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C1200-52 IEC: 1993 1

INTERNATIONAL ELECTROTECHNICAL COMMISSION

________

ELECTRICAL INSTALLATION GUIDE -

Part 52: Selection and erection of electrical e!i"#ent -

$irin% &'&te#&

FOREWORD1FOREWORD

1) The IEC (Ine!n"#$n"% E%e&!$e&hn#&"% C$''##$n) # " $!%*#*e $!+"n#,"#$n $! "n*"!*#,"#$n

&$'.!##n+ "%% n"#$n"% e%e&!$e&hn#&"% &$''#ee (IEC N"#$n"% C$''#ee)/ The $e& $ he IEC # $

.!$'$e #ne!n"#$n"% &$$.e!"#$n $n "%% e#$n &$n&e!n#n+ "n*"!*#,"#$n #n he e%e&!#&"% "n*

e%e&!$n#& #e%*/ T$ h# en* "n* #n "**##$n $ $he! "##e he IEC .%#he Ine!n"#$n"% S"n*"!*/

The#! .!e."!"#$n # en!e* $ e&hn#&"% &$''#ee6 "n7 IEC N"#$n"% C$''#ee #ne!ee* #n he

e& *e"% #h '"7 ."! #."e #n h # .!e."!"$!7 $!8/ Ine!n" #$n"% +$4e!n'en"% "n* n$n-

+$4e!n'en"% $!+"n#,"#$n %#"##n+ #h he IEC "%$ ."!#."e #n h# .!e."!"#$n/ The IEC &$%%"$!"e

&%$e%7 #h he Ine!n"#$n"% O!+"n#,"#$n $! S"n*"!*#,"#$n (ISO) #n "&&$!*"n&e #h &$n*# #$n

*ee!'#ne* 7 "+!ee'en eeen he $ $!+"n#,"#$n/

2) The $!'"% *e#$n $! "+!ee'en $ he IEC $n e&hn#&"% '"e! .!e."!e* 7 e&hn#&"% &$''#ee $n

h#&h "%% he N"#$n"% C$''#ee h"4#n+ " .e"% #ne!e he!e#n "!e !e.!eene* e.!e " ne"!%7 "

.$#%e "n #ne!n"#$n"% &$nen $ $.#n#$n $n he e& *e"% #h/

3) The7 h"4e he $!' $ !e&$''en*"#$n $! #ne!n"#$n"% e .%#he* #n he $!' $ "n*"!* e&hn#&"%

!e.$! $! +#*e "n* he7 "!e "&&e.e* 7 he N"#$n"% C$''#ee #n h" ene/

) In $!*e! $ .!$'$e #ne!n"#$n"% n##&"#$n IEC N"#$n"% C$''#ee n*e!"8e $ "..%7 IEC Ine!n"#$n"%

S"n*"!* !"n."!en%7 $ he '"#'' een .$#%e #n he#! n"#$n"% "n* !e+#$n"% "n*"!*/ An7

*#4e!+en&e eeen he IEC S"n*"!* "n* he &$!!e.$n*#n+ n"#$n"% $! !e+#$n"% "n*"!* h"%% e &%e"!%7

#n*#&"e* #n he %"e!/

The '"#n "8 $ IEC e&hn#&"% &$''#ee # $ .!e."!e Ine!n"#$n"% S"n*"!*/ Ine&e.#$n"% !&'"n&e " e&hn#&"% &$''#ee '"7 .!$.$e he .%#&"#$n $ " e&hn#&"%!e.$! $ $ne $ he $%%$#n+ 7.e:

7.e 1 hen he !e#!e* ..$! &"nn$ e $"#ne* $! he .%#&"#$n $ "nIne!n"#$n"% S"n*"!* *e.#e !e.e"e* e$!6

7.e 2 hen he e& # #%% n*e! e&hn#&"% *e4e%$.'en $! he!e $! "n7 $he! !e"$nhe!e # he !e n$ #''e*#"e .$##%#7 $ "n "+!ee'en $n "n Ine! n"#$n"%S"n*"!*6

7.e 3 hen " e&hn#&"% &$''#ee h" &$%%e&e* *"" $ " *#e!en 8#n* !$' h" h#&h# n$!'"%%7 .%#he* " "n Ine!n"#$n"% S"n*"!* $! e"'.%e ;"e $ he "!;/

