*

B#%##' 3&'$3%&*" &* E/*%.

L . N&*:/ #>3##$!' #>%*/ & &%/# % '&% #>3##$!' 1 ,

/.3. &*15 $.3. #%##' 3&'$3%&*"8 &* 6 /.3. &* 9 $.3.

#%##' 3&'$3%&* /'$ E/*%.

T# /3%/ &%/# & %# !'"%//%!&' :/ $!#* *&: %# '&:!'/ /# / ;/'%!%

!%!' '&*:/ %*/'3#".

8


14/61

O,ERCURRENT A 3**#'% #>3##$!' %# */%#$ /#. F&* 3&'$3%&*" %# */%#$ /#

!" %# 3**#'% 3/**!' 3//3!%.

O,ERLOAD CURRENT A' * 3**#'% &33**!' !' / 3!*3!%8 !3 !" ##3%*!3/

"&'$.

POINT (!' !*!') A %#*:!'/%!&' & %# !>#$ !*!' !'%#'$#$ &* %# 3&''#3%!&' &

%# 3**#'% "!' #;!:#'%.P,C (/" !'"/%!&' &* "#/% & 3/#) P&!' 3&*!$# 3&:&'$ 3&:!' BS

6746.

PROTECTI,E CONDUCTOR@ EARTH CONTINUITY CONDUCTOR ECC A

3&'$3%&* "#$ &* "&:# :#/"*#" & *&%#3%!&' //!'"% ##3%*!3 "&3= /'$ !'%#'$#$

&* 3&''#3%!' %%#* /' & %# &&!' /*%".

!) E>&"#$ 3&'$3%!# /*%".

!!) E>%*/'#&" 3&'$3%!# /*%".

!!!) T# :/!' #/*%!' %#*:!'/.

!) E/*% ##3%*&$#(").

) T# #/*%#$ &!'% & %# "&*3#8 &* /' /*%!!3!/ '#%*/.RESIDUAL CURRENT %# #3%&* ": & %# !'"%/'%/'#&" /#" & 3**#'%

&!' %*& / !# 3&'$3%&*" & / 3!*3!% /% / &!'% !' %# ##3%*!3/ !'"%//%!&'.

RESIDUAL CURRENT DE,ICE A :#3/'!3/ "!%3!' $#!3# &* /""&3!/%!&' &

$#!3#" !'%#'$#$ %& 3/"# %# '!' & %# 3&'%/3%" #' %# *#"!$/ 3**#'% /%%/!'"

/ !#' /# '$#* "#3!!#$ 3&'$!%!&'".

RESISTANCE AREA (&* /' #/*% ##3%*&$# &') T# "*/3# /*#/ & *&'$

(/*&'$ /' #/*% ##3%*&$#) &' !3 / "!'!!3/'% &%/# */$!#'% :/ #>!"%.

RING CIRCUIT A 3!*3!% /**/'#$ !' %# &*: & / *!' %& / "!'# &!'% & ".

SHORT CICUIT CURRENT A' * 3**#'% *#"%!' *&: / /% & '#!!#!:#'$#'3# #%##' !# 3&'$3%&*" /!' / $!#*#'3# !' &%#'%!/ '$#* '&*:/

*/%!' 3&'$!%!&'".

SOCET OUTLET A $#!3# *&!$#$ !% #:/# 3&'%/3%"8 !3 !" !'%#'$#$ %& #

!'"%/#$ !% %# !>#$ !*!'8 /'$ !'%#'$#$ %& *#3#!# / . A :!'/!*# %*/3=

""%#: !" '&% *#/*$#$ /" / "&3=#% &%#% ""%#:.

SPACE FACTOR T# */%!& (#>*#""#$ /" / #*3#'%/#) & %# ": & %# ##3%!#

*/ 3*&"""#3%!&'/ /*#/ 3/#" &*:!' / '3 %& %# !'%#*'/ 3*&"""#3%!&'/ /*#/

& %# 3&'$!%8 !#8 $3%8 %*'=!' &* 3/''# !' !3 %# /*# !'"%/#$.

SWITCH A :#3/'!3/ $#!3# 3//# & :/=!'8 3/**!' /'$ *#/=!' 3**#'%'$#* '&*:/ 3!*3!% 3&'$!%!&'"8 !3 :/ !'3$# "#3!!#$ */%!' *&/$

3&'$!%!&'"8 /'$ /"& & 3/**!' 3**#'% &* / "#3!!#$ /'&*:/ 3!*3!% 3&'$!%!&'"

"3 /" %&"# & "&*% 3!*3!%. I% :/ /"& # 3//# & :/=!'8 % '&% *#/=!' "&*%

3!*3!% 3**#'%".

SWITCHBOARD A' /""#: & "!%3#/* !% &* !%&% !'"%*:#'%"8 % %#

%#*: $" '&% / %& *& & &3/ "!%3#" !' !'/ 3!*3!%.

SWITCHGEAR A' /""#: & :/!' /'$ />!!/* "!%3!' //*/%" &*

*/%!&'8 *#/%!&'8 *&%#3%!&' /'$ &%#* 3&'%*& & /' ##3%*!3/ !'"%//%!&'.

XLPE (/" !'"/%!&' & 3/#") C*&""!'=#$ %#'# 3&:!' !% BS 5467.

9


15/61

SECTION)3

DEWA INCOMING SUPPL AND TARIFF METERING

3.1 GENERAL

3.1.1 P* " *&: DEWA '#%&*= "/ # "2#3% %& %#*:"8 3&'$!%!&'"8 ##"8T/*!"8 /'$ !'"%*3%!&'" !""#$ DEWA *&: %!:# %& %!:#.

3.1.2 T# $#%/!" & '&:!'/ ##3%*!3 " *&: DEWA /'$ #'#*/ *#;!*#:#'%"8 &*

C&:!/'3#8 /*# "#3!!#$ !' S#3%!&'1 & %# *#/%!&'".

3.1.3 C&'":#* "/8 #&*# 3&::#'3#:#'% & !$!' 3&'"%*3%!&'8 &%/!' 3&'!*:/%!&' *&:

DEWA8 &' //!/!!% & * ".

3.1.4 I' #'#*/8 #*# %# %&%/ 3&''#3%#$ &/$ #>3##$" 4 W8 *&!"!&' "/ # :/$# !%!'

T# !$!' &* &% &* DEWA?" " "%/%!&'. I' "&:# 3!*3:"%/'3#" / " "%/%!&' :/ #

R#;!*#$ &* / 3&''#3%#$ &/$ & #"" %/' 4W. T#"# *#;!*#:#'%" "/ # 3&'!*:#$ !'%# !""# & DEWA?" '& &2#3%!&' 3#*%!!3/%#8 !3 "/ # *#/!$/%#$ /% %# #'$ & ##*

"!> :&'%" #*!&$.

3.1.5 T# 3&'":#* "/ %/=# / "%#" '#3#""/* %& *&%#3% /'$ =## "/# DEWA?" " !'#"

/'$ #;!:#'% /'$ "/ !::#$!/%# *#&*% /' $##3% !' &* $/:/# %& /' & DEWA?" !'#"

&* #;!:#'%.

3.2 POINT OF SUPPL

3.2.1 T# &!'% & " !3 $#!'#" %# &'$/* & DEWA #;!:#'% /'$ #*# ##3%*!3!%

I" :/$# //!/# %& %# 3&'":#* "/ # $#3!$#$ DEWA. P&!'% & " "/ # :/$#

//!/# &' /% &'# &3/%!&'8 !%!' / &%@ *&2#3%8 '#"" &%#*!"# /*$ @"#3!!#$

DEWA.

3.2.2 T# 3!*3!% *#/=#*@" /'$ @&* :/!' $!"%*!%!&' &/*$@" *&!$#$ /% %# !'3&:!' &!'%" &

S "/ # $#"!'#$ /'$ */%#$ %& "!% /*%!3/* /!3/%!&'" /'$ 3&:!' !%

*#/%!&'" "#3!!#$ !' 3/"# 4.5 K 7..

3.2.3 T# :/!' 3!*3!% *#/=#*@" /% %# &!'% & " (:/!' "!%3) "/ # :/*=#$ /" "3 /'$

I$#'%!!#$ *&: &%#* *#/=#*" %& */%# #/"! !' /' #:#*#'3. W#*# :&*# %/' &'#

I'3&:!' " !" //!/#8 !' /' *#:!"#" #/3 :/!' "!%3 "/ # :/*=#$ %& !'$!3/%#W!3 !'"%//%!&' &* "#3%!&' & %# !'"%//%!&' !% 3&'%*&".

3.2.4 W#*# / :/!' L, $!"%*!%!&' /'# !" 3&''#3%#$ $!*#3% %& %# & &%/# "!$# & %#

T*/'"&*:#*8 %# :/!' !'3&:#* 3!*3!% *#/=#* *&&"#$ !' L, /'# !" *#3&::#'$#$

T& # %&%/ !%$*/ /# %# /!* 3!*3!% *#/=#*.

3.2.5 W#*# 3&'":#*?" :/!' & &%/# $!"%*!%!&' &/*$@/'# !" 3&''#3%#$ %& DEWA?" %&

&* :&*# $!"%*!%!&' %*/'"&*:#*"8 "#/*/%# " "#3%!&' !% :#3/'!3/ /'$ ##3%*!3/

!'%#*&3=#$ " "#3%!&' *#/=#*" @!"&/%&*" "/ # *&!$#$.

10


16/61

3.2.6 A !'3&:!' 3/# %#*:!'/%!&'"@!# 3&''#3%!&'" &' :#%#*!' 3/!'#%" /'$ &%#* :/!' /'$

S :/!' $!"%*!%!&' &/*$" "/ # /$#;/%# "*&$#$ /'$ !'"/%#$.

A #>&"#$ !# %#*:!'/" 3&''#3%!&'" /'$ " /*" !' /' & &%/# $!"%*!%!&' &/*$

S/ # "*&$#$ /'$ !'"/%#$ %& DEWA?" /*&/.

