Iec 60670 1 2015

Durin the in tal ation the temp rature may b outside the a ove temp rature ran e ac ordin to the clas ification of the b xes an the en los res.. Tests on b xes an en los res of in ulatin

electrical instal ations –

Boîes et env eloppes pour apparei lage électrique pour instal ations électriques

fixes pour usages domestiques et analogues –

Partie 1: Exigences générales

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electrical instal ations –

Part 1: General requir ements

Boî es et env eloppes pour apparei lage électrique pour instal ations électriques

fixes pour usages domestiques et analogues –

Partie 1: Exigences générales

INT ERNAT IONAL

ELECT ROT ECHNICAL

COMMIS ION

ELECT ROT ECHNIQUE

INT ERNAT IONALE

®

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FOREWORD 5

1 Sco e 7

2 Normative referen es 7

3 Terms an definition 8

4 General req irements 1

5 General notes on tests 1

6 Ratin s 1

7 Clas ification 12 8 Markin 13 9 Dimen ion 14 10 Protection again t electric s oc 14 1 Provision for e rthin 15 1 1 Boxes an en los res with exp sed con u tive p rts 15 1 2 Boxes an en los res of in ulatin material clas ified ac ordin to 7.2.2.2 and 7.2.2.3 16 1 3 Boxes or en los res with remova le sides ac ordin to 7.1.2 17 1 4 Earthin terminal thre d 1

7 12 Con tru tion 18 12.1 General 18 12.2 Lid , covers or cover-plates or p rts of them 18 12.2.1 General 1

8 12.2.2 Screw- yp fixin 18 12.2.3 Non-s rew- yp fixin o era le without the u e of a to l or a key 18 12.2.4 Non s rew- yp fixin o era le with the u e of a to l or a key 2

12.3 Drain holes 2

12.4 Mou tin of en los res 2

12.5 Boxes an en los res with inlets for flexible ca les 2

12.6 Boxes an en los res with inlets for a pl cation other than flexible ca les 2

12.7 Boxes an en los res with a ca le an horage(s) 2

12.8 Boxes an en los res with ca le retention me n 2

12.9 Knoc -outs inten ed to b removed by mec anical imp ct 2

12.9.1 General 2

12.9.2 Knoc -out retention 2

12.9.3 Knoc -out removal 2

12.9.4 Flat s rfaces s r ou din k oc -outs 2

12.10 Screw fixin s 2

12.1 Fixin of b xes an en los res clas ified ac ordin to 7.2.1 3

12.12 Fixin of flu h typ an semi- lu h typ b xes an en los res clas ified ac ordin to 7.2.2.1 3

12.13 Boxes an en los res clas ified ac ordin to 7.2.2.2 an 7.2.2.3 3

12.13.1 General 3

12.13.2 Boxes inten ed for mou tin on a wo d stru tural memb r of a wal 3

12.13.3 Boxes inten ed for mou tin to a wo den stru tural memb r of a cei n 3

12.13.5 Internal volume of b xes an en los res clas ified ac ordin to 7.2.2.2

an 7.2.2.3 3

12.13.6 Boxes inten ed for mou tin in a finis ed stru ture 3

12.14 Ca le glan entry 3

12.15 Boxes an en los res with inlets (outlets) or sp uts (h bs) for con uits 3

12.16 Internal volume of b xes an en los res 3

13 Resistan e to agein , protection again t in res of sol d o jects an again t harmful in res of water 3

13.1 Resistan e to agein 3

13.2 Protection again t the in res of sol d o jects 41

13.3 Protection again t harmful in res of water 4

14 In ulation resistan e an electric stren th 4

15 Mec anical stren th 4

15.1 General 4

15.2 Imp ct test at low temp rature 4

15.3 Compres ion test 5

15.4 Imp ct test for b xes an en los res 51

15.5 Compres ion test for en los res made of natural or s nthetic rub er or a mixture of b th 5

16 Resistan e to he t 5

16.1 Parts of in ulatin material neces ary to retain c r ent car yin p rts 5

16.2 Parts of in ulatin material not neces ary to retain c r ent car yin p rts 5

16.3 Boxes an en los res of in ulatin materials clas ified ac ordin to 7.2.2.2 or 7.2.2.3 5

16.3.1 Mec anical stren th 5

16.3.2 Parts of in ulatin material neces ary to retain p rts of the e rthin circ it 6

17 Cre p ge distan es, cle ran es an distan es throu h se l n comp u d 6

18 Resistan e of in ulatin material to a normal he t an fire 61

19 Resistan e to trac in 6

2 Resistan e to cor osion 6

21 Electromag etic comp tibi ty (EMC) 6

An ex A (informative) Examples of en los res an p rts there f 6

Biblogra h 6

Fig re 1 – Examples of membranes an grommets 10 Fig re 2 – Demon tration of the non-p netration of the internal volume 15 Fig re 3 – Earthin stra 16 Fig re 4 – Test stra 17 Fig re 5 – Ar an ement for test on covers or cover-plates (se 12.2.3.2 an 12.2.3.3) 2

Fig re 6 – Gau e for the verification of the outl ne of ld , covers or cover-plates 21

Fig re 7 – Examples of a pl cation of the gau e of Fig re 6 on covers fixed without s rews on a mou tin s rface or s p ortin s rface 2

Fig re 8 – Compl an e criteria of a pl cation of the gau e of Fig re 6 2

Fig re 9 – Gau e for verification of gro ves, holes an reverse ta ers 2

Fig re 10 – Sketc s owin the direction of a pl cation of the gau e of Fig re 9 2

Fig re 12 – Example of mou tin bloc for b xes to b emb d ed in masonry ( lu h

typ an semi- lu h typ ) 3

Fig re 13 – Example of the fixin of the au i ary device mou ted on a sp cimen 3

Fig re 14 – Example of test a p ratu for the test 3

Fig re 15 – Verification of fixin me n for b xes an en los res clas ified ac ordin to 7.2.2.1 3

Fig re 16 – Test of the force an me s rement of the displacement 3

Fig re 17 – Volume me s rement 3

Fig re 18 – Referen e s rfaces for b xes an en los res 4

Fig re 19 – Test wal 4

Fig re 2 – Example of the protected volume 4

Fig re 21 – Ap aratu for imp ct test at low temp rature 5

Fig re 2 – Mou tin bloc for flu h- yp b xes an en los res in order to ap ly blows on the re r s rface 5

Fig re 2 – Seq en e of blows for p rts A, B, C, D, E, F an G 5

Fig re 2 – Test devices for lo d compres ion test for en los res made of natural or s nthetic rub er or a mixture of b th 5

Fig re 2 – Rigid cros b r 6

Fig re 2 – Diagrammatic re resentation of the glow-wire test 6

Fig re A.1 – Examples of en los res an p rts there f 6

Ta le 1 – Clas ification of b xes an en los res ( o f2) 12 Ta le 2 – Forces to b a pl ed to l d , covers, cover-plates or actuatin memb rs whose fixin is not de en ent on s rews 19 Ta le 3 – Forces an torq es to b a pled to ca le an horages 2

Ta le 4 – Tig tenin torq es for the verification of the mec anical strength of s rews 3

Ta le 5 – Torq e test values for ca le glan s 3

Ta le 6 – Test voltage for electric stren th test 4

Ta le 7 – Determination of p rts A, B, C , D E, F an G 5

Ta le 8 – Heig t of fal for imp ct test 5

INTERNATIONAL ELECTROTECHNICAL COMMISSION

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intere te IEC Natio al Commite s

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4) In ord r to promote intern tio al u iformity, IEC Natio al Commite s u d rta e to a ply IEC Pu lc tio s