Te&hn#&"% !e.$! $ 7.e 1 "n* 2 "!e e& $ !e4#e #h#n h!ee 7e"! $ .%#&"#$n $*e*e hehe! he7 &"n e !"n$!'e* #n$ Ine!n"#$n"% S"n*"!*/ Te&hn#&"% !e.$! $7.e 3 *$ n$ ne&e"!#%7 h"4e $ e !e4#ee* n#% he *"" he7 .!$4#*e "!e &$n#*e!e* $ en$ %$n+e! 4"%#* $! e%/

IEC 1200-52 h#&h # " e&hn#&"% !e.$! $ 7.e 2 h" een .!e."!e* 7 IEC e&hn#&"%&$''#ee

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C1200-52 IEC: 1993 2

F%% #n$!'"#$n $n he 4$#n+ $! he "..!$4"% $ h# e&hn#&"% !e.$! &"n e $n* #n he!e.$! $n 4$#n+ #n*#&"e* #n he "$4e "%e/

INTROD=CTION

When *e#+n#n+ "n #n"%%"#$n $! *!#n+ #n##"% 4e!##&"#$n # # $'e#'e $e!4e* h" hee'.e!"!e !e"&he* 7 #ne!"&e eeen e!'#n"% "n* &$n*&$! "!e h#+he! h"n h$eh#&h &$%* e #h$$* 7 #n%"#$n #n n$!'"% e!4#&e/

In h# &"e .!e&"#$n h"%% e "8en $ h" he e'.e!"!e ""#ne* 7 e!'#n"% #nn$!'"% e!4#&e h"%% n$ #'."#! he eeene $ he #n%"#$n $ &$n*&$! &$nne&e* $he' $! ..$!#n+ he'/ See IEC 3

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C1200-52 IEC: 1993 3

ELECTRICAL INSTALLATION GUIDE (

Part 52: Selection and erection of electrical e!i"#ent ($irin% &'&te#&

52)* General

52)*)* Sco"e

Th# e&hn#&"% !e.$! # $! e " " +#*e $! e%e&!#&"% #n"%%"#$n/ I # "..%#&"%e $ he%#'#"#$n $ e'.e!"!e !#e $ &$nnen+ #ne!"&e/

52)*)2 Nor#ati+e reference&

The $%%$#n+ n$!'"#4e *$&'en &$n"#n .!$4##$n h#&h h!$+h !ee!en&e #n h# e&$n#e .!$4##$n $ h# ."! $ IEC 1200/ A he #'e $ .%#&"#$n he e*##$n #n*#&"e*e!e 4"%#*/ A%% n$!'"#4e *$&'en "!e e& $ !e4##$n "n* ."!#e $ "+!ee'en "e*

$n h# ."! $ IEC 1200 "!e en&$!"+e* $ #n4e#+"e he .$##%#7 $ "..%7#n+ he '$!e&en e*##$n $ he n$!'"#4e *$&'en #n*#&"e* e%$/ Me'e! $ IEC "n* ISO'"#n"#n !e+#e! $ &!!en%7 4"%#* Ine!n"#$n"% S"n*"!*/

IEC

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C1200-52 IEC: 1993

52/2/3@C$'."##%#7 eeen e'.e!"!e $ e!'#n"% $ e#.'en "n* e'.e!"!e.e!'#e* $! he #n%"#$n $ he &$n*&$! "n* &"%e h"%% e $"#ne* 7 "..!$.!#"e"!!"n+e'en *!#n+ #n"%%"#$n/

C%"e &%"e Re&$''en*"#$n

52/3 Me"n $! % #'# #n+ e'.e!"!e $ e!'#n"% #n e!4#&e $! he#! ee&

Re&$''en*"#$n $! he &h$#&e $ 'eh$*$! % #'##n+ e'.e!"!e $ e!'#nals inservice on their efects

Recommendations are given below onthe selection o methods according tolocal conditions o installation,practicability o installation, nature oequipment.

52/3/1 Te'.e!"!e $ e!'#n"% &"n e% #'#e* 7 $ne $! '$!e $ he $%%$#n+'e"!e:

52/3/1/1 L#'#"#$n $ &$nen $ en&%$!e(&%e &"#ne !n8#n+ &$n*#)

The %#'#"#$n $ &$nen $ !n8#n+ "n*&$n*# # !e&$''en*e* hen " +!e"n'e! $ ! #e !$' he "'e ."ne%6#n h# &"e # # .!ee!"%e $ e e4e!"%!n $ !n8#n+ $! &$n*#/

