SIST EN 60670-24:2013/A11:2023
(Amendment)Boxes and enclosures for electrical accessories for household and similar fixed electrical installations - Part 24: Particular requirements for enclosures for housing protective devices and other power dissipating electrical equipment
Boxes and enclosures for electrical accessories for household and similar fixed electrical installations - Part 24: Particular requirements for enclosures for housing protective devices and other power dissipating electrical equipment
To cover requirements for boxes and enclosures with provision for suspension means
Dosen und Gehäuse für elektrische Installationsgeräte für Haushalt und ähnliche ortsfeste elektrische Installationen - Teil 24: Besondere Anforderungen für Gehäuse zur Aufnahme von Schutzgeräten und ähnlichen energieverbrauchenden Geräten
Boîtes et enveloppes pour appareillage électrique pour installations électriques fixes pour usages domestiques et analogues - Partie 24: Exigences particulières pour enveloppes pour appareillages de protection et autres appareillages électriques ayant une puissance dissipée
Omarice in ohišja za električno opremo za gospodinjstvo in podobne nepremične električne inštalacije - 24. del: Posebne zahteve za ohišja stanovanjskih zaščitnih naprav in druge električne opreme, ki porablja energijo - Dopolnilo A11
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN 60670-24:2013/A11:2023
01-julij-2023
Omarice in ohišja za električno opremo za gospodinjstvo in podobne nepremične
električne inštalacije - 24. del: Posebne zahteve za ohišja stanovanjskih zaščitnih
naprav in druge električne opreme, ki porablja energijo - Dopolnilo A11
Boxes and enclosures for electrical accessories for household and similar fixed electrical
installations - Part 24: Particular requirements for enclosures for housing protective
devices and other power dissipating electrical equipment
Dosen und Gehäuse für elektrische Installationsgeräte für Haushalt und ähnliche
ortsfeste elektrische Installationen - Teil 24: Besondere Anforderungen für Gehäuse zur
Aufnahme von Schutzgeräten und ähnlichen energieverbrauchenden Geräten
Boîtes et enveloppes pour appareillage électrique pour installations électriques fixes
pour usages domestiques et analogues - Partie 24: Exigences particulières pour
enveloppes pour appareillages de protection et autres appareillages électriques ayant
une puissance dissipée
Ta slovenski standard je istoveten z: EN 60670-24:2013/A11:2023
ICS:
29.120.99 Druga električna dodatna Other electrical accessories
oprema
SIST EN 60670-24:2013/A11:2023 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
---------------------- Page: 1 ----------------------
SIST EN 60670-24:2013/A11:2023
---------------------- Page: 2 ----------------------
SIST EN 60670-24:2013/A11:2023
EUROPEAN STANDARD EN 60670-24:2013/A11
NORME EUROPÉENNE
EUROPÄISCHE NORM May 2023
ICS 29.120.10
English Version
Boxes and enclosures for electrical accessories for household
and similar fixed electrical installations - Part 24: Particular
requirements for enclosures for housing protective devices and
other power dissipating electrical equipment
Boîtes et enveloppes pour appareillage électrique pour Dosen und Gehäuse für elektrische Installationsgeräte für
installations électriques fixes pour usages domestiques et Haushalt und ähnliche ortsfeste elektrische Installationen -
analogues - Partie 24: Exigences particulières pour Teil 24: Besondere Anforderungen für Gehäuse zur
enveloppes pour appareillages de protection et autres Aufnahme von Schutzgeräten und ähnlichen
appareillages électriques ayant une puissance dissipée energieverbrauchenden Geräten
This amendment A11 modifies the European Standard EN 60670-24:2013; it was approved by CENELEC on 2023-01-26. CENELEC
members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this amendment the
status of a national standard without any alteration.
Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC
Management Centre or to any CENELEC member.
This amendment exists in three official versions (English, French, German). A version in any other language made by translation under the
responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the same status as
the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the
Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Türkiye and the United Kingdom.