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th later

5) IEC its lf d e n t pro id a y ate tatio of c nformity In e e d nt c rtific tio b die pro id c nformity

a s s me t s rvic s a d, in s me are s, a c s to IEC mark of c nformity IEC is n t re p n ible for a y

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6) Al u ers s o ld e s re th t th y h v th late t e itio of this p blc tio

7) No la i ty s al ata h to IEC or its dire tors, emplo e s, s rv nts or a e ts in lu in in ivid al e p rts a d

memb rs of its te h ic l c mmite s a d IEC Natio al Commite s for a y p rs n l injury, pro erty d ma e or

oth r d ma e of a y n ture wh ts e er, wh th r dire t or in ire t, or for c sts (in lu in le al fe s) a d

e p n e arisin o t of th p blc tio , u e of, or rela c u o , this IEC Pu lc tio or a y oth r IEC

Pu lc tio s

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in is e s ble for th c r e t a plc tio of this p blc tio

9) Ate tio is drawn to th p s ibi ty th t s me of th eleme ts of this IEC Pu lc tio ma b th s bje t of

p te t rig ts IEC s al n t b h ld re p n ible for id ntifyin a y or al s c p te t rig ts

International Stan ard IEC 6 6 0-1 has b en pre ared by s bcommite SC 2 B: Plu s,

soc et outlets an switc es, of IEC tec nical commite 2 : Electrical ac es ories

This secon edition can els an re laces the first edition publs ed in 2 0 an its

Amen ment 1:2 1 This edition con titutes a tec nical revision

This edition in lu es the fol owin sig ificant tec nical c an es with resp ct to the previou

edition: Review of clas ification Ta le 1

The text of this standard is b sed on the fol owin doc ments:

Ful information on the votin for the a proval of this stan ard can b foun in the re ort on

votin in icated in the a ove ta le

This publ cation has b en draf ed in ac ordan e with the ISO/IEC Directives, Part 2

In this publ cation, the fol owin print typ s are u ed:

In this stan ard, the fol owin print typ s are u ed:

– req irements pro er: in roman typ ;

– test spe cific to s: in ialc typ e;

– e pla atory mater: in smaler roma ty e

A lst of al p rts in the IEC 6 6 0 series, publs ed u der the general title Bo xe s and

e nc losure s for ele ctric al a ce sso rie s fo r h use old and simiar fix d electric al instalato s

can b fou d on the IEC we site

The commit e has decided that the contents of this publ cation wi remain u c an ed u ti

the sta i ty date in icated on the IEC we site u der "htp:/we store.iec.c " in the data

related to the sp cific publ cation At this date, the publ cation wi b

• reconfirmed,

• with rawn,

• re laced by a revised edition, or

• amen ed

BOXES AND ENCLOSURES FOR ELECTRICAL ACCESSORIES FOR

HOUSEHOLD AND SIMILAR FIXED ELECTRICAL INSTALLATIONS –

Part 1: General requirements

1 Scope

This p rt of IEC 6 6 0 a ples to b xes, en los res an p rts of en los res (here fer cal ed

“b xes” an “en los res”) for electrical ac es ories with a rated voltage not ex e din

1 0 0 V a.c an 1 5 0 V d.c inten ed for hou ehold or simi ar fixed electrical in tal ation ,

either in o rs or outdo rs

Boxes an en los res complyin with this stan ard are s ita le for u e at ambient

temp ratures not normal y ex e din + 0 °C, but their average over a p riod of 2 h do s not

ex e d + 5 °C, with a lower l mit of the ambient air temp rature of − °C

Durin the in tal ation the temp rature may b outside the a ove temp rature ran e

ac ordin to the clas ification of the b xes an the en los res

This International Stan ard is inten ed to a ply to b xes an en los res for electrical

ac es ories within the s o e of IEC tec nical commite 2

This stan ard may b u ed as a referen e doc ment for other IEC tec nical commit e s an

s bcommit e s

A b x or an en los re whic is an integral p rt of an electrical ac es ory an provides

protection for that ac es ory again t external influen es ( or example mec anical imp ct,

in res of sol d o jects or water, etc.) is covered by the relevant stan ard for s c an

ac es ory

This stan ard do s not a ply to

– cei n roses;

– luminaire s p ortin couplers;

– b xes, en los res an p rts of en los res sp cifical y desig ed to b u ed for ca le

tru kin an du tin s stems complyin with IEC 610 4 an whic are not inten ed to b

in tal ed outside of these s stems

2 Normative refere ces

The fol owin doc ments, in whole or in p rt, are normatively referen ed in this doc ment an

are in isp n a le for its a pl cation For dated referen es, only the edition cited a pl es For

u dated referen es, the latest edition of the referen ed doc ment (in lu in an

2-IEC 6 1 2:2 0 , Me th d for th de te rminato o f the p ro f and th comparatv tra kin

indic e s o fso lid insu latn mate rials

IEC 6 4 3:2 0 , Co du it systems forc able manag me nt – Outside diame te rs ofc o ndu its for

ele c tric l instalato ns and threads for co du its and fi in s

IEC 6 5 9:19 9, Degre es of p rote cto n p ro ided b e c losure s (IP C o de )

IEC 6 5 9:19 9/AMD1:19 9/AMD2:2 13, De gre s o f prote c tio p ro vided by e clo sure s (IP

Code)

IEC 6 6 5-2-1 :2 0

2

, Fire ha ard te stn – Part 2-1 : Glowing/ho t-wire b asedte st meth ds

– Glo w-wire flammabi ty te st me th d fo r e d-p roducts

IEC 6 6 5-10-2:2 0

3

, Fire ha ard te stn – Part 10-2: Ab normalhe at – Bal p res u re test

IEC 6 9 1:2 0 , Extra-he av du ty rigid ste l c o ndu its

IEC 610 2:19 7, Pro te cto n o fp rso s and e u ipme t by e clo sure s – Pro be s fo r ve rific ato

IEC 61 4 :2 01, Prote c tio against ele c tric sh ck – Commo a p e c ts fo r instalato and

eq ipment

IEC 6114 :2 01/AMD1:2 0 , Pro te cto against ele ctric sho ck – Commo a pe cts fo r

instalato and equ ipme t

ISO/IEC Guide 51, Safety a pe cts – Guidelne s forth ir inclusio in standards

3 Terms and definitions

For the purp ses of this doc ment, the fol owin terms an definition a ply

3.1

enclos re

combination of p rts, s c as b xes, covers, cover-plates, l d , b x exten ion , ac es ories,

etc providin af er as embly an in talation as in normal u e, an a propriate protection

again t external influen es, and a defined protection again t contact with en losed l ve p rts

from an ac es ible direction

Note 1 to e try: Se An e A

3.2

box

p rt of an en los re provided with me n for fixin a cover, cover-plate, ac es ory, etc an

inten ed to receive ac es ories (s c as soc et outlets, switc es, etc.)