3.2.7 C&'":#*?" :/!' /'$ " :/!' /'#"@ $!"%*!%!&' &/*$@" "/ # !'"%/#$ !' &3/%!&'8 %&

W!3 /33#"" !" //!/# /% / %!:#". A :!'!:: "/3# & 15 :: "/ # *&!$#$ !'

*&'% /'$ 75 :: &' %# "!$#"8 %& #*:!% "/# */%!&'8 !'"#3%!&'8 %#"%!' /'$ :/!'%#'/'3#8

&* 3!3/ %# /'#" @"!%3 &/*$". P/'#" !% *#/* /33#"" $&&*" "/ /#8 !' /$$!%!&'8

/ :!'!:: "/3# & 75 :: !' %# *#/*. T# :&'%!' #!% (%& %# %& & %# &/*$@")

"/ '&*:/ # :#%#*" *&: %# *&'$@ &&* ##.

3.2.8 A ##3%*!3/ "!%3 *&&:" "/ # /$#;/%# #'%!/%#$ /'$ *&!$#$ !% '#3#""/* #/

$% #>/"% /'@" /'$ !*# *#"!"%/'%@ :#%/!3 *#$ $&&*@"8 /" /!3/#. A$#;/%# ##

& !:!'/%!&' "/ # *&!$#$ %& /3!!%/%# "/# */%!&' /% / %!:#".

3.2.9 I'3&:!' " 3/#@" %& %# 3&'":#* :/!' $!"%*!%!&' &/*$@" "/ # %&%/

S#*#/%#$ /'$ !$#'%!!#$ *&: %# 3&'":#*?" 3/#".

3.2.10 T#*:!'/%!&' & !'3&:!' " 3/# /% %# 3&'":#*?" :#%#*!' 3/!'#%@ :/!' $!"%*!%!&'

&/*$ (MDB) "/ # 3/**!#$ &% 3&'":#*?" 3&'%*/3%&*8 !' /33&*$/'3# !%

*#/%!&'7.1.0 /'$ 7. 1.9.

3.3 TARIFF METERING

3.3.1 F&* !'$!!$/ 3&'":#* *#:!"#"8 "3 /" !/"8 /*:"8 /*$#'"8 /33&::&$/%!&' &3=" #%38

%# :#%#*!' 3/!'#%8 !% :/!' !'3&:#* 3!*3!% *#/=#* /'$ :#%#*!' "/ # !'"%/#$

&%"!$#8 *#3#""#$8 !' %# 3&:&'$ /.

3.3.2 I' :%!# 3&'":#* *#:!"#" "3 /" *#"!$#'%!/ @ 3&::#*3!/@ !$!'"8 !'$"%*!#"8 /*#

U%!!% 3&:#>#"8 "3&&" #%3. %# :/!' /'$ " :/!' $!"%*!%!&' &/*$" !% /""&3!/%#$

M#%#*!' "/ # !'"%/#$ !' "#/*/%# ##3%*!3/ "!%3 *&&:"8 !' &3/%!&'" 3&"# %& %#

#'%*/'3# &'$/* !'# /'$ %& !3 /33#"" !" //!/# /% / %!:#" &* */%!&'8 %#"%!'8

I'"#3%!&'8 :/!'%#'/'3# /'$ *#/!*". P*!&* /*&/ "/ # &%/!'#$ *&: DEWA /"

S#3!!#$ !' 3/"# 1.7 & "#3%!&' 1 &* ##* "3 *#:!"#".

3.3.3 A %/*! :#%#*!' ! '&*:/ # *&!$#$ DEWA /'$ *#"%*!3%#$ %& &'# &* #/3

C&'":#* !'"%//%!&'8 '#"" &%#*!"# /*$ @"#3!!#$ DEWA.

3.3.4 T# :!'!:: "/3# *#;!*#$ &* !'"%//%!&' & WH :#%#* "/ # :: !$# /'$

4 :: !.

3.3.5 T# #'#*/ /**/'#:#'% /'$ $!:#'"!&'/ /&% & %# :#%#*!' 3/!'#% /'$ /**/ &

:#%#*" !'"%/#$ !' ##3%*!3/ "!%3 *&&:@" /'$ #'3&"*# /&' !% /""&3!/%#$ !*!' "/

B# "2#3% %& DEWA?" /*&/. T# %!3/ /**/'#:#'% & WH :#%#*!' 3/!'#% @WH

:#%#*" !#'8 &* !$/'3#8 !' /#'$!>7.

3.3.6 M#%#*!' :#/'" & 3**#'% %*/'"&*:#*" (CT") "/ # !'"%/#$ #*# %# 3!*3!% *#/=#*

R/%!' /% %# &!'% & " !" A:" /'$ / DEWA ! *&!$# %# = :#%#*@"

/'$ /""&3!/%#$ CT" &* / %/*! :#%#*!'. I' "&:# 3!*3:"%/'3#" 3&'":#* :/ # #*:!%%#$

%& *&!$# %# = :#%#* /'$ C.T"8 3&:!' !% DEWA %#3'!3/ "#3!!3/%!&' /'$ %#$/%/ "3#$# !#' !' /#'$!>16. T# / :#%#* /'$ C.T" "/ # %#"%#$ /'$ 3/!*/%#$

DEWA *!&* %& !'"%//%!&' /% "!%#.


17/61

11

T# C.T" "/ # &3/%#$ &' %# " /* & #/3 /"# %& #'/# #/" :/!'%#'/'3# /'$

*#/3#:#'% & C.T".T*## C.T" "/ # *&!$#$ &* #/3 :#%#*!'.

3.3.7 T# 3**#'% %*/'"&*:#*" & &&!' */%#$ %*/'"&*:/%!&' */%!& "/ # "#$ /" "%/'$/*$

*#;!*#:#'%

@5

@5

, 4@5

; 6@5

* 0@5

1@5

!:: &%/#.; A33*/3 3/"".

* R/%#$ &%% ,A).

T#*:!'/ ("#3&'$/* !'$!') !$#'%!!3/%!&' (S18 S)

%#*'/ $&&*@ 3*8 !3 "/ '&*:/ # & !'#$ %#. G#'#*/ /

//*/%"8 3!*3!% *#/=#*"8 !"&/%&*"8 " /*"8 *#: /# !$ "#3%!&'" & " /* %*'=!'

#%3.8 !'"%/#$ &' %# " "!$# &' /' DEWA?" :#%#*!' "/ /# *&!"!&' &* "#/!'

DEWA.

3.3.12 T# :#%#*!' "#3%!&' @3&:/*%:#'% !' / MDB@" ! /'$ #' !'3&*&*/%#$ !%!'8 "/

3&:#%# # "#*#/%#$ *&: &%#* "#3%!&'"@ 3&:/*%:#'%".

12


18/61

SECTION)4

SELECTION OF CA!LES " EQUIPMENT" MATERIALS" AND WIRING SSTEMS

4.1 GENERAL

4.1.1 A #;!:#'% /'$ :/%#*!/ "#$ !' ##3%*!3/ !'"%//%!&'" "/ & &&$ ;/!% .3&:!' !% %# *##/'% "#3%!&'"@ 3/"#" & %# *#/%!&'" !" / :!'!::

*#;!*#:#'%.

4.1. E#* !%#: & #;!:#'% "#$ !' %# !'"%//%!&' "/ # $#"!'#$ /'$ */%#$ &* */%!&'

&' %# '&:!'/ ##3%*!3 " &%/# $#3/*#$ DEWA.

4.2 CA!LES AND CONDUCTORS.

4.2.1 *+*,-'/

F&* #'#*/ *&"# /'$ !' '&*:/ "!%/%!&'" P,C @XLPE !'"/%#$8 "%/'$/*$ 3*

3&'$3%&* 3/#" 3&:!' !% BS 64 K BS 646@BS 5467 "/ # "#$ &* /!>#$ !*!' !'"%//%!&' & !$!'".

I' !'/::/#@ #>&"!# "!%/%!&'"8 %# 3/#" "/ # :!'#*/ !'"/%#$ 3*

"#/%#$ 3&:!' !% BS 67.

F#>!# 3/#" /'$ 3&*$" &* "# !' ##3%*!3/ !'"%//%!&'" "/ # P,C !'"/%#$ /'$

"#/%#$8 "%*/'$#$ 3* 3&'$3%&* 3&:!' !% BS 65@ BS 64.

C/#" &* 3&''#3%!&' #%##' 3#!!' *&"# /'$ /: &$#* &* #'$#'% %# !% !%%!'"

/'$ &* #'3&"#$ :!'/!*# "/ # #/% *#"!"%/'% "!!3&' *#* !'"/%#$ !% "%*/'$#$

3* 3&'$3%&* 3&:!' !% BS 6141.

F&* !%" /'$ "!:!/* /!3/%!&'" *#* !'"/%#$ &* P,C !'"/%#$ #>!# 3/#"

3&:!' !% BS 6977 "/ # "#$ .

WH :#%#* %/!" "/ '&*:/ # "!'# 3&*# P,C !'"/%#$ /'$ "#/%#$ 3/#"

3&:!' !% BS 648 /" "#3!!#$ !' R#/%!&' ..

S!'# 3&*# 3/#" /*:&*#$ !% "%## !*# &* %/# "/ '&% # "#$ &* /.3 3!*3!%".

4.2.2 M'/'>?> '@* ,/;?,-.

T# :!'!:: "!


19/61

13

T!3/ "##3%!&' & 3/#"8 *#3&::#'$#$ /" / :!'!::8 &* #'#*/*&"#

/!3/%!&'"8 !' %# E:!*/%#" & D/!8 !" !#' !' A#'$!> 08 %/#" 18 8 K .

T# :/>!:: &%/# $*& *&: %# &!'% & " %& /' &!'%@#;!:#'%8 /!/'3#

/'$ //*/%" 3&''#3%#$ !' %# !*!' !'"%//%!&' "/ '&% #>3##$ 4 & %# '&:!'/

&%/# & %# ##3%*!3 "8 '#"" &%#*!"# "#3!!#$.