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2023 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN 60670-24:2013/A11:2023 E
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SIST EN 60670-24:2013/A11:2023
Contents Page
European foreword . 3
1 Modification to Clause 1, “Scope” . 4
2 Modification to Clause 3, “Definitions” . 4
3 Modification to Clause 7, “Classification” . 4
4 Modifications to Clause 8, “Marking” . 4
5 Modifications to Clause 10, “Protection against electric shock” . 4
6 Modifications to Clause 12, “Construction” . 4
7 Modification to Clause 15, “Mechanical strength” . 5
8 Modification to Clause 16, “Resistance to heat” . 5
9 Modification to Clause 18, “Resistance of insulating material to abnormal heat and to fire” . 5
10 Modifications to Clause 101, “Verification of the maximum capability to dissipate power (P )” . 6
de
11 Modifications to Clause 102, “Verification of temperature rise” . 6
12 Addition of Clause Z1, "Electromagnetic fields (EMF) requirements" . 7
13 Modifications to Annex AA, “Instructions to be given by the manufacturer of the GP enclosure to the
installer how to integrate accessories, and example of calculation” . 7
14 Modifications and additions to annexes . 11
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SIST EN 60670-24:2013/A11:2023
EN 60670-24:2013/A11:2023 (E)
European foreword
This document (EN 60670-24:2013/A11:2023) has been prepared by CLC/TC 23BX "Switches, boxes and
enclosures for household and similar purposes, plugs and socket outlet for D.C.".
The following dates are fixed:
• latest date by which this document has to be (dop) 2023-11-05
implemented at national level by publication of
an identical national standard or by
endorsement
• latest date by which the national standards (dow) 2026-05-05
conflicting with this document have to be
withdrawn
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CENELEC shall not be held responsible for identifying any or all such patent rights.
This Part 24 is read in conjunction with EN IEC 60670-1:2021 and EN IEC 60670-1:2021/A11:2021. It lists
the changes necessary to convert that standard into a specific standard for housing protective devices and
other power dissipating electrical equipment
This document has been prepared under a Standardization Request given to CENELEC by the European
Commission and the European Free Trade Association, and supports essential requirements of EU
Directive(s) / Regulation(s).
For relationship with EU Directive(s) / Regulation(s), see informative Annex ZZ, which is an integral part of
this document.
Any feedback and questions on this document should be directed to the users’ national committee. A
complete listing of these bodies can be found on the CENELEC website.
3
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SIST EN 60670-24:2013/A11:2023
EN 60670-24:2013/A11:2023 (E)
1 Modification to Clause 1, “Scope”
Add the following paragraph before NOTE 1:
“This document does not apply to surface type boxes, flush and semi-flush type boxes suitable for the
housing of accessories for household and similar use such as switches, electronic switches, socket- outlets,
which are covered by EN 60670-1 only.”
2 Modification to Clause 3, “Definitions”
Replace the definition 3.106 with the following:
“3.106
rated current
I
n
maximum current assigned by the manufacturer of the enclosure which can be distributed by the enclosure”
3 Modification to Clause 7, “Classification”
rd
Replace the 3 line with:
“Classification criteria 7.6, 7.8.1 and 7.9 do not apply.”
4 Modifications to Clause 8, “Marking”
In 8.1, delete item i).
In 8.1, replace the sentence before item g) with:
“The following information shall be marked on the boxes and enclosures or provided by the manufacturer on
the smallest package unit or in the manufacturer’s instructions which need not be provided with the product:”
5 Modifications to Clause 10, “Protection against electric shock”
nd
Delete the sentence “Deletion of the 2 paragraph.”
Deletion of the 6th and 7th (penultimate) paragraphs.
In 10.101, replace item a) with:
“a) covers live parts of the installed equipment with insulation material, and”
In 10.101, replace the paragraph after “Tests shall be carried out on parts which are accessible after
installation.” with:
“In addition, all enclosures according to 7.1.1, 7.1.3 and 7.1.4 with parts of thermoplastic or elastomeric
material shall be subjected for 1 min to a force applied through the tip of test probe C of IEC 61032 but at an
ambient temperature of (35 ± 2) °C, the enclosure being at this temperature.”