3.3

box exten ion

p rt of an en los re whic is inten ed to exten a b x for the purp se of either in re sin the

internal volume of the b x or en los re or to adju t for mou tin the b x flu h or semi- lu h

with the finis ed s rface of a wal or the lke

_ _ _ _ _ _

2

First e itio This e itio h s b e re la e in 2 14 b IEC 6 6 5-2-1 :2 14, Fire h z rd testn – Part 2-1 :

Glowing/h twire b sed test meth ds – G low-wire flamma i y test meth d for e d-produc ts (G WE T)

3

Se o d e itio This e itio h s b e re la e in 2 14 b IEC 6 6 5-10-2:2 14, Fire h z rd testn – Part

Note 1 to e try: Th c ntre p rtio of th c v r is rais d to a c mmo ate a s e ific wal or c i n thic n s a d

to p rmit th mo ntin of th a c s ory o it, flu h with th s rfa e of th wal or c i n

3.6

exposed con uctive part

con u tive p rt of electrical eq ipment, whic can b tou hed an whic is not normal y lve,

but whic can b come l ve when b sic in ulation fai s

device desig ed to p rmit the entry of a ca le, flexible ca le or in ulated con u tor into an

en los re, an whic provides se l n an retention an eventual y may also provide other

fu ction s c as e rthin , b n in , in ulation, ca le g ardin , strain rel ef or a combination

comp nent u ed to s p ort an protect the ca le or con uit at the p int of entry, whic may

also prevent the in res of moisture or contaminants

Note 1 to e try: Se Fig re 1

comp nent or an integral p rt of an en los re u ed to protect the ca le whic may b u ed to

s p ort the ca le or con uit at the p int of entry

Note 1 to e try: An e try membra e ma als pre e t th in re s of moisture or c ntamin nts a d ma b p rt of

a grommet (s e Fig re 1)

3.15

protecting membrane

comp nent or an integral p rt of an en los re that is not inten ed to b p netrated in normal

u e an is inten ed to provide protection again t in res of water or sol d o jects an /or to

Boxes an en los res s al b so desig ed an con tru ted that, in normal u e, their

p rforman e is rel a le an safety is ac ieved by red cin ris to a tolera le level, as defined

in ISO/IEC Guide 51

Comp liance is che ck d b mee tin al th rele vant re uireme nts and te sts sp e c ified

5 General notes on tests

5.1 Tests ac ordin to this stan ard are typ tests

Unles otherwise sp cified, b xes an en los res are tested as delvered

Ac es ories complyin with other stan ard are not tested again

Tests on b xes an en los res of in ulatin material s al b p rformed afer a

precon itionin of at le st 10 day at ambient temp rature an relative air h midity of

Unles otherwise sp cified, the tests are car ied out in the order of the clau es, at an ambient

temp rature b twe n +15 °C an + 5 °C on a set of thre sp cimen

In case of doubt, the tests are made at an ambient temp rature of +(2 ± 5) °C on a set of

thre new sp cimen

5.2 The sp cimen are s bmit ed to al the relevant tests an the req irements are

satisfied if al the tests are met

If one of the sp cimen do s not satisfy a test d e to an as embly or a man facturin fault,

that test and an precedin ones whic may have influen ed the res lts of the test s al b

re e ted an also the tests whic fol ow s al b made in the req ired seq en e on another

ful set of sp cimen , al of whic s al comply with the req irements

NOT Wh n s bmitin th first s t of s e ime s, th a plc nt c n als s bmit th a ditio al s t of s e ime s

whic ma b n c s ary, s o ld o e s e ime fai Th te tin statio wi th n, with ut furth r re u st, te t th

a ditio al s t of s e ime s a d wi o ly reje t if a furth r faiure o c rs If th a ditio al s t of s e ime s is n t

s bmite at th s me time, th faiure of o e s e ime wi e tai reje tio

6 Ratings

Se the relevant p rt of Parts 21 to 2 of the IEC 6 6 0 series

7 Classification

Boxes an en los res are clas ified ac ordin to Ta le 1 (Al clas ification referen es u ed

in this doc ment, directly refer to this ta le)

7.2.3 Surfa e mo ntin o wals,

c i n s, flo rs or furniture

7.3 Th ty e(s) of inlets (o tlets)

a

7.3.1 With inlets for s e th d

c ble for fix d in talatio s

7.3.2 With inlets for fle ible c ble

7.3.3 With inlets for plain or

7.3.7 With ut inlets Inlet o e in s

wi b ma e d rin in talatio

7.4 Th clampin me n 7.4.1 With c ble rete tio

7.4.2 With c ble a c ora e

7.4.3 With clampin me n for

Ta le 1 (2 o f2)

Cla sific tio criteria

7.6 Th d gre of prote tio a ain t a c s to h z rd u p rts a d a ain t h rmful efe ts d eto th in re s

of s ld foreig o je ts a c rdin to IEC 6 5 9 with a minimum d gre of IP 2X

7.7 Th d gre of prote tio a ain t h rmful efe ts d e to th in re s of water a c rdin to IEC 6 5 9

7.8 Th d gre of prote tio of th

Boxes an en los res may have more than one typ of inlet

NOT In th folowin c u trie th cla s Ha b x s a d e clo ure are u e : B , C , DE, FR, IT, NO, P , S ,

UK

8 Marking

8.1 Boxes an en los res s al b marked with

a) the name, trade mark or identification mark of the man facturer or the resp n ible ven or

In ad ition en los res s al b marked with:

b) the first c aracteristic n meral for the degre of protection again t ac es to hazardou

p rts an again t harmful efects d e to in res of sol d foreig o jects, if declared to b

hig er than 4 in whic case the secon c aracteristic n meral s al also b marked;

c) the secon c aracteristic n meral for the degre of protection again t harmful efects d e

to in res of water, if declared to b hig er than 2 in whic case the first c aracteristic

n meral s al also b marked;

d) the folowin markin on the cover of flu h en los res inten ed to b mou ted

on rou h s rfaces an where the IP is de en ent on the s rface (se Fig re 5)

The IP code, if a pl ca le, s al b marked on the outside of the en los re so as to b

e si y dis ernible when the en los re is mou ted an wired as for normal u e;

e) the typ referen e, whic may b a catalog e n mb r;

NOT In th folowin c u try th markin of th ty e refere c is n t u e : U

f for b xes an en los res clas ified as in 7.2.2.2 an 7.2.2.3, the minimum internal volume

in cm

3

as determined by the test in 12.16 The internal volume s al b marked on the

in ide of the b x or en los re The markin on a b x or en los re s al b s c that the

value can b re d afer in talation of the b x in the normal man er but b fore the

in tal ation of the wirin devices an wirin ;

The fol owin information s al b marked on the b xes an en los res or provided by the

man facturer on the smal est p c age u it or in the man facturer’s in tru tion whic ne d

not b provided with the prod ct:

IPXX

h) the neces ary information con ernin the o enin s whic can b made d rin in tal ation

in the case of b xes an en los res clas ified ac ordin to 7.3.7;

i) the minimum temp rature d rin in tal ation for b xes clas ified ac ordin to 7.5.2

an 7.5.3;

j) the s mb l Ha for b xes clas ified ac ordin to 7.2.2.1 an the s mb l Hb for b xes

clas ified ac ordin to 7.2.2.2 an 7.2.2.3

Unles self evident, further information for the cor ect u e of the en los re s al b given in

the man facturer’s in tru tion whic ne d not b provided with the prod ct

In sp cial cases, in order to ac ieve a hig er degre of protection by the u e of special p rts

an in tru tion s e t s ould b provided an s ould in icate the hig er degre of protection

In s c a case, the markin covers the initial degre of protection

8.2 The markin on the b xes an en los res s al b d ra le an e si y legible

Comp liance wih 8.1 and 8.2 is che cke d by insp cto n and by th folowing te st

Th te st is made b y rub b in th markin by hand for 15 s wih a pie c e of cloth soak d wih

wate r and again fo r 15 s wih a piece of c loth soake d wih p etroleum sp iri

NOT Markin ma e b mo ldin , pre sin or e gra in is c n id re d ra le a d is th refore n t s bje te to

this te t

It is recommen ed that the p troleum spirit u ed con ist of a solvent hexane with an aromatic

content of maximum 0,1 % by volume, a kauributanol value of a proximately 2 , an initial

b i n -p int of a proximately + 5 °C, a dry p int of a proximately + 9 °C and a den ity of