4.2.4 C+ I;*/-'',-'/

T# 3&&* !$#'%!!3/%!&' & !'"/%#$ 3/# 3&*#" & '/*:&*#$ 8 /*:&*#$ /'$ #>!#

3/#" /'$ "###"8 /'$ &* $!"3 & /*# 3&'$3%&*" "/ # /" !#' !' A#'$!> .

4.2.5 W''/< I/-++-'/ E*; T #'*-?*

A' /*% & %# !*!' !'"%//%!&'" "3 /" %# !'$!!$/ 3!*3!% 3/#"8 !'/ 3&''#3%!&'

%& #;!:#'%8 /!/'3#" /'$ !% !%%!'" "/ # "!%/ */%#$ &* %#!* "/%!"/3%&*

#*&*:/'3# /% %#:#*/%*#" !=# %& # #'3&'%#*#$8 *&!$!' #/% *#"!"%/'% "###"@

#/$" &* !'$!!$/ 3&*#" /'$ @&* #/% *#"!"%/'% 3/#".

T# #/% *#"!"%/'% "###" /'$ 3/#" "/ # */%#$ &* */%!' %#:#*/%*#" '&% #""

%/' 05J3 8 /*%!3/* &* /' #'$ 3&''#3%!&'" %& :!'/*!#" !% !'3/'$#"3#'% /'$

/' /:" /'$ !>#$ #/%!' /!/'3#".

4.2.6 W''/< I/-++-'/ I/ #@;? A*.

A !% !%%!'" /'$ /33#""&*!#" /'$ &%#* ##3%*!3/ #;!:#'% &* "# !' &%#'%!/

H/


20/61

4.4 C+* T A/; S?-

4.4.1 S%## 3/# %*/"8 /33#""&*!#" /'$ "&*%" "/ '&*:/ # &% $! //'!


21/61

T# 3!*3!% *#/=#* /33#""&*!#"8 #%3. "/ #'#*/ 3&: !% %# "%/'$/*$" "#3!!#$ !'

A#'$!>1.

R#!*# /# %# "#" "/ '&% # #*:!%%#$ !' /' %# & !*!' !'"%//%!&'.

T# $#%/!" & /*/:#%#*" & %# !'$!!$/ #;!:#'% K 3&:&'#'%" /'$ %# DB"8 !' #'#*/

:/ /*&*!/%# # "##3%#$ /'$ "#3!!#$ /" #* %# %!3/ !$#!'#" !#' !' A#'$!>11

4.5 APPARATUS AND ACCESSORIES

4.6.1 S'-,=*

T# "!%3#" *&!$#$ &* &3/ !"&/%!&' & ##3%*!3/ " %& !'$!!$/ //*/%" /'$@

&* 3!*3!%" "/ 3&: !% BS 676. T# */%!' & %# "!%3#" "/ # "##3%#$ /"#$ &'

!'$!!$/ /!3/%!&'"8 "3 /" &* *#"!"%!# /'$ !'$3%!# &/$". T# :!'!:: 3**#'%

*/%!' "/ # 5 A.

F&* !'$"%*!/ "# %# "!%3#" "/ # :#%/ 3/$. W#/%#* *&& "!%3#" "/ # "#$ &*

/ &%$&&* !'"%//%!&'".

S!%3#" !'"%/#$ &* 3&'%*& & $!"3/*# !%!' "/ /# / 3**#'% */%!' '&% #"" %/'

%!3# %# "%/%# 3&'%!'&" 3**#'% & %# 3!*3!%".

4.6.2 P+?'+ E+*,-',+ A+'/,*

T# ##3%*!3/ /!/'3#" "3 /" /%#* #/%#*"8 3&&=#*"8 &%/%#"8 #%3 !3 /*# "#$ !'

3&'":#* !'"%//%!&' "/ #'#*/ 3&: !% BS 456.

16


22/61

4.6.5 C/-+ O W-* #*-*

D "!%3#" (!% '#&' !'$!3/%&*) & /*&*!/%# */%!' "/ # *&!$#$ &*

3&'%*& & /%#* #/%#*". T# !'/ 3&''#3%!&' %& %# #/%#*" "/ # :/$# *&: / #>

&%#% /%# :&'%#$ /$2/3#'% %& %# #/%#*. T# 3&'%*& "!%3 &* /%#* #/%#* "!%/%#$@

!'"%/#$ !' / /%*&&: &* %&!#% "/ # !'"%/#$ !::#$!/%# &%"!$# %# /%*&&:@ %&!#%.

W/%#* #/%#* "/ # 3&''#3%#$ %& / "#/*/%# !'/ " 3!*3!% *&: %# $!"%*!%!&' &/*$.

T# #/%#* "/ !'3&*&*/%# /' !'%#*/ #/*%!' %#*:!'/ /$2/3#'% %& %# /"# /'$ '#%*/

%#*:!'/". A %#*:!'/" "/ # &"#$ !' "!%/# *#3#"" !% / "/" *&& *#: /#

3*. A :A RCCB@ELCB "/ *&%#3% ##* #/%#* 3!*3!%.

4.6.6 C/-+ O A' C/;'-'/'/< U/'- E?'>*/-

A 15 /:" "!%3 "&3=#% &%#% "/ # *&!$#$ &* *&&: /!* 3&'$!%!&'#*" %& 3&''#3% '!%

&' !% 3&&!' 3//3!% %& 10 B%@&*. D "!%38 & /*&*!/%# */%!'

!% #> &%#% :&'%#$ /$2/3#'% %& %# '!% "/ # *&!$#$ &* 3&'%*& & &%#* *&&: /!*

3&'$!%!&'!' '!%".

E/3 *&&: /!* 3&'$!%!&'!' '!% "/ # 3&''#3%#$ %& / !'/ " 3!*3!%8 *&: %#

D!"%*!%!&' &/*$.

A :/>!:: & %& /!* 3&'$!%!&'!' '!%" /*# #*:!%%#$ %& 3&''#3% &' / "!'#/"# ".

W#*# %*## &* :&*# '!%" /*# !'"%/#$ %# "&$ # //'3#$ /" '#/* /" &""!# * /

T*## /"# ".

4.6.7 E- L &+-%*/ & &%/# "/#% //*/%" "3 /" ##3%*!3 3##$!' 5 ,8 RMS %& #/*%8 :#/"*#$ &' ' 3!*3!% /'$ "/ 3&: !% BS 559.

H.,. $!"3/*# !%!' #;!:#'%8 !'3$!' '#&' "!'" &* /$#*%!"!' &* /' &%#* *&"#

"/ '&% # !'"%/#$ !%&% *!&* /*&/ & DEWA.

17


23/61

4.6.9 S*- A/; E>*


24/61

T# "%/*%!' #;!:#'% %& !:!% %# 3**#'% :/ 3&'"!"% & /' & %# &&!' %# &* &%#*

/*$ DEWA.

/) S%/* D#%/

) P*!:/* R#"!"%/'3#

3) A%& T*/'"&*:#*

A :&%&*" "/ # *&!$#$ !% /' !"&/%&*8 &* !"&/%!' %# :&%&* *&: %# " $*!'

#*!&$" & !'"#3%!&' /'$ :/!'%#'/'3#. S3 :#/'" & !"&/%!&' "/ ##3%!# !'%#**% %#

" &' / /"#". T# !"&/%&* :/ # !'%#*/ !% %# 3&'%*& #/* &* "#/*/%#8 % "/

# !' 3&"# *&>!:!% %& %# :&%&*. A' #:#*#'3 "%& " %%&' "/ # !'3&*&*/%#$ !'

%# 3&'%*& #/*.

W#' :&%&* "%/*%!' #/* !" #'#*!++ P* C',?'-.

A !%!' /'$ /' 3!*3!%" "/ #'#*/ # !'"%/#$ !% :/>!:: &/$ #* 3!*3!% !%!'

6 /%%" K 3!*3!% *#/=#* */%!' 6 A (1.5:: 3!*3!% 3&'$3%&*" ) &* 1 /%% K 3!*3!%

*#/=#* */%!' 1 A( .5 ::@ 1.5 ::3!*3!% 3&'$3%&*"). A :!'!:: & 1 W "/ #

3&'"!$#*#$ &* #/3 '&*:/ !%!' /'$ /' &!'%". F&*#"3#'% /: :/ # /""#""#$ /" 1.0>

/: W.

W#*##* !%%!'" !% $!"3/*# !%8 3&:/3% &*#"3#'% /:" /*# !'"%/#$8 %# 3!*3!%

*#/=#* */%!'8 3!*3!% 3&'$3%&* "!


25/61

A */$!/ !'/ " 3!*3!% :/ # !'"%/#$ %& "#*# / :/>!:: & !# 1 A8 "!%3#$ "&3=#%

&%#%" !' *&&: &%#* %/' =!%3#' /'$ 3&'%*$ / A 3!*3!% *#/=#* !' $!"%*!%!&'

&/*$. A :/>!:: & 1 "&3=#% &%#%" !' *&&: &%#* %/' =!%3#' :/ # 3&''#3%#$ %& /

*!' 3!*3!%8 3&'%*$ / A 3!*3!% *#/=#*.

A 3**#'% $#:/'$ & 1 A "/ # /"":#$ &* #/3 1 A "&3=#% &%#% 3!*3!%. A :!'!::

& W #* &!'% :/ # 3&'"!$#*#$ &* #/3 1 A "!%3#$ &%#%8 !'"%/#$ &* #'#*/

%!!% *&"#8 &%#* %/' !' =!%3#'. A %!' "&3=#% &%#% "/ # 3&'"!$#*#$ /" %&

"#/*/%# "&3=#% &%#% &!'%". A =!%3#' /*#/ :/ '##$ "#/*/%# 3!*3!%".

A 3**#'% $#:/'$ & 15 A "/ # /"":#$ &* #/3 15 A "!%3#$ "&3=#% &%#% 3!*3!%.

H#*8 &* #'#*/ *&"# %!!% "&3=#% &%#%" /' /"":#$ &/$ & 1W #* "&3=#%

&%#% !'"%/#$ !' 3&::#*3!/ /'$ !'$"%*!/ *#:!"#" /'$ 5 W #* "&3=#% &%#% !' *#"!