6 Modifications to Clause 12, “Construction”
This clause is applicable with following modification:
12.2.3 Non-screw-type fixing operable without the use of a tool or a key
Addition at the end of the clause of following sentence:
“This clause is not applicable for blanking plates”
4
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SIST EN 60670-24:2013/A11:2023
EN 60670-24:2013/A11:2023 (E)
12.2.4 Non screw-type fixing operable with the use of a tool or a key
Addition at the end of the clause of following sentence:
“This clause is not applicable for blanking plates”
Replace the title numbering and the title of 12.11 with:
“12.12 Fixing of flush type and semi-flush type enclosures classified according to 7.2.2.1”
In 12.12, replace the paragraph below “Replacement:” with:
“Enclosures for hollow walls classified according to 7.2.2.1 shall provide suitable means for fixing the
enclosure to hollow walls.”
7 Modification to Clause 15, “Mechanical strength”
In 15.101, add at the end:
“After the test, the specimens shall show no damage leading to non-compliance with the standard.
Damage to the finish, small dents and small chips which do not adversely affect the protection against
electric shock or harmful ingress of water are disregarded.
Cracks passing through the material not visible with normal or corrected vision without magnification, surface
cracks in fibre-reinforced mouldings and small indentations are disregarded.”
8 Modification to Clause 16, “Resistance to heat”
Replace the text of Clause 16 with:
“This clause of Part 1 is applicable with following modification:
Delete 16.3 "Boxes and enclosures of insulation materials classified according to 7.2.2 or 7.2.2.3”
9 Modification to Clause 18, “Resistance of insulating material to abnormal heat
and to fire”
Replace the text of Clause 18 with:
“This clause of Part 1 is applicable with the following modifications:”
Replace the bullet points with the following:
— By test made at 960 °C
— for parts of insulating material necessary to retain current-carrying parts in position.
— By the test made at 850 °C
— for parts of insulating material, necessary to retain parts of the earthing circuit in position (with the
exception of parts of insulating material needed to retain the earth terminal in position in an
enclosure), and
— for parts of insulating material of boxes and enclosures classified according to 7.2.2.1, with the
exception of parts protruding from the wall and additional and/or removable internal parts of
enclosure (e.g. separator) not necessary to retain current carrying parts in position.
— By the test made at 650 °C
— for parts of insulating material not necessary to retain current-carrying parts in position (even though
they are in contact with them), and
— for parts of insulating material retaining earthing terminal in position.
5
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SIST EN 60670-24:2013/A11:2023
EN 60670-24:2013/A11:2023 (E)
— for parts of insulating material of boxes and enclosures classified according to 7.2.2.1, protruding
from the wall and additional and/or removable internal parts of enclosure (e.g. separator) not
necessary to retain current carrying parts in position.
NOTE Accessories complying with other standards, e.g. connecting devices incorporated but not integrated into the
enclosure, are not considered as part of the enclosures.”
10 Modifications to Clause 101, “Verification of the maximum capability to dissipate
power (P )”
de
th th th
Replace the 10 , 11 and 12 sentence with:
“For enclosures according to 7.2.1.1 and 7.2.2.1 the test is carried out with the specimen mounted as
declared by the manufacturer.
For enclosures according to 7.2.3 the specimen is mounted on a minimum 19 mm thick plywood painted
black.
For enclosures according to 7.2.1.2 and 7.2.1.3 the test is carried out with the specimen cast in a concrete
wall of thickness not less than 100 mm on each surface; it is allowed to cast the specimen in walls of
different material, with equivalent thermal conductivity.”
11 Modifications to Clause 102, “Verification of temperature rise”
Replace the 7th, 8th and 9th sentence with:
“For enclosures according to 7.2.1.1 and 7.2.2.1 the test is carried out with the specimen mounted as
declared by the manufacturer.
For enclosures according to 7.2.3 the specimen is mounted on a minimum 19 mm thick plywood painted
black.
For enclosures according to 7.2.1.2 and 7.2.1.3 the test is carried out with the specimen cast in a concrete
wall of thickness not less than 100 mm on each surface; it is allowed to cast the specimen in walls of
different material, with equivalent thermal conductivity.”
In the Keys to Figures 103 and 104, add the following additional line:
“= the resistor is placed at equal distance from both sides with a tolerance on the difference of ±5 mm.”