Boxes an en los res s al comply with the a pro riate stan ard s e ts, if an

Comp liance is che ck d b insp e c tio andme asure me t

10 Protection against ele tric s oc

Boxes an en los res s al b so desig ed that, when they are as embled, eq ip ed an

in tal ed as for normal u e in ac ordan e with the man facturer's in tru tion , l ve p rts are

not ac es ible

Where en los res are s p led without a cover, cover-plate or an ac es ory they are tested

with the a pro riate p rts fit ed ac ordin to the information given in the man facturer's

in tru tion

Comp liance is c he ck d b insp ectio andin c ase ofdoubt by th folowin te st

Enclo sures shal b e tested wih test p ro be 1 a c ordin to IEC 610 32 ap ple d fo r 1 min wih a

fo rc e of 2 N, and th test p rob e shal n t p n trate in th internalv lu me of th e clo sure ,

a sho wn in Figure 2

Fig re 2 – Demonstration of the non-penetration of the internal volume

Tests shal b e c aried o u t o parts whic h are a ces ible afte r instalato n

In ad i o , al e nc lo sures a c o rdin to 7.1.1, 7.1.3 and 7.1.4 wih parts made ofth rmo la tc

o r ela tome ric material shal b subjected for1 min to a fo rc e ap led thro u g h th tp of te st

prob e 1 o f IEC 610 3 2 b ut at an amb ie nt te mp rature of

+(35 ± 2) °C, th e nc lo sure b ein at

this te mpe rature

Th p rob e is ap ledto al p lac e s whe re yie ldin of insulatn material c ou ld impair th s fe ty

wih a fo rc e of75 N e xc ep t to membrane s, gromme ts and k o ck-ou ts o r th lke

Knoc -outs are tested ac ordin to 12.9.2

11 Provision for earthing

1 1 Boxes an enclos res with exposed con uctive parts

Boxes an en los res with exp sed con u tive p rts s al b provided with an e rthin

me n of low resistan e or have provision for the fit in of s c an e rthin me n For the

purp se of this req irement, smal s rews an the lke, for fixin b ses, covers or coverplates,

etc isolated from l ve p rts, are not con idered as exp sed con u tive p rts

Exp sed con u tive p rts of covers or cover-plates s al b con ected throu h a low

resistan e con ection to the e rthin me n when fited as for normal u e

Comp liance is c he ck d b y th folowin te st

A curre t deriv dfro m an a.c source havin a no -load v lag no t e xc eedin 12 Vande qu al

to (2 ± 1) A is p as ed b etwe n th e arthin te rminal andea h e xp osed co nductv part in

turn Th v lag dro betwee n th earthin terminal and eac h of th e xpo se d c o nductv

p arts is m ea ured, and th re sistanc e c lc u lated from th c urre t and this v lage drop

In n c se shal th re sistanc e e xce d 0,0 5 Ω

Care sho u ld b e take n that th co tact re sistan ce be twe n th tp of th me asurin p rob e and

th e xp osedc onductv p art u nde r te st do s no t influenc e th test re su lts

NOT In in ulatin b x s a d e clo ure h vin a IP d gre hig er th n IPX0, pro isio s c n b ma e for th

a ditio of me n for th efe tiv c ntin ity of th e rthin c n u tor, wh n more th n o e inlet is pro id d

The e rthin me n or the provision for the fit in of s c an e rthin me n s al b located

so that:

IE

∅12

– the removal of an ac es ory mou ted in the b x do s not disturb the contin ity of the

e rthin circ it, an

– the me n is not p rt of a remova le cover, bac , or side of the b x or en los re

Comp liance is c heck d b y insp e c tio

1 2 Boxes and enclos res of in ulating material clas ified ac ording to 7.2.2.2 and

7.2.2.3

Boxes an en los res of in ulatin material s al b provided with a minimum of one e rthin

stra havin one s rew terminal for e rthin purp ses with a connectin ca acity of at le st

4 mm

2

The desig of the e rthin stra s al en ure that the metal mou tin yokes of

ac es ories mou ted in ide the b x an metal c covers mou ted on the b x are con ected to

the e rthin con u tors (se Fig res 3 an 4)

D ime sio s in m il metres

Figure 4 – Test stra

Comp liance is c heck d b y insp e c tio

The e rthin stra s al b sec rely fastened to the b x or en los re

Comp liance is c heck d b y th te st in 16.3.2

1 3 Boxes or en los res with remova le sides ac ordin to 7.1.2

A b x or en los re clas ified ac ordin to 7.1.2 that has remova le sides s al b con tru ted

so that the electrical b n b twe n se ara le p rts in lu es at le st one thre ded s rew

con ection

Comp liance is c he ck d b y insp e c tio

1 4 Earthing terminal thre ds

The thre d of the e rthin terminal del vered with or integrated in b xes an en los res s al

not b strip ed when the torq e s own in the relevant column of Ta le 4 is a pl ed

Comp liance is c he ck d b y insp e c tio andby th folowin te st

Th s rews are tghte ned andloo sen ed 5 tme s

Th te st is made b y usin a su itab le s rewdrive r o r an ap p rop riate to l ap lyin a torqu e a

indicated in Tab le 4

If a s re w ha a he xag onal h adwih a slo t, o ly th te st wih th s rewdrive r is made, wih

th rele vant to rque giv n in column I o fTab le 4

G reate r valu es of to rque may b e used if so state d b y th manufa ture r, wh n th rele vant

informato is pro ided

Column I ap les to s rews which c an ot b e tg hte ed by means of a s rewdrive r wih a b lade

wide r than th n minal diamete r o f th e thre ad of th s re w

Column I ap les to oth r s rews wh ic h are tg te ed by means of a s re wdriv r

Column II ap le s to s re ws and nuts which are tg te nedby me ans oth r than a s re wdrive r

Column IV app lie s to s re ws which are tghte nedb y me ans ofa square b lade s re wdriv r

D urin th te st, the re shal be n damag e , such a b re akag o f s rew o r damag e to th h ad

IE

e nclo sure imp airin th furth r use of th fixin me ans Th s rews shal b e gradu aly

tg hte ed in o e smo th and co tnuous mo ve me t

12 Construction

12.1 General

Boxes an en los res s al b con tru ted without s arp ed es Bur s s al b removed from

mould l nes of interior s rfaces so that there are no s arp ed es or u d e o stru tion to the

p s age of wirin or coupl n of p rts in the inten ed u e of the prod ct

The in er an outer s rfaces of a b x or cover s al not b s bject to p eln , s al n or

flakin an s al b smo th an fre from bl sters, crac s, and other defects

Comp liance is c heck d b y insp e c tio

12.2 Lids, covers or cover-plates or parts of them

12.2.1 General

Lid , covers, or cover-plates or p rts of them, s c as protective membranes, whic are

inten ed to en ure protection again t electric s oc , s al b held in place ef ectively

It is recommen ed that the fixin me n of covers or cover-plates b ca tive The u e of

tig t fitin was ers of cardb ard or the l ke is de med to b an adeq ate method for sec rin

s rews inten ed to b ca tive

12.2.2 Screw- ype fixing

A b x or en los re inten ed to ac e t a ld, cover, or cover plate by me n of s rew fixin

s al b provided with me n to ac ommodate the inten ed s rews

Fo r lds, co ve rs o r c o ve r plate s who se fixin is of th s rew typ e, c omplanc e is c he cke d by

inspe cto

12.2.3 Non-s rew- ype fixin op ra le without the use of a tool or a key

12.2.3.1 General

A b x or en los re inten ed to ac e t a l d, cover, or cover plate with non-s rew- yp fixin

o era le without the u e of a to l or a key s al b provided with me n to fix the l d, cover,

or cover plate

Fo r lds, co vers o r co ve r-plates wh se remo valis o btain d by ap lyin a fo rc e a c o rdin to

th re qu ireme ts in Table 2 in a dire ctio app ro imately p e rp endicular to th

m ou ntn /suppo rtn surface wh n th ir re mo val may g iv a ce ss wih te st p robe B of