$#'%!/ *#:!"#" :/ # #*:!%%#$.

F&* "%/%!&'/* /!/'3# /'$ #;!:#'% !'3$!' /!* 3&'$!%!&'#*"8 %# /3%/ &/$ & #/3

/!/'3# /'$ #;!:#'% "/ # 3&'"!$#*#$ /" 3&''#3%#$ &/$.

C**#'% $#:/'$ & &!'% "3 /" ##3%*!3 3&3= /'$ &%#* 3**#'% "!' #;!:#'% & */%!'

'&% *#/%#* %/' 5 ,A :/ # '##3%#$.

F&* :%! 3&'":#* !'"%//%!&'8 !3 !'3$#" 3&::#*3!/ %# & *#:!"#" "3 /" "&"

"&*&&:"8 /*/#"8 &*="&"8 #%3. #*# *&!"!&' &* 3&''#3%!&' & /$$!%!&'/ &/$ :/

# *#;!*#$8 %# /"":#$ 3&''#3%#$ &/$ & #/3 "/*# @"/3#@3!*3!% "/ /"& # !'$!3/%#$ !'

%# &/$ $!"%*!%!&' "3#$#" ":!%%#$ &* DEWA?/ /*&/.

4.7.2 M'>?> D*>/;

A $!"%*!%!&' &/*$" "/ # */%#$ &* %&%/ 3&''#3%#$ &/$" #&*# / $!#*"!% /3%&* !"

/!#$.T# $#:/'$ &/$ & #/3 !'/ " 3!*3!% !" $#%#*:!'#$ /$$!' %# /3%/ &* /"":#$

&/$ & !'$!!$/ &!'%"@/!/'3#" @#;!:#'%8 !3##* !" !#*. A' /&/'3# &*

$!#*"!% :/ # #*:!%%#$ #*# /*&*!/%#.

T# $#%/!" & &/$ $!"%*!%!&' "3#$#" "/ # ":!%%#$ %& DEWA?" /*&/ !' %#

&*:/% !#' !' /#'$!> 88 K4. T# %&%/ 3&''#3%#$ &/$ & !'$!!$/ ##"@ 3!*3!%" "/

# $#%#*:!'#$ /" *#3&::#'$#$ !' *#/%!&' 4.7.1. A' /*&*!/%# $!#*"!% /3%&*8 &*=#$

&% "!%/ ;/!!#$ #'!'##*8 "/ # #*:!%%#$ %& $#%#*:!'# %# :/>!:: $#:/'$ /%

%# :/!' &* " :/!' $!"%*!%!&' ##.

T# !:!% & :/>!:: $#:/'$ !' W #*:!%%#$ /% M/!' D!"%*!%!&' B&/*$ 3&''#3%#$ %&

DEWA " ##$#* @%*/'"&*:#* !" '&%#$ #& &* !$/'3#./) 4 A: F##$#* W

) 15 ,A %*/'"&*:#* 1 W

3) 1 ,A %*/'"&*:#* 0 W

$) 5 ,A %*/'"&*:#* 4 W

%# *&/$ *&%#3%!# $#!3#@!'3&:#* 3!*3!% *#/=#* !' MDB "/ # "!%/ "#% /%

3&**#"&'$!' $#"!' 3**#'%.

S!'3# :/>. $#:/'$ 3/' /* &' #/3 %# & *&2#3% "3 /" *#"!$#'%!/8 3&::#*3!/8

!'$"%*!/8 #%3.&%#* :#%&$

"#$ !'"%//%!&' $#"!'#* !% "!%/# $#*## & ='$# /'$ #>#*!#'3# & $!#*"!%

/!3/%!&' %& / /*%!3/* !'"%//%!&'8 !" #*:!%%#$. H#*8 %# $#"!' :#%&$ /'$ %#

*&&"#$ $!#*"!% "/ # 3#/* !'$!3/%#$ !' %# $#"!' $*/!'" /'$ &/$ "3#$#"":!%%#$ &* DEWA?" /*&/.

20


26/61

SECTION)5

EART#ING AND EART# LEA$AGE PROTECTION

5.1 CONSUMERS EART#ING SSTEM

5.1.1 E#* 3&'":#* !'"%//%!&' "/ # *&!$#$ !% "#/*/%# #/*%!' ""%#:8 !'"%/#$ /'$

:/!'%/!'#$ %# 3&'":#*.

5.1.2 E/3 3&'":#*?" #/*%!' ""%#: "/ 3&:*!"# & QE/*% ##3%*&$#@" :/!' #/*% #/$

3&''#3%#$ #%##' %# QE/*% ##3%*&$#@" Q /'$ %# 3&'":#*?" :/!' #/*%!' %#*:!'/@" &*

/*8 E/*% 3&'%!'!% 3&'$3%&*" (ECC") & ##* &%&!' 3!*3!% *&: %# :/!'8 ":/!' K

!'/ $!"%*!%!&' &/*$"8 #;!&%#'%!/ &'$!' & / :#%/ &*= K #>&"#$ 3&'$3%!# /*%"

/'$ #'3&"*#"8 #%3.

5.1.3 T# 3&'":#*?" #/*%!' ""%#: "/ # 3&''#3%#$ %& DEWA?" #/*%!' ""%#: (!'3&:!'

" 3/# /*:&*@ E/*% 3&'%!'!% 3&'$3%&*8 /" /*$ DEWA.

5.2 CONSUMERS MAIN EART# ELECTRODE

5.2.1 I' #'#*/8 :!'!:: &'# M/!' E/*% ##3%*&$# "/ # *&!$#$ &* #/3 !'3&:!' &!'% &

S @ 3&'":#*?" M/!' D!"%*!%!&' B&/*$8 !%!' %# 3&'":#*?" *#:!"#".

5.2.2 T# QE/*% E#3%*&$#? "/ '&*:/ 3&:*!"# & ::@16:: $!/:#%#* 3*@"%## 3&*#

&'$#$ #/*% *&$ "#% !% $*!!' !' /'$ #/$ $*!#' %& / :!'!:: $#% & :#%#*".

T# #/*% ##3%*&$# "/ # !'"%/#$ !'"!$# / ::>::>:: #/*% !% !%

!'"#3%!&' 3*. T# 3&''#3%!&' %& %# #/*% ##3%*&$#8 !%!' %# !'"#3%!&' !%8 "/ #

"&'$ :/$# %*& / 3&**&"!&' *#"!"%/'% %#*:!'/ 3

5.2.3 T# 3&'":#*?" QM/!' E/*% E#3%*&$#? "/ # !'"%/#$ /" 3&"# %& %# :/!' $!"%*!%!&'&/*$ /" &""!#. W#*##*8 :&*# %/' &'# QE/*% E#3%*&$#? !" !'"%/#$8 !%!' %#

3&'":#* *#:!"#"8 %#"# "/ # "/3#$ /% :!'!:: 6 :#%#*" //*%.

5.2.4 T# :/!' E/*% E#3%*&$# *#"!"%/'3# "/ '&% #>3##$ 1 8 &* #/3 !'3&:!' DEWA

"@MDB

T# *#"!"%/'3# *&: /' &!'% & %# 3&'%!'!% 3&'$3%&* %& %# :/!' E/*% ##3%*&$# "/

'&% #>3##$ .5 .

T# 3&'":#*?" #/*% *#"!"%/'3# /'$ 3&'%!'!% & ECC" "/ # #*!&$!3/ 3#3=#$ /'$

:/!'%/!'#$ /" / %& #'"*# 3&'":#* "/#%.

5.3 EART# CONTINUIT CONDUCTOR ECC

5.3.1 E#* 3!*3!% !' %# M/!'8 S M/!' /'$ F!'/ $!"%*!%!&' &/*$ "/ # *&!$#$ !% /

"#/*/%#8 *##' /'$ #& (G@Y)8 P,C !'"/%#$ 3* QECC?. T# :!'!:: 3*&""

"#3%!&'/ /*#/ & %# ECC "/ # "##3%#$ /" "#3!!#$ !' A#'$!>1.

5.3.2 T# ECC " "/ # %#*:!'/%#$ /% ##3%*!3/ #;!:#'%8 //*/%" /'$ $!"%*!%!&' "!%3#/*8

!% !%%!'"8 :&'%!' &>#" & "!%3#" /'$ "&3=#%"&%#%"8 #%3.!% %!''#$ 3* "8 /"

/!3/#8 /% &% #'$" &' *&"# :/$# #/*% %#*:!'/".

21


27/61

5.3.3 A " /* *!"#*" !'"%/#$ &* ##3%*!3/ $!"%*!%!&' !' ! *!"# !$!'" /'$ &%#* 3&'":#*

!'"%//%!&' "/ !'3&*&*/%# /' /$#;/%# "!&"#$ :#%/ &*=" & 3&'":#*?" /!/'3#"8 //*/%"8 #;!:#'%8 :/3!'#"8 !$!'

"%*3%*#" /'$ %# !=# !% :#%/!3 #'3&"*# /'$ /*%"8 :#%/ /%#* !#"8 #%3. "/ #

*&!$#$ !% #;!&%#'%!/ &'$!' 3&'$3%&*".

5.5.2 T# 3*&"""#3%!&'/ /*#/ & #;!&%#'%!/ &'$!' 3&'$3%&*" "/ # "##3%#$ /" "#3!!#$ !'

A#'$!>1.

5.5.3 T# #;!&%#'%!/ &'$!' 3&'$3%&*" "/ # 3&''#3%#$ %& %# :/!' #/*%!' %#*:!'/ !%!'

%# 3&'":#*?" !*!' !'"%//%!&'" /'$ %# 3&'%!'!% "/ # %#"%#$ /'$ :/!'%/!'#$ %#

3&'":#*.

22


28/61


29/61

S!%/# #>/'"!&' 3*" "/ # *&!$#$ !' / %*'=!' /'$ 3&'$!% *'" /% %# #>/'"!&' 2&!'%"

!' %# !$!' "%*3%*# /'$ *#/* !'%#*/" !' / *'" #>3##$!' 7 :#%#*" !' #'% &* /"

*#3&::#'$#$ %# :/'/3%*#*.