Replace the paragraph before Table 102 with the following:
“The specimen is loaded with its rated current (In ). This current shall be distributed amongst the smallest
possible number of outgoing circuits, with a minimum of 2, so that each of these circuits is loaded with its
rated current multiplied by the rated diversity factor, as stated in Table 102. In the case where the exact total
load cannot be obtained by a number of devices loaded to this current, only the last loaded circuit shall be
loaded to a lower value to give the correct total.”
Add the following paragraph before Table 102:
“When only one circuit is possible, the specimen is loaded at In with one device. The device rating is
selected taking into consideration the diversity factor as given in Table 102 and the value adjusted to the
closest higher rating.
NOTE As an example, a 50 A enclosure would be tested with a 63 A device.”
Replace the content of the first cell of the second line of Table 102 with the following:
“1, 2 and 3”
Replace the second paragraph after Table 102 with the following:
“The temperature rise measured on the terminals for external conductors of the outgoing devices shall not
exceed the values defined in the relevant standard in a steady-state condition (variation less than 1 K/h).”
6
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SIST EN 60670-24:2013/A11:2023
EN 60670-24:2013/A11:2023 (E)
12
...
SLOVENSKI STANDARD
SIST EN 60670-24:2013/oprAA:2021
01-november-2021
Omarice in ohišja za električno opremo za gospodinjstvo in podobne nepremične
električne inštalacije - 24. del: Posebne zahteve za ohišja stanovanjskih zaščitnih
naprav in druge električne opreme, ki porablja energijo
Boxes and enclosures for electrical accessories for household and similar fixed electrical
installations - Part 24: Particular requirements for enclosures for housing protective
devices and other power dissipating electrical equipment
Dosen und Gehäuse für elektrische Installationsgeräte für Haushalt und ähnliche
ortsfeste elektrische Installationen - Teil 24: Besondere Anforderungen für Gehäuse zur
Aufnahme von Schutzgeräten und ähnlichen energieverbrauchenden Geräten
Boîtes et enveloppes pour appareillage électrique pour installations électriques fixes
pour usages domestiques et analogues - Partie 24: Exigences particulières pour
enveloppes pour appareillages de protection et autres appareillages électriques ayant
une puissance dissipée
Ta slovenski standard je istoveten z: EN 60670-24:2013/prAA
ICS:
29.120.99 Druga električna dodatna Other electrical accessories
oprema
SIST EN 60670-24:2013/oprAA:2021 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
---------------------- Page: 1 ----------------------
SIST EN 60670-24:2013/oprAA:2021
---------------------- Page: 2 ----------------------
SIST EN 60670-24:2013/oprAA:2021
EUROPEAN STANDARD DRAFT
EN 60670-24:2013
NORME EUROPÉENNE
EUROPÄISCHE NORM
prAA
August 2021
ICS 29.120.10
English Version
Boxes and enclosures for electrical accessories for household
and similar fixed electrical installations - Part 24: Particular
requirements for enclosures for housing protective devices and
other power dissipating electrical equipment
Boîtes et enveloppes pour appareillage électrique pour Dosen und Gehäuse für elektrische Installationsgeräte für
installations électriques fixes pour usages domestiques et Haushalt und ähnliche ortsfeste elektrische Installationen -
analogues - Partie 24: Exigences particulières pour Teil 24: Besondere Anforderungen für Gehäuse zur
enveloppes pour appareillages de protection et autres Aufnahme von Schutzgeräten und ähnlichen
appareillages électriques ayant une puissance dissipée energieverbrauchenden Geräten
This draft amendment prAA, if approved, will modify the European Standard EN 60670-24:2013; it is submitted to CENELEC members for
enquiry.
Deadline for CENELEC: 2021-11-05.
It has been drawn up by CLC/TC 23BX.
If this draft becomes an amendment, CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which
stipulate the conditions for giving this amendment the status of a national standard without any alteration.
This draft amendment was established by CENELEC in three official versions (English, French, German).
A version in any other language made by translation under the responsibility of a CENELEC member into its own language and notified to
the CEN-CENELEC Management Centre has the same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the
Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.
Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are aware and to
provide supporting documentation.
Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without notice and
shall not be referred to as a European Standard.