• co nductv parts se arate d from lv parts by dou ble o r reinforced insulato , o r

• lv parts o f SELVcircu its a c o rdin to IEC 6114 havin a v lage no t greate r than

Comp liance is c he ck d b y th te sts o f 12.2.3 2 and 12.2.3.3

Boxe s and e clo sure s are mo u nted a for no rmal use

Flush-yp e b o xe s and e c lo sure s are fixe d and instaled a fo r no rmal use If the y are

p ro vide d wih lockin means which c n b e op e rate d wih ut th aid o f a to l, the se means are

unlo cke d

12.2.3.2 Verification of the non-removal of the l ds, covers or cover-plates

Fo rc e s are gradu aly ap ple d in o e smoo th and c ontnu ous mo veme t in a dire cto n

p e rpe ndic u lar to th mountn surfac e s, in such a way that th resu ltn forc e a tn o th

ce ntre of th lds, c o vers o r co ve r-plate s, o r parts of th m, is a spe c ifie d in th rele vant

colu mn o fTable 2

Th fo rc e is ap led for 1 min

Th lds, cove rs o r co ve r-plate s, shal n t come o ff

Fo r flush-mou ntn bo xes o r e nc losu re s, th te st is th n re e ate d o n w sp e c ime ns, th ld,

co ve r or co ve r-plate is mo u ntedo n th bo x, afte r a sh e t of hard mate rial ( ± 0,1) mm thick,

ha bee fi edo th wal aro u nd th su pp o rtn frame, a sho wn in Figure 5

Th sh et o f hard material is used to simu late walp ape r and may c onsist of a numbe r o f

pie c e s

D ime sio s in m il metres

12.2.3.3 Verification of the removal of the l ds, covers or cover-plates

A fo rc e n t e ce din that spe cifie d in th re le vant c olu mn o fTab le 2 is gradualy ap pledin

o ne smoo th and c ontnu ous mo veme t, in a dire ctio pe rpe ndic ular to th

mou ntn /suppo rtng surfa es, to lds, co vers o r c o ve r-plate s, o r parts of th m b y means o f a

h o k p lace d in turn in ea h o f th groo ve s, h les, spa e s o r th lke , p ro ided forremo in

th m

Th lds, c o ve rs o r co er-plate s shal c ome o ff

Th te st is made 10 tme s o eac h se arab le part th fixin o f which is no t de pe de t o

s re ws (e u aly distrib utin a fara p ractic able th ap lc to p ints) th remo al force is

ap led eac h tme to th dife re t gro v s, h le s o r th lk p ro ided fo r remo vin th

se parable part

Fo r flush-mo u ntn bo xes o r e c losure s th te st is th n re eated o n w spe c ime s

Th ld, c o veror co ve r-plate is mou nted o th b x afte r a she et ofhardmate rial ( ± 0,1) mm

thick ha be en fi e d o th wal aro u nd th su pp ortn frame , a sh wn in Figu re 5

Afte r th test, th spe c ime s shal sho w n damag e wihin th me anin ofthis standard

IE

12.2.3.4 Verification of the outl ne of l ds, covers and cover-plates

Th gau ge sh wn in Figure 6 is push d towards eac h side of ea h ld, c o ve r o r co ve r-plate

whic h is fix d wiho u t s re ws o a mo u ntn o r su p po rtn surface, a sh wn in Figure 7 Th

fac e B re stn o n th mo u ntn /su p po rtn surfa e , wih th fac e A pe rpe ndic ular to i, th

gau ge is ap ple d at rig ht ang les to eac h side under te st

In th case of a ld, co ve r o r co ve r-plate fixe d wiho u t s re ws to ano the r ld, c o vero r cove

r-plate orto a mountn b x, havin th s me ou tln dime sio s, th fac e B of th gau ge shal

be plac ed at th s me le vel a th junctio n; th ou tln ofth ld, c o ver o r co ve r-plate shal

n t e xceed th o u tln o fth su p po rtn surfac e

Th distance s betwe n th fa e C of th gau ge and th ou tln of th side u nde r te st,

mea ure d p aralel to fac e B, shal n t de cre ase (wih th e xc ep tio n of groo ves, h le s, re ve rse

tape rs orth lke , pla ed at a distanc e le ss than 7 mm from a plan includin fa e B and

co mplyin wih th te st of 12.2.3 5) whe n mea ure me ts are re peated startn from p oint X in

D ime sio s in m il metres

Ca e a) a d b) d n t c mply

Ca e c), d), e) a d f c mply (c mpla c s al h we er, als b c e k d with th re uireme ts of 12.2.3.5 u in

th g u e s own in Fig re 9)

Fig re 8 – Compl ance criteria of a pl cation of the gau e of Fig re 6

12.2.3.5 Verification of grooves, holes and reverse ta ers

A g auge a c o rdin to Figure 9, ap led wih a force of ( ± 0 ,2) N, shal n t e te r mo re than

1,0 mm from th u pp e r part of an gro v , h le o r re erse tap er orth lk wh n th gau ge is

ap led paralelto th mo u ntn /su p po rtn surfa e and at right angle s to th part u nderte st,

IE

NOT Th v rific tio of wh th r th g u e a c rdin to Fig re 10 h s e tere more th n 1,0 mm is ma e with

refere c to a s rfa e p rp n ic lar to fa e B a d in lu in th u p r p rt of th o tln of th gro v s, h le ,

For l d , covers or cover-plates whose fixin is not de en ent on s rews an whose removal

is o tained by u in a to l an /or a key, in ac ordan e with the man facturer's in tru tion ,

compl an e is c ec ed by the same tests of 12.2.3 ex e t that the ld , covers or cover-plates

or p rts of them ne d not come of when a plyin a force not ex e din 12 N in direction

12.3 Drain holes

Surface an semi- lu h mou tin en los res with a degre of protection IPX1 to IPX6 s al b

desig ed to al ow the o enin of a drain hole of at le st 5 mm in diameter or 2 mm

2

in are

with a minimum width or len th of 3 mm

Drain holes s al b so located an avai a le in s c a n mb r that one of the holes can

alway b come ef ective in an inten ed mou tin p sition of the en los re

NOT A drain h le in th b c of th e clo ure is d eme to b efe tiv if th d sig of th e clo ure e s re a

cle ra c from th wal to pro id a drain g s a e for th water of at le st th siz s e ifie for th drain h le

Comp liance is che ck d b inspe c tio and mea ure me t

Inlets (outlets) provided in b xes an en los res clas ified ac ordin to 7.3.2 s al b so

desig ed an con tru ted that the flexible ca les can b e si y introd ced, an wi not

damage the flexible ca le where it enters the b x or en los re imp irin its further u e

Comp liance is c he ck d b manu al te st

An inlet o enin for con uit entries, or at le st two of them if there is more than one, s al b

ca a le of ac e tin either con uits of sizes, or a combination of sizes, in ac ordan e with

the req irements of IEC 6 4 3 n /or IEC 6 9 1

Comp liance is c he ck d b insp ectio wih th ap ro priate c bles o r c ondu its instale d

Inlet o enin s of adeq ate size may also b o tained by the u e of k oc -outs or s ita le

in ertion pieces or by me n of an a pro riate c tin to l

NOT In th folowin c u trie , it is re uire th t inlet o e in s in b x s inte d d to re eiv switc e or s c et

o tlets h v s o t(s) with inlets sto s: NL

12.7 Boxes an enclos res with a ca le an horage(s)

Clampin me n of b xes an en los res clas ified ac ordin to 7.4.2 s al b s c that the

con ection of the con u tors of the flexible ca le are rel eved from strain when this flexible

ca le is ac es ible an l kely to b stres ed afer in tal ation

It s al b cle r how the relef from strain an the prevention of twistin are inten ed to b

ef ected

Ca le an horages s al b

– s ita le for the dif erent typ s of flexible ca le for whic the b x is inten ed to b u ed;