S!%/# *&"# :/$# &>#" !% /$/%#*"8 3#!!' *&"#" #%3."/ # *&!$#$ /% / !'$!!$/ &%#%

&!'%" & %# !*!' !'"%//%!&'".

L!% !%%!'" "#$ !% T'"%#' !/:#'% /'$ /' /:" "/ # "!%/ "#*#/%#$ /'$

"&*%#$ *&: %# P,C 3&'$!% /'$ %#*:!'/ &%#% &>#" %& *##'% $#%#*!&*/%!&' $# %& /""&3!/%#$

! %#:#*/%*# *!"#.

T# 3&'$!% *'"8 !3 /*# 3&'3#/#$ !%!' %# !$!' "%*3%*# "3 /" !' &&*8 /8 *&&8

3&:' #%3. "/ # *&!$#$ !% / :!'!:: "3*##$ 3* & 1::.

W#' %# %*'=!' /'$ 3&'$!% *'" /*# !'"%/#$ !% 3/"#" !' %# !$!' "%*3%*#8 %# "/ #

!*: !>#$ /% *#/* !'%#*/" !% *&"# :/$# 3*!:#%" /'$@&* "/$$#".

T# "%/'$/*$ 3&'$!% &>#"8 $*/!' &>#" #%3. "/ # !'"%/#$ !% !%" 3*@!$ " !% %#

&%#* !'!" & %# !$!' "%*3%*#.

O' " %# "!%3#"8 "&3=#% &%#%" /'$ /33#""&*!#" "/ # "#$ &* 3&'3#/#$ !*!'.

I' "*/3# :&'%#$ !'$"%*!/ !'"%//%!&'" /'$ #*# "!%/%!&'" "2#3% %& !*# *!"=8 &' //'!


30/61

C/#" "/ # /"%#'#$ "#3*# *&"# :/$# 3!"8 3#/%" &* "/$$#" /% "/3!' /"

*#3&::#'$#$ !' A#'$!>14. C/# %!#" "/ '&% # "#$ %& "&*% :%! 3&*# 3/#" !'"%/#$ &'

3/# %*/" !%%#$ #*%!3/.

C/# %*/" "/ '&% # "#$ !' &3/%!&'" #*# %# ! # "2#3%#$ %& "##*# "!3/ $/:/#.

S!3!#'% "/3# "/ # *&!$#$ /'$ :/!'%/!'#$ /*&'$ 3/# %*/ %& #*:!% /$#;/%# /33#"" &*

!'"%/!' /'$ :/!'%/!'!' %# 3/#".

25

SECTION)7

INSTALLATION CA!LES" EQUIPMENT" ACCESSORIES AND WIRINGSSTEMS

7.1 ARMOURED CA!LES


31/61

7.1.1 A*:&*#$ 3/#" :/ # !'"%/#$ #!%#* $!*#3% *!#$ !' *&'$8 $*/' %*& $3%"8 /!$!' 3&'3*#%# %*#'3#"8 3#/%#$ %& /8 &* :&'%#$ &' 3/# %*/".

7.1.2 T# 3**#'% 3/**!' 3//3!% & %# 3/#@" "/ # $#%#*:!'#$ &' /%#* /!' "!%/#3&**#3%!&' /3%&*" /"#$ &' %# !'"%//%!&' :#%&$ & %# 3/#@".

7.1.3 O' /*:&*#$ 3/#" "/ # "#$ &* '$#**&'$ !'"%//%!&'".

7.1.4 T# /*:&*#$ 3/#"8 &* '$#**&'$ !'"%//%!&' "/ '&*:/ # /!$ /% 9 3: #& %#*&'$ ## /'$ *&!$#$ !% / /#* & /% #/"% 15 3: !:#*!&" "&! /*&'$. W#*#

*&%#3%!# 3*" /*# *#;!*#$8 %# "/ # 3/*# 3#'%#*#$ * %# 3/#"8 %*&&% %#

#'%. T# 3*" "/ # & /$#;/%# !$% %& *&%#3% %# 3/#"8 !% / :!'!:: */

&' #/3 "!$# & 5:: 3&&*#$ P,C /*'!' %/#" "/ # /!$ /%#* !!' / %# 3/#8

%& 3: #& %# *&'$ ##.

7.1.5 C/#" :/ # !'"%/#$ &' 3/# %*/" /% "#3!!3 &3/%!&'" /'$ /" *#3&::#'$#$ !' 3/"# 6.& %# R#/%!&'.

7.1.6 M!'!:: !'%#*'/ */$!" & #'$ &* 3/# !' !>#$ !*!' !'"%//%!&' "/ '&% # #"" %/' 0%!:#" %# */ $!/:#%#* & %# 3/#.

7.1.7 N& 2&!'%" "/ # #*:!%%#$ &' /' 3/# *'" !' 3&'":#*?" !>#$ !*!' !'"%//%!&'.

7.1.8 W#*# 3/#" &* !*!' ""%#: /""#" %*& &&*8 /8 /*%!%!&'" &* 3#!!'8 %# '!'"*#:/!'!' /%#* /""/# & %# !*!' ""%#:" "/ # "#/#$ %& %# $#*## & !*# *#"!"%/'3#

*#;!*#$.

7.1.9 C/# /'$" "#$ &* /*:&*#$ 3/#" "/ # & */"" 3&:*#""!&' %#8 3&:!' !% BS6118 !% #/*% %/ /'$ P,C "*&$.

7.1.10 A %#*:!'/%!&'" & 3/# 3&'$3%&*" "/ # :#3/'!3/ /'$ ##3%*!3/ "&'$. E#*%#*:!'/%!&' "/ # :/$# :#/'" & / %#*:!'/ &* 3&:*#""!&' %# "&3=#% @8 %& %#

/*&/ & %# DEWA8 /'$ "/ '&% !:&"# /' :#3/'!3/ "%*/!' &' %# %#*:!'/ &*

"&3=#%@.

7.1.11 S#/*/%# E/*% C&'%!'!% C&'$3%&*" (ECC") "/ # !'"%/#$ /'$ %#*:!'/%#$ &* #/3##$#*@ 3!*3!%8 /" "#3!!#$ !' "#3%!&'5& %# *#/%!&'".

26

7.2 DISTRI!UTION !OARDS

7.2.1 A $!"%*!%!&' &/*$" #!%#* :/!'.8 " :/!' &* !'/ DB" "/ # !'"%/#$ !' &3/%!&'" %&!3 /33#"" !" //!/# /% / %!:#" &* */%!&'8 %#"%!'8 !'"#3%!&'8 :/!'%#'/'3# /'$

*#/!*.


32/61

7.2.2 M/!'8 " :/!' &* !'/ $!"%*!%!&' &/*$" "/ '&% # !'"%/#$ !%!' /% *&&:"8 %&!#%"8$/: &* #% &3/%!&'"8 #$ *&&:"8 =!%3#'"8 / "!'="8 "%&*# *&&:"8 ! /:!#'% *&&:"8

$/'#*&" &* /


33/61

A !*!' /'$ /33#""&*!#" "/ # "##3%#$ /'$ !'"%/#$ %& "!% !'$!!$/ &3/%!&'" /'$

3&:!' !% *##/'% *#/%!&'" "#3!!#$ !' "#3%!&'48 !' /$$!%!&' %& %# &&!'

*#;!*#:#'%".

C!*3!%" *&: $!#*#'% $!"%*!%!&' &/*$" "/ '&% # !'"%/#$ !' / 3&::&' 3&'$!% &*

%*'=!'.

T# 3!*3!% !*#" & $!#*#'% &%/# */$#" "/ # "#*#/%#$ !% /**!#*" !' %*'=!' *'"

&* !'"%/#$ !' "#/*/%# 3&'$!%".

T# 3!*3!% !*#" & !'$!!$/ 3/%#&*!#" "3 /" !%!'8 *8 #:#*#'38 #%3. "/ #

"#*#/%#$ !% /**!#*" !' %*'=!' *'" &* !'"%/#$ !' "#/*/%#$ 3&'$!%".

W#*# / *#"!$#'%!/ *#:!"#" !" "!#$ !% / /"# "8 /" /* /" &""!#8 %# !%

!%%!'"8 "&3=#% &%#%"8 /%#* #/%#*"8 3&&=#*" /'$ &%#* "!'# /"# //*/%" !'"%/#$

!%!' /' *&&: "/ '&% # 3&''#3%#$ %& :&*# %/' &'# /"#. W#*##* :&*# %/' &'#

/"# 3/''&% # /&!$#$8 / :!'!:: $!"%/'3# & :#%#*" "/ # :/!'%/!'#$ #%##' /'

&%#%8 /33#""&* &* /!/'3# 3&''#3%#$ %& $!#*#'% /"#" & %# ".

W#*# "!%3 &> 3&'%/!'" :&*# %/' &'# /"#8 &* *& "!%3!'8 /*$ "!%3 &>

!% /"# /**!#*" "/ # "#$ /'$ /##$ %& !'$!3/%# %# 0 &%" #>!"% /% / &>. A

3!*3!% !*#" "/ # 3&&* !$#'%!!#$ /" "#3!!#$ !' R#/%!&' 4..4.

W#*# / !*!' ""%#: !" &3/%#$ !' 3&"# *&>!:!% %& '&' ##3%*!3/ "#*!3#8 %# !*!'

""%#: "&$ # /$#;/%# "#*#/%#$ /'$ *&%#3%#$ //!'"% /


34/61

/'$ *&"# & #/3 !%#: &* 3!*3!%. I'"%*3%!&'" &* 3/%!&' '&%!3#" &* 3&**#3% */%!&' "/

/"& # *&!$#$8 #*##* %#*# !" / &""!!!% & 3&'"!&'.

A /#" :"% # !' &% E'!" /'$ A*/!3 /'$ & #%%#* "!