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2021 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Project: 72934 Ref. No. EN 60670-24:2013/prAA E
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SIST EN 60670-24:2013/oprAA:2021
EN 60670-24:2013/prAA:2021 (E)
European Foreword
This document (EN 60670-24:2013/prAA:2021) has been prepared by CLC/TC 23BX "Switches,
boxes and enclosures for household and similar purposes, plugs and socket outlet for D.C.".
This document is currently submitted to the Enquiry.
The following dates are proposed:
• latest date by which the existence of this (doa) dor + 6 months
document has to be announced at national
level
• latest date by which this document has to be (dop) dor + 12 months
implemented at national level by publication of
an identical national standard or by
endorsement
• latest date by which the national standards (dow) dor + 36 months
conflicting with this document have to be (to be confirmed or
withdrawn modified when voting)
This document has been prepared under a Standardization Request given to CENELEC by the
European Commission and the European Free Trade Association, and supports essential
requirements of EU Directive(s) / Regulation(s).
For relationship with EU Directive(s) / Regulation(s), see informative Annex ZZ, which is an integral
part of this document.
2
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SIST EN 60670-24:2013/oprAA:2021
EN 60670-24:2013/prAA:2021 (E)
1 Modification to Clause 1, “Scope”
Add the following paragraph before NOTE 1:
“This standard does not apply to surface type boxes, flush and semi-flush type boxes suitable for the
housing of accessories for household and similar use such as switches, electronic switches, socket-
outlets, which are covered by EN 60670-1 only.”
2 Modification to Clause 7, “Classification”
rd
Replace the 3 line with:
“Classification criteria 7.2.2.2, 7.2.2.3, 7.6, 7.8.1 and 7.9 do not apply.”
3 Modifications to Clause 8, “Marking”
In 8.1, item i), replace “IEC 60670-24” with “EN 60670-24”.
In 8.1, replace the sentence before item g) with:
“The following information shall be marked on the boxes and enclosures or provided by the
manufacturer on the smallest package unit or in the manufacturer’s instructions which need not be
provided with the product.”
4 Modifications to Clause 10, “Protection against electric shock”
nd
Delete the sentence “Deletion of the 2 paragraph.”
In 10.101, replace item a) with:
“a) covers live parts of the installed equipment with insulation material, and”
In 10.101, replace “IEC 61032” with “EN 61032”.
In 10.101, replace the paragraph after “Tests shall be carried out on parts which are accessible after
installation.” with:
“In addition, all enclosures according to 7.1.1, 7.1.3 and 7.1.4 with parts of thermoplastic or
elastomeric material shall be subjected for 1 min to a force applied through the tip of test probe C of
EN 61032 but at an ambient temperature of (35 ± 2) °C, the enclosure being at this temperature.”
5 Modifications to Clause 12, “Construction”
Replace the title numbering and the title of 12.11 with:
“12.12 Fixing of flush type and semi-flush type enclosures classified according to 7.2.2.1”
In 12.12, replace the paragraph below “Replacement:” with:
“Enclosures for hollow walls classified according to 7.2.2.1 shall provide suitable means for fixing the
enclosure to hollow walls.”
At the end of 12.12, add:
“12.13 Boxes and enclosures classified according to 7.2.2.2 and 7.2.2.3
Replacement:
void.”
3
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SIST EN 60670-24:2013/oprAA:2021
EN 60670-24:2013/prAA:2021 (E)
6 Modification to Clause 15, “Mechanical strength”
In 15.101, add at the end:
“After the test, the specimens shall show no damage leading to non-compliance with the standard.
Damage to the finish, small dents and small chips which do not adversely affect the protection against
electric shock or harmful ingress of water are disregarded.
Cracks passing through the material not visible with normal or corrected vision without magnification,
surface cracks in fibre-reinforced mouldings and small indentations are disregarded.”
7 Modification to Clause 16, “Resistance to heat”
Replace the text of Clause 16 with:
“This clause of Part 1 is applicable with following modification:
Deletion of 16.3 "Boxes and enclosures of insulation materials classified according to 7.2.2 or
7.2.2.3" ”
8 Modification to Clause 18, “Resistance of insulating material to abnormal
heat and to fire”
Replace the text of Clause 18 with:
“This clause of Part 1 is applicable with the following modifications:
Replacement of the bullet points by the following:
— By test made at 960 °C
— for parts of insulating material necessary to retain current-carrying parts in position.