– con tru ted in s c a way that at le st one p rt of it is integral with, or p rmanently fixed

to, one of the comp nent p rts of the b x;

– of in ulatin material or b provided with an in ulatin l nin fixed to the metal p rts

Comp liance is c he ck d b insp e ctio andth fo llowin te st

Th e ffectiv ne ss o fth c b le ancho rag is checke d b y means o f an ap paratus a sho wn

in Figu re 1

Th cab le ancho rage is ap led a in n rmal use, clamp ing s re ws, if an , b ein tg te e d

wih a torqu e e u al to th 2/3 of th re le vant to rque sp e c ified in Tab le 4 or, fo r g lands, e ual

to th rele vant to rqu e spe c ifie d in Tab le 5

Afte r rea semb ly ofth sp e c ime , i shal no t b e p s ible to p ush th fle ib le c able into th

sp e c ime n by more than 1 mm wih th re le ant fo rce a sp cifie d in Tab le 3

Th cable is the n su bjected 5 tme s for 1 s to a pu ll fo rc e a spe c ifie d in Tab le 3 and

immediately afte rwards th fle xib le c ab le is su b je cted to a torqu e n t les than th re le vant

valu e spe c ified in Table 3 fo r ( 5

After th te sts, th fle ib le c ble shal n t hav b ee displa ed by mo re than 2 mm and th

c b le anc horag e (strain relef) shal no t sh w an damag e whic h leads to no n-c omp liance wih

this standard

D ime sio s in m il metres

NOT In th folowin c u trie , a c ble rete tio is re uire for b x s a d e clo ure for h low wals d e to

in talatio pra tic s: DE

Comp liance is c he ck d by th folowin te st which is c arie d out o thre spe cime s of

re te to n means

For b xes an en los res clas ified ac ordin to 7.5.2 or 7.5.3, the test s al b car ied out at

(−15 ± 2) °C an (− 5 ± 2) °C resp ctively

First a c ble o f th maximu m n minal cro ss-se c tio nalarea and, su bse u e nty, a c able wih

th minimu m no minal cros -se cto nal area a de c lared b y th manufac ture r shal be used

Th c able is fi e d in th c ble rete to me ans ac cordin to th manufac tu re r‘s instructo s

Th c able is loaded wih an axialforce o f(20 ± 1) N

Th loadis maintain d fo r 1 min and at th en d o fthis pe rio d th displac e me t o f th c ble

shal no t e xce d 3 mm folowin th re mo val o fth load

IE

12.9 Knoc -outs intended to be removed by mec anical impact

12.9.1 General

It s al b p s ible to remove k oc -outs inten ed to b removed by mec anical imp ct

without damagin the b x

Knoc -outs inten ed for u e with ca les s al b fre from c ips or bur s

In k oc -outs inten ed for u e with con uits an /or a grommet or a membrane, c ips an

bur s are disregarded

In order to close an o en k oc -out in a b x or an en los re clas ified ac ordin to 7.1.2 a

blan in -plu can b u ed

This blan in -plu u ed without a loc n t

– s al not b come dislod ed or damaged, an

– its ef ectivenes s al not b imp ired, an

– it s al fulfi al req irements for k oc -outs

This req irement do s not a ply to a blan in -plu whic is as embled by thre din into a

thre ded inlet

Comp liance is c heck d b y insp e c tio andby th tests a sp e c ified in 12.9.2 and 12.9.3

12.9.2 Knoc -out retention

Fo r b ox s and e c lo sures having k o ck-o u ts that

– do n t p ro vide a ce ss to lv parts and are a ce ssible after instalato , a force of

(3 ± 1) N shal b e ap pled to a k o ck-out fo r ( 5 ± 1) s,

– p ro vide dire ct a ces to lv p arts afte r instalato , a fo rc e of (4 ± 1) N shal b app lied

to a k o ck-out fo r (60 ± 1) s,

by means ofa 6 mm diamete r mandrel wih a flat e nd

Th fo rce is to b e ap ple d wih u t a b low in a dire c tio p e rpe ndic ular to th plan of th

k ock-out and at a p int mo st lk ly to c use mo ve me t

Whe n th bo x is p ro vide d wih a mu lt stag k o ck-out, th fo rc e shal b e ap ple d to th

smale st k o ck-out

Th k o ck-o u t shal remain in plac e and th de re of p rotecto n of th b o x o r e nc losu re shal

be unc hange d wh n mea ured 1 h afte r th forc e ha bee remo ved

12.9.3 Knoc -out removal

Th k ock-outs shal b e re mo ve d by means of a to l, a stated by th manufa ture r Th side

e dge o f a s rewdrive r may b ru n alo g th e dge o f th k o ck-o u t op enin o c e to remo ve

an fragile tabs remainin alo g th edg

Forb o xe s o r e clo sure s a co rdin to 7.1.1 o r 7.1.3 th te st is rep eated wih o e p re viously

unte ste d b ox o r e c losure whic h ha b ee co di o nedfo r 5 h ± 10 min in air maintain d at

th minimum tempe ratu re durin instalato a spe cified a co rdin to 7.5 Immediate ly

Fo r a b o x o r e clo sure emplo yin mu lt stage k ock-ou ts, the re sh al b e n displac e me t of a

large r stag e wh n a smalerstage is remo ved

After th test, th re shal b e n sharp edges, e xc ep t fo r k ock-outs fo r c ondu its and/o r fo r use

wih a gromme t ora membran and th bo x ande c lo sure shal n t be damage d

12.9.4 Flat s rfaces s r oundin k oc -outs

Kno ck-outs inte ded fo r th use of gromme ts, g lands o r fi in s shal b e lo c ated in flat

surfac e s to pe rmi gro mmets, glands orfi in s to be seated fu lly against the se surfa e s whe n

instaleda inte ded

Proje c tio s o r inde tato s in th flat surfac e area shal be p ro ib ited, h we ve r h les shal b e

alowed Th flat surfac e are as of adja e t k ock-o u ts that partaly o r wh ly o erlap me et

th inte t of this re qu ireme t

Comp liance is c he ck d by inspe cto n and b y mea ure me t a co rdin to th ap p rop riate

nato alstandard sh e t, if an

12.10 Screw fixings

Fixin me n for l d , covers, cover plates, ac es ories, terminals, con ectin devices, strain

relefs, etc efected by s rews s al b so desig ed an con tru ted that these me n

with tan the mec anical stres es oc ur in d rin in talation an normal u e

Screws or other fixin me n made from in ulating material simi ar to s rews without

stan ardized thre d whic have to b tig tened by an to l for fixin covers s al b tested

ac ordin to the man facturer’s in tru tion

NOT In th folowin c u try flu h- y e b x s s al h v metal in erts a d b pro id d with metal s rews h vin

ISO metric thre d: NL

Thre d- ormin an thre d-c t in s rews inten ed only for mec anical as embly may b

u ed provided they are s p l ed together with one of the pieces with whic they are inten ed

to b as embled

For thre d- ormin an thre d-c tin s rews, the s rew as embly o eration s al b done

b fore car yin out the tests

Comp liance is che ck d b y insp e c tio andby th folowin test

Th s re ws o fth fixin means are tghte ed and loo se e d:

– 10 tme s fo r metal s rews in e gageme t wih a threado f insu latn mate rial

– 5 tme s in al othe r c ase s

Scre ws andnuts in e gag me nt wih a thread o finsu latn mate rial ands re ws o f insu latn

m ate rial are c o mplete ly re mo ve d and reinse rted ea h tme Th te st is made by usin a

su itab le s rewdrive r o r an ap p rop riate to l ap lyin a to rqu e a indicated in Tab le 4

Ifa s re w ha a h xag onalh ad wih a slo t, o ly th te st wih th s rewdrive r is made, wih

th rele vant to rque g iv n in column I of Tab le 4

G reate r valu e s of to rque may b e used if so state d b y th manufa ture r, wh n th rele vant

informato is pro ided

Column I ap le s

– to s rews which c n ot be tghte ed by means o f a s rewdriv r wih a b lade wide r than

th no minal diame te r of th thread of th s rew,

– to n n-metal c sc rews,

– to metal c s re ws in a thread of insu latn material In this late r c ase, th width o f th

p rofie o fth re ce ss to tg te n th s re w is cho se n inste ad ofth diamete r o fth thread

wh n this p ro fie width is smaler than th n minaldiamete r ofth thread wih a minimum

o f3 mm

Column I ap le s to oth rs rews whic h are tg te ed by means o f a s rewdrive r

Column I ap les to s rews and nuts which are tg te nedby me ans othe r than a s re wdrive r

Column IVapp lie s to s re ws which are tghte nedby me ans ofa square b lade s re wdriv r

Durin th test, the re shal be n damage , such a b re akag o fs rew o r damage to th h ad

slo t (e de rin th use of th ap p rop riate s rewdrive r imp s ible ) o r to th thre ads o r to

th e clo sure impairin th furthe r use of th fixin means Th s rews shal b gradualy

tghte ed in o e smo th and co tnuous mo eme t

Flu h typ b xes an en los res other than for hol ow wal s, an as otherwise in icated

b low, s al b provided with fixin me n for their s ita le at ac ment to the wal , cei n or

flo r Screws inten ed to fix the b x or en los re to the buidin stru ture ne d not b

s p l ed with the b x or en los re but can b provided by the in tal er ac ordin to the

man facturer’s in tru tion

Se arately s p l ed fixin me n for a b x or en los re s al comply with the req irements

for the fixin me n of the b x or en los re with whic they are inten ed to b u ed an s al

in lu e a me n for fixin to the b x or en los re

Screws, ad itional mec anical s p orts or desig fe tures, whic prevent the displacement of

NOT Ed e , rib , re e s s, p rtial e g s a d th lk are e ample of d sig fe ture inte d d to pre e t th

dis la eme t of th b x or th e clo ure

Comp liance is che ck d b insp e c tio

Boxe s and e nc lo su re s n t fulfi in at lea t o e o f th abo ve requireme ts and havin an

inte rnal v lume le ss than 40 0 c m

3

, shal b te sted a folows

Th internal v lume of th bo x o r e c lo sure shal be c he ck d by insp cto o r by th te st

in 12.16

Forb o xe s and parts o fe c lo sure s to b e emb d e d in ma o ry th spe c ime is mounted into

th mo u ntn b lo ck sh wn in Figure 12 and fix d a cordin to th manufacture r’s instructio s

Th gap betwe n th main e xte rnal profie of th sp e c ime n and th inte rnal p ro fie of th

rece ss in the mou ntn block shal be at lea t 2 mm andfo r parts that p roje c t from th main

p rofie n ve r le ss than 10 mm Th b lo ck is fi e d b y th mate rial spe c ified in th

manufa turer’s instructo s, o r b y p la te r wh re th manu fac ture r’s instruc tio s do n t sp e cify

th mate rial

Th a semb ly is k p t at amb ie nt tempe rature for ( 0 + 1/0) days

Th auxi ary de vice des ribed in Figure 13 is mo u nted o th sp ecime n and th s re ws are

tg hten d wih a to rqu e e u al to two thirds of th ap plc b le to rqu e giv n in Table 4

Th a sembly is th n fixe d to th mou ntn plate (A) of an ap aratus sh wn in Figure 14, so

that th ax s o fth s rews are no rmal to th mou ntn p lan

Th total weig ht of th de vice inc lu din th princ ip al weig ht (PW) shal b e (72 ± 0,1) N, and

th su p pleme tary weig t (SW) shal be (8 ± 0 ,1) N

Th su ppleme ntary weight (SW) and th p rinc ipal weig t (PW) are introduced o th axis of

th de ice and fix dby th c arie r (C ) (se e Figure 14)

Th supple me tary weight shal fal from a he ig ht o f 5 mm o to th p rinc ip al weight 10 tme s

Afte r th te st th spe c ime shal no t hav b e displac e d by mo re than 0,5 mm from th

mou ntn b lo ck

1 s e ime

2 pla ter

3 blo k of wo d

* Th g p b twe n th main e tern l profie of th b x a d th intern l profie of th re e s in th mo ntin blo k

s al b at le st 2 mm, a d for p rts whic proje t from th main profie n v r le s th n 10 mm

1 s p leme tary weig t (SW)

2 prin ip l weig t (PW)

3 c rier (C)

4 mo ntin plate (A)

Figure 14 – Example of test a paratus for the test

12.12 Fixing of flus type and semi- lus typ boxes and enclos res clas ified

ac ording to 7.2.2.1

Boxes an en los res for hol ow wal s or the l ke clas ified ac ordin to 7.2.2.1 s al have

s ita le me n for fixin the b x or the en los re to hol ow wals, hol ow cei n s, hol ow

flo rs or furniture

The fixin me n s al not rely on the ca le management s stem

Comp liance is c heck d b y th folowin te st

A spe c ime o f th bo x o r e nclo sure is mou nte d in a te st wal in ac cordance wih th

manufa ture r’s instructo s Whe re th manu facturer's instructo ns are n t spe c ific re ardin

th ty e ofwal, a sh e t ofp lywo od ( 0 ± 1) mm thick, 5 0 mm wide and 5 0 mm high shal

be used

a) Ch cking pu ll and to rqu e

A le ve r shal b e fix dwih th fixin me ans fo r ac ces o rie s o r cove rs to th sp cime , a

IE

3

2 1

4

4 °

This le e r is lo ade d fo r o e minu te wih a fo rce F1 a sho wn in Fig ure 15 a) in such a way

that a to rqu e (F1 × a) o f3 Nm is ap ple d to th b o x andsimultan o usly wih a fo rce F2 a

sh wn in Fig ure 15 b ) of10 0 N ap ple d o n th main axis of th b ox p rpe ndicularto th

mou ntn surfac e

Afterthis te st, th sp cime s shal sh w n damage imp airin th irfurthe r use and th

displa eme t of th le ve r shal be n mo re than 2

b) Che ckin displac em ent

Th e d o fth le ve r is sub je cted fo r 1 min to a fo rce F3 ap led to th s me p oint whe re

F1 wa app lied in suc h a way that a to rqu e (F3 × b) o f 3 Nm is ap led to th bo x a

sh wn in Figure 15 c)

Afte r th te st, th edge of th bo x shal no t hav bee disp lacedby more than 1 mm in

compariso to th mountn surfa e

Boxes an en los res for hol ow wal s or the l ke clas ified ac ordin to 7.2.2.2 an 7.2.2.3

s al have s ita le me n for fixin the b x or the en los re to hol ow wal s an hol ow

cei n s

The fixin me n s al not rely on the ca le management s stem

IE

12.13.2 Boxes inten ed for mounting on a wo d stru tural member of a wal

Th b ox shal b mounted a in no rmaluse to a (3 mm × 90 mm) wo od structu ral membe r o f

an c o nv nie t le gth so that th plan of th fro t o f th bo x is in ve rtc alp osi o