35/61

8.1.9 T# 3//3!%&*" "/ # "!%/# &* */%!&' '$#* /*:&'!3 3**#'% 3&'$!%!&'".

8.1.10 T# 3&'%/3%&*" "#$ !' %# 3//3!%&* /'= "/ # /# %& !%"%/'$ "!%3!' "*#". M#/'"

"/ # !'"%/#$ %& !"&/%# #/3 3//3!%&*8 3//3!%&* /'=8 &* 3//3!%&* !'"%//%!&' *&: /

"&*3#" & &%/# /'$ %& *#: *&: "#*!3# /" '!%.

8.1.11 A '&'3**#'% 3/**!' :#%/ /*%" & 3//3!%&* "/ # #/*%#$ /" "#3!!#$ !' 3/"# 5.58

"#3%!&' 5.

8.1.12 E/3 3//3!%&* "/ # *&!$#$ !% / '/:# /%# !'$!3/%!' */%#$ &%/#8 *#;#'3 /*8

':#* & /"#"8 $#%/!" & !;!$ !#$ (! /')8 $!"3/*# $#!3# /'$ '/:# & %#

:/'/3%*#*.

8.1.13 T# 3&'%*& /'$ *&%#3%!&' $#!3# *&!$#$ !' %# 3//3!%&* /'= "/ # 3#3=#$ /'$

:/!'%/!'#$ *#/*.

8.1.14 W#*##* 3//3!%&* /'=@/'# !" !'"%/#$ &' %# " "!$# & /' DEWA?" WH

:#%#*!'8 /$#;/%# "#/!' *&!"!&' "/ # :/$# /" "#3!!#$ !' *#/%!&' ..11

8.2 UNDER&OLTAGE U& RELAS WIT# AUTO RESERT TIMER

8.2.1 A /!* 3&'$!%!&'#*" &* /!* 3&'$!%!&'!' '!%" @/'%"@ #;!:#'% !'"%/#$ !%!' %#

3&'":#*?" !'"%//%!&' "/ # *&!$#$ !% '$#* &%/# *#/"( U.,.). !% !>#$ &%/#

3%& "#%%!' /% 75 & %# '&:!'/ " &%/#8 !%!' .1 "#3&'$"8 /'$ /%& *#"#% %!:#*

!% /$2"%/# %!:# "#%%!' #%##' 5 /'$ 1 :!'%#".

8.2.2 T# /%& *#"#% %!:#* & %# U., *#/" "/ # "#% /% /#" "#3!!#$ !' %# "3#$#"8

/*$ DEWA8 %& "!% !'$!!$/ !'"%//%!&'. N#3#""/* *&!"!&' &* "#/!' :/ #

!'3&*&*/%#$ !' %# *#/ %& *#"%*!3% /33#"" &* /$2"%:#'%" & "#%%!'".

8.2.3 T# U., *#/" !% /%& *#"#% %!:#* "/ '&*:/ # !'3&*&*/%#$ !%!' %# *#"#3%!# /!*

3&'$!%!&'!' '!% @#;!:#'% &* !' %#!* 3&'%*& /'#". F&* ":/ /!* 3&'$!%!&'#*"8 *&!"!&'

& U., *#/" !% /%& *#"#% %!:#* !%!' %# 3&'":#*?" $!"%*!%!&' &/*$ "/ #

#*:!%%#$ &*8 !'$!!$/ &* *& & '!%". P*!&* /*&/ "/ # &%/!'#$ *&: DEWA &'

##* "3 /!3/%!&'.

8.2.4 T# U., *#/" !% /""&3!/%#$ 3&'%*& "/ # 3#3=#$ /'$ :/!'%/!'#$ *#/*.

30

SECTION)9CONSTRUCTION SITE INSTALLATION


36/61

9.1 GENERAL

9.1.1 A!3/%!&' &* %#:&*/* * " "/ # ":!%%#$ %& DEWA /% #/"% &'# :&'% !'

/$/'3# & %# * *#;!*#:#'%.

9.1. T#:&*/* * " "/ # #*:!%%#$ &* 3&'"%*3%!&' *&"#" "2#3% %& %#*:"8

3&'$!%!&'"8 ##"8 %/*!" /'$ !'"%*3%!&'" !""#$ DEWA *&: %!:# %& %!:#.

9.1. T# 3&'":#* "/ 3&: !% %# "/#% *#;!*#:#'%" "#3!!#$ &* #*:/'#'% !'"%//%!&'8

!' /$$!%!&' %& %# "#3!!3 *#;!*#:#'%" &' !'"%//%!&' /% 3&'"%*3%!&' "!%#" *#3&::#'$#$ !'

%!" "#3%!&' & %# *#/%!&'".

9.1.4 E#* /""#: &* %# $!"%*!%!&' & ##3%*!3!% &' 3&'"%*3%!&' "!%#" "/ 3&: !% %#

*#;!*#:#'%" & BS EN 6494.

9.2 WIRING SSTEMS AND DISTRI!UTION !OARDS

9.2.1 E#* !*!' ""%#: "/ # "& /**/'#$ %/% '& "%*/!' !" /3#$ &' %# %#*:!'/%!&'" &

3&'$3%&*" '#"" "3 %#*:!'/%!&'" /*# $#"!'#$ &* %!" *&"#.

9.2.2 N& 3/# "/ *' /3*&"" / "!%# *&/$ &* / /=/ '#"" /$#;/%# *&%#3%!&' & %# 3/#

//!'"% :#3/'!3/ $/:/# !" *&!$#$.

9.2.3 A 3/#" "#$ &' 3&'"%*3%!&' "!%#" "/ /# / :#%/ "#/% /'$ @&* /*:&*8 !3 "/ #

##3%!# #/*%#$ /'$ 3&'%!'&". F#>!# 3&*$" &* "# /% %# "!%# "/ 3&: !% BS

6141.

9.2.4 T# :#%#*!' 3/!'#%8 $!"%*!%!&' &/*$@" &* /' !*!' !'"%//%!&'"8 !'"%/#$ &%$&&*8 "/

# & #/%#* *&& %#.

9.2.5 M#/'" & #:#*#'3 "!%3!' "/ # *&!$#$ &' %# " %& / #;!:#'% *&: !3

!% :/ # '#3#""/* %& $!"3&''#3% / !# 3&'$3%&*" !' &*$#* %& *#: / /


37/61

APPENDI( PAGE

1) R##*#'3# "%/'$/*$" 34

2) D#%/!" & 3&''#3%#$ &/$@M/>. D#:/'$(&*:/% 35

3)L&/$ $!"%*!%!&' "3#$# /"#(&*:/%) 36

4) L&/$ $!"%*!%!&' "3#$#1 /"#(&*:/%) 37

5) E#3%*!3/ ":&". 38

6) C&'%*/3%&*?" !'"#3%!&' 3#*%!!3/%# (&*:/%)

7) A T!3/ /**/'#:#'% & :#%#*!' 3/!'#% &' 3&:&'$ 43

W/

! T!3/ /**/'#:#'% & WH :#%#* !' E#3%*!3/ "#*!3# *&&:. 44

C T!3/ E#3%*!3/ "#*!3# *&&: !% 1 N& MDB 45

DT!3/ E#3%*!3/ "#*!3# *&&: !% 1 N&

3!3/ %# L., "!%3&/*$@/'# 46

8 S*+*,-'/ ,+*

T+*)1 S!'# 3&*# P,C !'"/%#$ '&'/*:&*#$

"%/'$/*$ 3* 3&'$3%&*". 47

T+*)2 M%!3&*# /*:&*#$ P,C !'"/%#$8 3*

3&'$3%&*". 48

T+*)3 M%!3&*# /*:&*#$ XLPE !'"/%#$


38/61

3* 3&'$3%&*". 49

9) C&&* !$#'%!!3/%!&' & ' /*:&*#$ 8 /*:&*#$ /'$

#>!# 3/# 3&*#" /'$ /*# 3&'$3%&*". 50

10 S#3!!3/%!&' & MDB"@SMDB" (F&*:/%) 51)53

11 S#3!!3/%!&' & DB"(&*:/%) 54)56

12 E/*% 3&'%!'!% 3&'$3%&*(ECC) /'$ #;!&%#'%!/

&'$!' 3&'$3%&*". 57

13 E/*% #/=/# *&%#3%!&'. 58

14 S/3!' & "&*%" &* T*'=!'8 3&'$!%" /'$ 3/#" 59

32

APPENDI(

PAGE

15 N:#* & 3/#" %/% :/ # !'"%/#$ !' %*'=!'8

3&'$!%" /'$ 3/# %*/".

60

16 D/%/ "3#$# &* L., ##3%*!3!% :#%#*" /'$ 3**#'%

%*/'"&*:#*.

61


39/61

33

APPENDI()1

REFRENCE STANDARDSA #;!:#'%8 //*/%"8 :/%#*!/" /'$ /33#""&*!#" 3&:!' !% *##/'% *#3&::#'$/%!&'" !'

%# &&!' "%/'$/*$"@ $&3:#'%" "/ # $##:#$ %& "/%!" %# *#;!*#:#'%" & %#"#

*#/%!&'"8 '#"" &%#*!"# "#3!!#$ (3/"# 1.68 "#3%!&'1).SUBVECT BS IEC


40/61

C+*

P,C !'"/%!&' (&* * K !%!'.)

P,C !'"/%!&' (&* " @ #/* /'$ 3&'%*&

!*!'.)

T#*:& "#%%!' !'"/%!&'.

M!'#*/ !'"/%!&'.

F#>!# 3/#" K 3&*$"

C/# /'$".

C/;?'- /; ,/;?'- '--'/!# "%##

D*+'* ,/-?,-'/ '-*

E-='/


41/61

N/ ,>?-''+'- -*-

T?/B'/


42/61

D!"%*!%!&' B&/*$ (DB)

A!* 3!*3!% B*#/=#* (ACB)

M&$#$ C/"# C!*3!% B*#/=#* (MCCB)

M!'!/%*# 3!*3!% B*#/=#* (MCB)

E/*% L#/=/# C!*3!% B*#/=#* (ELCB)

F"#

L!'=WH M#%#* ($!*#3% *#/$!' %#)

WH M#%#* (C.T */%#$ %#)

S!%3 L!'# (%& 3&''#3% / &%#%" 3&'%*$ &'# "!%3)

C!*3!% L!'# (%& 3&''#3% / &%#%" &' %# "/:# 3!*3!%)

S=!*%!' T*'=!'