— By the test made at 850 °C
— for parts of insulating material, necessary to retain parts of the earthing circuit in position
(with the exception of parts of insulating material needed to retain the earth terminal in
position in an enclosure), and
— for parts of insulating material of boxes and enclosures classified according to 7.2.2.1, with
the exception of parts protruding from the wall and additional and/or removable internal parts
of enclosure (eg. separator) not necessary to retain current carrying parts in position.
— By the test made at 650 °C
— for parts of insulating material not necessary to retain current-carrying parts in position (even
though they are in contact with them), and
— for parts of insulating material retaining earthing terminal in position.
— for parts of insulating material of boxes and enclosures classified according to 7.2.2.1,
protruding from the wall and additional and/or removable internal parts of enclosure (eg.
separator) not necessary to retain current carrying parts in position.
NOTE Accessories complying with other standards, e.g. connecting devices incorporated but not integrated into
the enclosure, are not considered as part of the enclosures.”
4
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SIST EN 60670-24:2013/oprAA:2021
EN 60670-24:2013/prAA:2021 (E)
9 Modifications to Clause 101, “Verification of the maximum capability to
dissipate power (P )”
de
th th th
Replace the 10 , 11 and 12 sentence with:
“For enclosures according to 7.2.1.1 and 7.2.2.1 the test is carried out with the specimen mounted as
declared by the manufacturer.
For enclosures according to 7.2.3 the specimen is mounted on a minimum 19 mm thick plywood
painted black.
For enclosures according to 7.2.1.2 and 7.2.1.3the test is carried out with the specimen cast in a
concrete wall of thickness not less than 100 mm on each surface; it is allowed to cast the specimen in
walls of different material, with equivalent thermal conductivity.”
10 Modifications to Clause 102, “Verification of temperature rise”
th th th
Replace the 7 , 8 and 9 sentence with:
“For enclosures according to 7.2.1.1 and 7.2.2.1 the test is carried out with the specimen mounted as
declared by the manufacturer.
For enclosures according to 7.2.3.1 the test is carried out with the specimen cast in a concrete wall of
thickness not less than 100 mm on each surface; it is allowed to cast the specimen in walls of different
material, with equivalent thermal conductivity.
For enclosures according to 7.2.3 the specimen is mounted on a minimum 19 mm thick plywood
painted black.”
In the Keys to Figures 103 and 104, add the following additional line:
“= the resistor is placed at equal distance from both sides with a tolerance on the difference of
±5 mm.”
11 Addition of Clause Z1, "Electromagnetic fields (EMF) requirements"
Add the following clause Z1:
"Z1 Electromagnetic fields (EMF) requirements
This clause of Part 1 is applicable."
12 Modifications to Annex AA, “Instructions to be given by the manufacturer
of the GP enclosure to the installer how to integrate accessories, and
example of calculation”
In AA.1, replace the second equation with:
“ P = P + 0,2 P + P + P + 0,2 P “
tot dp dp au el el
and in the term definition for this equation, add:
“
P is the power loss of electronic accessories, in watt, taking into account the utilization factor
el
(K ) for multi way devices
e
0,2 P is the increase of P to consider power lost by connections of the power circuit of
el el
electronic devices”
Replace the title of AA.3 as follows:
“AA.3 Example of calculation without electronic devices”
5
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SIST EN 60670-24:2013/oprAA:2021
EN 60670-24:2013/prAA:2021 (E)
Add the following subclause AA.5:
“
AA.5 Example of calculation to take into account the power loss of electronic devices
AA.5.1 General
The calculation is based on the following steps:
6
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SIST EN 60670-24:2013/oprAA:2021
EN 60670-24:2013/prAA:2021 (E)
AA.5.2 Diagram of the equipped GP enclosure
Figure AA.1 — Diagram of the equipped GP enclosure
AA.5.3 Calculation of the power loss within the equipped GP enclosure
Determination of the utilisation factor (K ) and of the diversity factor (K)
e
— Level 0 incoming circuit - K = 0,85
e
7
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SIST EN 60670-24:2013/oprAA:2021
EN 60670-24:2013/prAA:2021 (E)
— Level 1 circuits
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