52/3/1/2 S."n+ eeen e#.'en #n$!*e! $ #'.!$4e n"!"% 4en#%"#$n/

S."n+ eeen "*"&en e#.'en .e!'#ee! *##."#$n $ he"/ I # ne&e"!7 $!ee! $ '"n"&!e!B #n!$n/ Th#

$%#$n # e.e"%%7 !e&$''en*e* hen "+!e" n'e! $ #e' $ e#.'en "!e#n"%%e* #n he "'e en&%$!e (&%e $!&"#ne)/

52/3/1/3 A..!$.!#"e "!!"n+e'en $ e#.-'en *##."#n+ he" #n#*e en&%$!e/

I # !e&$''en*e* h" e#.'en *##."#n+he" # #n"%%e* #n "n "..!$.!#"e "7 $ h"he &$!!e& $.e!"#$n $ $he! e#.'en #%%n$ e #'."#!e*/ Ohe! 'e"n &h " he#ne!.$##$n $ &!een $! *e%e&$! '"7 ee* $! h# .!.$e/

52/3/1/ N"!"% $! $!&e* 4en#%"#$n $! "#!-&$n*# #$n#n+ $ &%e &"#ne $! %$&"#$n/

F$!&e* 4en#%"#$n $ he e#.'en '"7 ene&e"!7 #n .e#& "..%#&"#$n $!e"'.%e $ .!$e& "+"#n #n+!e $ */

52/3/1/5 De!"#n+ $ e#.'en 7 e $e#.'en h"4#n+ h#+he! !"e* &!!en&$neen%7 *##."#n+ %e he"/

De!"#n+ $ e#.'en &"n e e* $ !e*&ehe e'.e!"!e $ e!'#n"% .!$4#*e* h"&h *e!"#n+ # .e!'#e* $! he e#.'en/

52/3/1/< Se%e$n $ '"e!#"% $! en&%$!e$ &%e $! &"#ne #n h#&h e!'#n"% "!e#n"%%e* #n $!*e! $ #'.!$4e he he!'"%*##."#$n/

52/3/1/? M"#nen"n&e $ &$!!e& &%"'.#n+ $&$n*&$! #n he e!'#n"%/

A!!"n+e'en h"%% e '"*e $ en!e he'"#nen"n&e $ & %"'.#n+ .!e!e $

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C1200-52 IEC: 1993 5

C%"e &%"e Re&$''en*"#$n

&$n*&$! #n he#! e!'#n"%/ S&h"!!"n+e'en '"7 e #%-#n ($! e"'.%e

e $ !e#%#en &$nne$n) $! !e% !$'#n!& #$n $! he #n.e& #$n $ he#n"%%"#$n/

52/3/2 The ee& $ e'.e!"!e ! #e $e!'#n"% #n n$!'"% e!4#&e &"n e %#'#e* 7$ne $! '$!e $ he $%%$#n+ 'e"n:

52/3/2/1 Se%e$n $ he #n%"#$n $&$n*&$! #n !e%" #$n $ he .!e'e*e'.e!"!e !#e/

I e%"$'e!#& #n%"#$n !"he! h"n he!'$-.%"#& # e* #n $!*e! $ #%#,e he#! h#+he!he!'"% !"#n+ # '"7 e ne&e"!7 $ *e!"ehe e#.'en $ h#&h he7 "!e &$nne&e*/

e!'##%e e'.e!"!e #n e"*7-"ee!4#&e $! $'e 7.e $ #n%"#$n $&$n*&$! "!e *ee!'#ne* 7 TC 20:

N"!"% !e!: 0 C

EA !e!: 110 C

C!!en-&"!!7#n+ &"."#e $ &$n*&$! he4"%e $ h#&h "!e +#4en #n "%e $ IEC

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C1200-52 IEC: 1993 <

C%"e &%"e Re&$''en*"#$n

&$n*&$! 7 &$n*&$! #n%"e*"..!$.!#"e%7/$! " #en %en+h/

$.e!"#n+ " " h#+h e'.e!"!e &h "$'e %'#n"#!e $! he"#n+ "..%#"n&e/

52/3/2/ Se."!" #$n $ &$n*&$! $ '%#&$!e &"%e eeen he en* $ hehe"h "n* he e!'#n"% %e"* $ " *e&!e"e#n he e'.e!"!e $ " 4"%e &$'."#%e #hhe .e!'##%e e'.e!"!e $ he #n%"#$n$ he &$n*&$!/

Ch$#&e $ " #en %en+h $! hee."!"#$n '"7 e "e* $n e.e!#'en $! $n" &"%&%"#$n "&&$!*#n+ $ IEC