U'$#* &&* T*'=!'

1 A S!%3 S&3=#% &%#%

15 A "!%3 "&3=#% &%#%

A D P S!%3 W!% N#&' I'$!3/%&* A D P S!%3

A D P S!%3

38

SM!OLS DESCRIPTION

S/#* "&3=#% &%#% %& BS 5

C&:!'#$ :!**&* !% !% !'%#*/ "/#* "&3=#% &%#% %& BS 5

45A C&&=#* 3&'%*& '!%

T'"%#' !% !%%!' 3#!!' :&'%#$

(!%%!' *##*#'3# #%%#* "/ # "&' !' 3!*3# $#%/!#$ !' ##'$8 %& !# &/$

*/%!' & !% !%%!' /'$ ':#* & /:")

F&*#"3#'% !% !%%!' 3#!!' :&'%#$.

(!%%!' *##*#'3# #%%#* "/ # "&' !' 3!*3# $#%/!#$ !' ##'$8 %& !# &/$

*/%!' & !% !%%!' /'$ ':#* & /:" )

L!%!' S!%3 1 W/

L!%!' S!%3 W/

L!%!' S!%3 !'%#*:#$!/%# /

L!%!' S!%3 P 3&*$ %#

L!%!' S!%3 # O#*/%#$

L!%!' S!%3 W#/%#* *&& %#

C&3= O%#% &!'%

E>/"% /'

C#!!' :&'%#$ /'

C#!!' /' *#/%&*

L& ## 3&&=#* &%#% 3&''#3%!&' '!%E/*% 3&''#3%!&'

T!:# S!%3

P&%& E#3%*!3 3#


43/61

B# P"

B# ( '&% /""&3!/%#$ !% F!*# A/*:)

39

APPNDIX 6 (3/"# 1.11 "#3%!&'1)

CONTRATORS INSPECTION CERTIFACTE

I@ # 3#*%! %# E#3%*!3/ !'"%//%!&' /%

PH*,-: '++ ?'+;'/* :

A+',-'/ N. :. A, N..

A,,?/- N. S :..

D'/< + R***/,* : #CS 9 D-*; :

C//*,-*; +; :..$W M. D*>/; : ..$W

/# ##' 3&:#%#$8 !'"#3%#$ /'$ %#"%#$ !' /33&*$/'3# !% %# DEWA @IEE !*!' *#/%!&'"

(/%#"% #$!%!&') /'$ %/% %# *#"% " /*# /" !'$!3/%#$ #&

ITEMS INSPECTED OR TESTED :

1. T# & L., $!"%*!%!&' ""%#: 1/"# /'$ @&* /"#

.1 O#* 3**#'% *&%#3%!&' !" *&!$#$

M/!' 3!*3!%" !' MDB@" MCCB@F"#@

S 3!*3!%" !' SMDB@" MCCB@F"#@MCB

F!'/ 3!*3!%" !' DB@" MCB@F"#

. E/*% #/=/# !" *&!$#$ @.:A ELCB &* 1 A "&3=#% &%#% K YES@NO

/%#* #/%#*@3!*3!%"

@1 @ :A ELCB @ &* A@C YES@NO

E;!:#'% @P:"@M/3!'#" @

1 @ @ .:A ELCB @..&* A@C YES@NO

E;!:#'% @P:" @M/3!'#" @

. E/*% #/=/# $#%#3%!&' !" *&!$#$

@1 :A ELS @ELR !% /$!& @!"/ //*: &* E""#'%!/ YES@NO

"#*!3# #;!:#'% @ .


44/61

. C&'%!'!% &* #/3 #/*% 3&'%!'!% 3&'$3%&* !" "/%!"/3%&*. YES@NO

4. I'"/%!&' *#"!"%/'3# & %# !>#$ !*!' !'"%//%!&' !% 5 ..M

:##* !' M#/ O:".

5. C&'%!'!% & *!' 3!*3!% 3&'$3%&*" !" "/%!"/3%&*. YES@NO

40

6. P&/*!% %*&&% %# !'"%//%!&' !" 3&**#3% /'$ / "!'#

$#!3#" &* *&%#3%!&' /'$ "!%3!' /*# !' %# /"# YES@NO

3&'$3%&* &'.

7. P* /3%&* (P.F) 3&**#3%!&' 3//3!%&* @ /'# @" !'"%/#$ YES@NOM!'!:: P* F/3%&* & %# !'"%//%!&' !"

0.1 E/*% F/% && !:#$/'3# !" "/%!"/3%&*. YES@NO

0. M/!' E/*% E#3%*&$# *#"!"%/'3# !' O:" . ...

9. U'$#* &%/# *#/ !% /%& *#"#% %!:#* &* /!* 3&'$!%!&'#*" '!%" !%%#$ YES@NO

A%& *#"#% %!:#* "#% /% ..

1. T# */%!&' & 3**#'% */%#$ #/*% #/=/# 3!*3!% *#/=#* (") YES@NO

!" 3#3=#$ /'$ ##3%!#.

11. B/**!#*" /'$ #'3&"*#" &* *&%#3%!&' //!'"% ##3%*!3 "&3= !'

'&*:/ "#*!3# /*# "/%!"/3%&*. YES@NO

1. A #>!# 3&*$"8 "!%3#"8 "#"8 " /'$ "&3=#% &%#%" /*#

!' &&$ "#*!3#/# 3&'$!%!&' #>3#% /" '&%#$ #&8 ("#3! YES@NO

'$#* P/*/ 17).

1. T#*# !" '& "!' & *&/$!' & 3&'$3%&*" &* /33#""&*!#" YES@NO

#>3#% /" "%/%#$ #&8 ("#3! '$#* P/*/ 17)

14. A/*/%" %#"%#$ !'3$#"@ $" '&% !'3$# &*%/# /!/'3#".

15. W# /"& 3&'!*: %/% %# M/!' D!"%*!%!&' B&/*$@" (MDB") /" '&%#$ #& /*# !% %& #

#'#*!


45/61

..

E#3%*!3/ !*!' !'"%//%!&' "#*!"#$ /'$ %#"%#$ . ...

("!'/%*#)

N/:#P&"!%!&' .

C>/ : ...

P.O B&> .T#F/>...

DEWA !*#:/' 3&:#%#'3 L!3#'"# N&.

A%&*!

M. L;

C?*/- ;*>/;

A>2 1C" 1 =*

>>K

34 1C" 3 =*

>>K

1.5

.5

4

6

1

16

5

5

1.5

.5

4

6

1

16

5

5

5

7

95

1

1

15

5

4

5

6

0

1

15

15

1

15

5

4

5

6

0

1

15

15

C&::&' '&%#" &* %/# 18 K


46/61

1. A""#"" !'!%!/ $#:/'$ !% "/# $!#*"!% /'$ /'%!3!/%#$ $#:/'$ !' %*#8 ! /'8 /" /!3/#

%& !'$!!$/ 3!*3!%"8 &* "##3%!&' & 3/# "!


47/61

4 4 4

R##* %& T/# 1 &* '&%#"

48

TA!LE)3 OF APPENDI()8

M?+-' ,* >?*; (LPE '/?+-*;" ,* ,/;?,- !S 5467

S!. R/%!' &

MCB@ MCCB

(A:)

M/>. L&/$

3**#'% @ $#:/'$

(A:)

1

16

5

5

5

7

95

1

15

105

4

5

6

0

1

15

16

5

5

5

4

5

6

0

1

15

16

5

5

5

4

R** - T+* 1 /-*


48/61

49

APPENDI()9

COLOUR IDENTIFICATION OF UN) ARMOURED" ARMOURDED AND

FLE(I!LE CA!LE CORES AND !ARE CONDUCTORSR*


49/61

50

APPENDI() 10

SPECIFICATION OF MD! SMD!

(R##* %& 3/"# 4.5.1) MD!SMD! NO:

!. REFERENCE STANDARDS BS EN 649 BS 008 BS EN 64918 IEC 491 K

II. RATING OF INCOMING SUPPLY A 4 A BREAER @ ISOLATOR Z 0 A 16 A

(Z &' &/$) BREAER ISOLATOR

III CONSTRUCTION

1 M&'%!' W/ F&&* P#$#"%/

D#*## & *&%#3%!&' & %# #'3&"*# I'$&&* IP 41@4

&*!'"%//%!&' O%$&&* IP54@55

P/!'%!'@F!'!" (!'%#*'/@E>%#*'/) S% #'/:##$ E&>

P"%#* G//'!


50/61

@ "/3!' *&: !'3&:!' " %#*:!'/"@ "

A**/'#:#'% & B" B/* /'$ T/ &

3&''#3%!&'" %& &%&!' 3!*3!% *#/=#*" R!!$8 !*: "#3*#$8 "&*%#$8 $!*#3% /'$ /"

"&*% /" &""!#

A$#;/%# "! */%!' & &%&!' 3!*3!%*#/=#*"

. M!'. /% */%!' 5 A

6P*&!"!&' & :!'. &*=!' 3#/*/'3# @"/3#

&* A A 4A

I'3&:!' " 3/#" %#*:!'/%!&'"

A !'3&:#* C:" 5 5 45

0@16 A !'3&:#* C:" 75

O%&!' 3!*3!% 3/#" W!%@ !%&% 3/# &>

A$#;/%#

7P*&!"!&' & "&*% @ /3!!% &* $*#""!' C/''#" T*'=!'