Th a sembly shal wihstand a fo rc e o f 2 5 N gradu aly ap pledc entraly fro m th b ase o f th

box fo r a pe riod of5 min

Afte r th remo al o f th force, the re shal b n pu lln o u t of th nais o r s re ws used to

mou nt th b o x o r mo veme t ofth fa e ofth b ox in th ho rizo tal plan of mo re than 3 mm

12.13.3 Boxes inten ed for mounting to a wo den structural member of a cei ing

Th bo x shal b mounteda in no rmaluse to a (3 mm × 19 0 mm) woo d struc tu ral member

o f an co ve nie t le gth so that th plan ofth fro nt of th b o x is in ho rizo tal po si o

Th a sembly shal wihstand a fo rc e of2 5 N gradu aly ap p lied ce traly fro m th fac e ofth

bo x fo r a pe rio d o f1 min

Wih th fo rce st l ap ple d, th de fle cto n of th fac e o f th bo x shal no t e xc eed 6 mm

mea ured from a plan paralel to th ho rizo talfa e o fth struc tural membe r

12.13.4 Boxes intended for mounting to a ste l-stud stru tural member of a wal

Th bo x shal b e mounted a in n rmal use to a ste lstudstructural me mbe r a sho wn in

Figu re 16

Th a semb ly shal wihstand a fo rc e of18 N gradu aly ap p lied ce traly fro m th fac e ofth

bo x fo r a pe riod o f5 min, first in a dire ctio te din to push th b ox into th wal o e in and

th n in th op po sie dire c tio , te din to pu ll th bo x out of th o e ning

Wih th fo rc e st l ap led, th defle c tio ofth b o x shal n t e xce d 2 mm in eihe r dire cto n

NOT Ad itio al s p ort for th b x c n b n c s ary tominimiz d fle tio

Ap lcation of the force an me s rement of the displacement are s own in Fig re 16

D ime sio s in m il metres

For b xes, en los res, raised covers an b x exten ion clas ified ac ordin to 7.2.2.2 an

7.2.2.3, the declared internal volume of a b x, en los re, raised cover or b x exten ion s al

IE

A b x or en los re provided with a p rtition s al have the volume of e c p rtitioned section

verified

Comp liance is c heck d b y th te st o f 12.16

12.13.6 Boxes inten ed for mounting in a finis ed structure

The s p ortin me n of a b x inten ed for in tal ation in a finis ed stru ture s al not crac

or bre k nor s al the face of the b x b p rmanently displaced more than 3,2 mm from the

plane of the face of the test s rface when me s red 1 min afer the test lo d is removed

NOT In a finis e stru ture, stru tural framin memb rs are n t ty ic ly a c s ible for mo ntin a d s p ortin

b x s or e clo ure flu h or s mi-lu h in h low wals

Comp liance is che ck d b th folowin te st

Six b o xe s inte ded fo r use in wals o r eig ht bo xe s inte ded fo r use in cei ngs shal b

instaledin a 9,5 mm thic k plywoo d sh e t re info rc e d wih a su pp ort 15 mm from o e e dg e o f

th o pe in fo r th bo xe s, or in a finish d surfa e in a co rdance wih th manufa ture r’s

instructo ns

Scre ws for th b ox suppo rtn means shal be tghte e d in a c o rdanc e wih th

m anufa ture r’s instructio s In th abse ce of instructo s, s re ws shal b e tghte e d in

a co rdance wih column IV of Tab le 4 A s re w that strip s be fore b ein tg hte ed to th to rqu e

sp e c ified shal n t o ve rride mo re than o c e

Folowin instalato n, a fo rce o f 2 2 N shal b e ap ledfo r 5 min co se cu tiv ly to e ac h of two

bo xes in a dire cto n no rmal to th plan o fth fa e of th test surface alo ng th c e nte rln of

th b o x, and te nding to p ush th b o x into th op ening Th s me fo rc e is to b e ap ledto

e ach of two p re viously unte ste d b oxe s in a directo te din to pu ll th bo x out o f th

o pe in Folowin this te st, th sc rew shal b c p ab le of b in re mo ve d b y a s rewdrive r

Two ad i o al s mples o f a bo x se cure d so that th plan of th fro nt of th bo x is v rtc al,

shal be sub je cted to a force of 2 2 N ap led fo r 5 min suspe nde d fro m th lowerrear co rne r

o f th o u te r back e dge o f th box

12.14 Ca le gland entry

Ca le glan s s al not damage the b x or en los re when u ed as inten ed

Comp liance is che ck d b y th folowin te st

Cable glands are fi ed wih a cylndric al metalrod havin a diamete r, in mi ime tres, e u al to

th inte rnal diameter o f th g aske t rou nded to th n arest who le nu mb e r a spe c ifie d in th

first colu mn of Table 5 Th cable glands are the n tg te ned and loo se ed 10 tme s b y means

o f a su itab le to ol wih th to rqu e sp ecified in Table 5 wih a tole rance o f(

5

0+

) %, th rele vant

to rque b in ap led fo r 1 min ± 5 s

12.15.1 Bo xe s and e c losure s c la sifie d a c o rdin to 7.3.4 and conic l spo u ts a in 7.3.6

shal wihstandth te sts o f 12.15.2, 12.15.3 and 12.15.4

Thre ade d sp outs are n t submi e d to th te sts o f 12.15.2 and 12.15.3

Boxe s and e c losure s cla sifie d a c o rdin to 7.4.3 shal wihstand th te sts of su bc lause s

12.15.2 and 12.15.3

Th te sts are caried ou t wih co du its of minimum no minal size a co rdin to IEC 60 42 o r

IEC 6098 1 afte r instalato n a in no rmal use o r a semb ly a c o rdin to th manufa ture r’s

instructo ns

12.15.2 Enclo sure s wih th inlet sp ou t fo r co duits, if an , shal be te ste d so that a minimum

size p ie c e o f co du it is p re ssedfo r 1 min ± 5 s wih a fo rc e of( 0 0 ± 2) N Th inle t sp ut

shal p re ve nt furth re ntry of th condu it into th b o x

12.15.3 A p u llout te st shal b c aried out afte r th te st a co rdin to 12.15.2, a folows Th

co du it wih th minimu m size core sp ondin to th inse rt o e nin shal be loaded axialy for

1 min wih a te sie fo rc e o f(2 ± 2) N Th condu it shal no t c ome lo ose from th inle t sp ou t

o f th e clo sure

12.15.4 Th re sistanc e to bendin strain of an inlet sp ut shal be te ste d a folo ws A piece

o f a co du it shal b inserted into th inlet spo u t wih a c o mp res ib le fo rc e of ( 0 0 ± 2) N and

lo ade d wih a b endin mo me t of3 Nm Th strain shal slowly rise from zero to full valu e and

th te st shal b e do e in six dife re t dire c tio s throu gh th ce tre ln of th inle t sp ou t wih

an inte rval o f (6 ± 2)° At each angle po si o th inlet sp ut shal be loaded fo r 1 min

Th inlet sp ut shal n t come lo se o r b damaged and th c o ndu it shal stay wihin th

inlet sp ou t

NOT An inlet sto c n b d sig e a a rib o th in id of th inlet s o t

12.16 Internal volume of b xes an enclos res

Whe n re fe rre d to in this standard, th de c lare d internal v lume of th b o x o r e c lo sure , ea h

p art io ed se c tio o f a b o x ore closure , raised c o ve rs and bo x e xte sio s shal b e mea ure d

in th fo llo win man e r

a) Al inte rnals rews, c lamp s, etc, shal b e remo ved e xc e pt earthin terminals and a sembly

s re ws

b) An p rojectio s suc h a a co ve r o r flush-mountn e ars that e xte d be yo d th no rmal