3/:!' &%&!' 3/#" M/>. #!% . M (*&: F.F.L)

0O#*/%!&'/ /33#""@3&'#'!#'3# &* F*&: &%"!$# & !'#$ $&&*@

S!%3#/* B&%#$ 3*

I'3&:!' " 3!*3!% *#/=#*@!"&/%&* R#"%*!3%#$ @L&3=/#

O%&!' 3!*3!% *#/=#*

9M/!'%#'/'3# /33#""@*#/3#:#'% 3&'#'!#'3#B*#/=#* CT"

&* "!%3!' 3&:&'#'%" = M#%#* G/'$ P/%#

1P*&!"!&' &* %#*:!'/%!&' & N&' F#**&" /'$ /%#"

CU@XLPE@AWA (S.C)

&. IDENTIFICATION

1R/%!' & !'3&:!' " K &%&!' T#*:/

3!*3!% *#/=#*" D!"3*!:!'/%!&'

(,!"[!" %# */%!' "#3!!#$R##* F/% %& /*$ "!'# !'# $!/*/: N&)

T# & 3!*3!% *#/=#*"

I'3&:!' ACB MCB F@S


51/61

O%&!' MCCB F@S C@L MCCB

C&&* 3&$#" &* !'%#*'/8

M/!' 3!*3!% !*!'

P/"# R#$@ Y#&@ B#

N#%*/ B/3=

E/*% G*##' /'$ Y#&

T#*:!'/ F#**#" &* 3&'%*&@A>!!/* = :#%#* 3!*3!%". I'$!3/%!' !'"%*:#'%"

O%#*"

4P#*:/'#'% L/#"8 #'*/#$8 QT*/&!%# Q B&/*$ $#"!'/%!&' C&'%*&"

&* "!:!/* C!*3!% D#"!'/%!&' I'$!3/%!&'"

W/*'!' N&%!3#"

52

3&:%$ 5

&I) EART#ING : C&:!/'3# !% R#/%!&'

S#3%!&'5

1R/%!'@"!


52/61

1 T# T#"% A" "#3!!#$ %# 3&'"%/'%"@&'#*

3#*%!!3/%# &* *#!#@*##*#'3#

R&%!'# %#"%" /'$ 3#3=" C&:!/'3# !% "#3!!3/%!&'" ,!"/ 3#3="

S3*##$ @&%#$ 3&''#3%!&'" T!%'#""

O#*/%!&'/ 3#3=" M#3/'!3/@E#3%*!3/

$!##3%*!3 %#"% 5@15, (05)

REMAR$S.

..

..

..

..

53

APPENDI()11

SPECIFICATION OF D.! (R##* %& 3/"# 4.5.) D.! N :

I) REFERENCE STANDARDS : BS EN 6498 BS EN 69478 IEC 4918 BS 498 BS 161KBS00

II. RATING OF INCOMING SUPPL 4 A 6A 1 A !REA$ER ISOLATOR 15 A

/ +; BREAER ISOLATOR

III CONSTRUCTION

1 M&'%!' W/ P#$#"%/ S*/3# R#3#""#$

D#*## & *&%#3%!&' & %# #'3&"*# I'$&&* IP 41@4

&*!'"%//%!&' O%$&&* IP54@55

P/!'%!'@F!'!" (!'%#*'/@E>%#*'/) S% #'/:##$ E&>

P"%#* G//'!


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3#/*/'3#"@"/3!' *&: !'3&:!' " %#*:!'/"@

" K &%&!' %#*:!'/" & MCB"@FS

A**/'#:#'% & B" B/* /'$ T/ & S#*#/%#$ &* #/3 *& & MCB"@TP /"@ELCB "#3%!&'

3&''#3%!&'" %& &%&!' 3!*3!% *#/=#*" R!!$8 !*: "#3*#$8 "&*%#$8 $!*#3% /'$ /"

K '#%*/ " /*" "&*% /" &""!#

A$#;/%# "!


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C&&* 3&$#" &* !'%#*'/8 :/!'

3!*3!% !*!'

P/"# R#$@ Y#&@ B#

N#%*/ B/3=

E/*% G*##' /'$ Y#&

T#*:!'/ #**#" &* 3&'%*&@/>!!/* 3!*3!%" I'$!3/%!' !'"%*:#'%"

O%#*"

4 P#*:/'#'% /#"8 #'*/#$8 QT*/&!%# Q &* "!:!/* B&/*$ $#"!'/%!&'

C&'%*&"

C!*3!% $!/*/:

I'$!3/%!&'"

W/*'!' '&%!3#@"

ELCB@U,. R#/ "#3%!&'

55

3&'%$..P56

&I)EART#ING C&:!/'3# !% R#/%!&' "#3%!&'5

1 R/%!' @"!


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O#*/%!&'/ 3#3=" M#3/'!3/@ E#3%*!3/

D!##3%*!3 T#"% 5@15 , (05)

I() REMAR$S

..

56

APPENDI()12

EART# CONTINUIT CONDUCTORS ECC

%

EQUIPOTENTIAL !ONDING CONDUCTORS

C)*,-'/+ *

P=*/*?-+

C/;?,-

>>K

M'/'>?> ,)*,-'/+ *

ECC G P&C '/?+-*;

C* ,/;?,-

>>K

M'/'>?> ,) *,-'/+

*

*?'-*/-'+ /;'/>K

S16 SS

2/- +* -=/ 6

16 S 35 16 10

S 35

S

2

S

4

/**; /- *,**; 25

R** - *,-'/)5 *


56/61

57

APPENDI() 13

EART# LEA$AGE PROTECTION

R#3&::#'$#$ /#" & */%!' 3**#'% & ELCB@RCCB !' 3&'":#* !'"%//%!&'"

S*. N& 3!*3!% @#;!:#'%@ //*/%" R/%#$ */%!'

3**#'% (:A)

1 1 A "!%3#$ "&3=#% &%#%"

W/%#* #/%#*" @ 3&*"

R#*!#*/%&*@W/"!' :/3!'# /'$ "!:!/* //*/%"

4 D&:#"%!3 /%#* :"

5 V/3

1 W!'$&"@S!% %# /!* 3&'$!%!&'#*" 1

11 F/' 3&!@A!* H/'$!' '!%"@,A," 1

1 P/3=/# %# A@C '!%" 1@

1 C!#* 151

14 I**!/%!&' P: 1

15 E#3%*!3 3&&=#* 1

16 I'$"%*!/ :/3!'# 1@17 E#/%&*"@E"3//%&*" @5

10 N#&' S!'#"

NOTES.

1 G*&!' & 3!*3!%" '$#* &'# ELCB@RCCB !" #*:!%%#$ &* !%!' 3!*3!%"8 #'#*/

*&"# "!%3#$ "&3=#% &%#%"8 "!'# /"# #;!:#'%@ /!/'3#"8 #%3. I' "3 3/"#"

:/>!:: ':#* & 3!*3!%" *&&"#$ '$#* #/3 *& "/ # "!%/ "##3%#$

3&'"!$#*!' %# %# & *&2#3% "3 /" *#"!$#'%!/8 3&::#*3!/8 !'$"%*!/8 #%3./'$ %#

&""!# !'%#**%!&'".

W#*# ##* '!'%#**%#$ * " !" *#;!*#$ &* #;!:#'%"@ 3!*3!%" & !#*&%#3%!&'8 $*/!'/#8 #%3. "!%/# #/*% #/=/# $#%#3%!&' ""%#: !% !'$!3/%!&' /'$ @

&* //*: !" #*:!%%#$.


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F&* !'$"%*!/ !'"%//%!&'" !3 /*# $#"!'#$ !% 3&&*$!'/%#$ */%!&'/ ""%#: &

/'%" /'$ :/3!'#"8 %# #/*% #/=/# *&%#3%!&' "/ # "!%/ "##3%#$ 3&'"!$#*!'

%# "/#% /'$ */%!&'/ *#;!*#:#'%".

4 R##* %& 3/"# 5.4 &* R#/%!&'".

58

APPENDI( 14

SPACING OF SUPPORTS FOR TRUN$ING" CONDUITS AND CA!LES

R*,>>*/;*; M'>?> S,'/< O C+'" C+*-" S;;+* O S?-

(R##* %& "#3%!&' 6 &* R#/%!&'".)

1) TRUN$ING

M*-=; O I/-++-'/

S,'/< O S?- I/ C>

S-**+ R'S-**+ R'

O*++ D'. 2 C> 4 C> O*++ D'. *,**;'/< 4 ,>

#'@/-+

&*-',+

35

60

60

80


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59

APPENDI( 15

NUM!ER OF CA!LES T#AT MA !E INSTALLED IN TRUN$ING" CONDUITS" AND TRAS

(R##* %& "#3%!&' 6 & R#/%!&'")

1)TRUN$ING :

W#*# "!'# 3&*# !'"/%#$ 3/#" /*# !'"%/#$ !' "*/3# :&'%#$ :#%/ &* P,C %*'=!'8 %# "/3#

/3%&* "/ '&*:/ '&% #>3##$ 4 #*3#'%. S!%/# 3&**#3%!&' /3%&* "/ # /!#$ %& %#

3&**#"&'$!' 3**#'% 3/**!' 3//3!% 8 /"#$ &' %# ':#* & 3!*3!%" !'"%/#$ !%!' %#

%*'=!'.

2)CONDUIT :

N>'/+ , *,-'/+ *

,/;?,-

>>K

S'@* O C/;?'- I/ MM

20 25 32

M'>?> N?>* O C+* D/

1.5

.5

4.

6.

1.

16.

5.

7

5

3

))

))

))

))

12

9

6

5

3

))

))

))

12

9

8

6

4

3

T# "!


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!' / "!'# /#*. S!%/# 3&**#3%!&' /3%&* "/ # /!#$ %& %# 3&**#"&'$!' 3**#'% 3/**!'

3//3!% /"#$ !' %# ':#* & 3/#" /'$ %# :#%&$ & !'"%//%!&' (%&3!' &* "/3#$ ).

60

APPENDI( 16

DATA AND SC#EDULE FOR ELECTRICIT METERS AND CURRENT TRANSFORMERS.

(R##* %& "#3%!&' 8 &* R#/%!&'")

A) E+*,-','- M*-*.

S.N D*,'-'/ S*,'',-'/

1)

2)

3)

3.1)

3.2)

4 )

4.1)

4.2)

4.3)

T# & M#%#*"

R##*#'3# ,&%/#" /'$ *#;#'3

ACCURAC CLASS

M*-*'/< A+',-'/ S-*> R-'/

24-dewa installation regulstions1997

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