Signalling on low voltage electrical installations in the frequency range 3 kHz to 148,5 kHz Part 4-2: Low voltage decoupling filters - Safety requirements

This product safety standard applies to decoupling filters in a mains communication system intended for utility networks or household and similar fixed-electrical installations including residential, commercial and light industrial buildings.

Signalübertragung auf elektrischen Niederspannungsnetzen im Frequenzbereich 3 kHz bis 148,5 kHzTeil 4-2: Niederspannungs-Entkopplungsfilter - Sicherheitsanforderungen

Transmission de signaux sur les réseaux électriques basse tension dans la bande de fréquences de 3 kHz à 148,5 kHz - Partie 4-2: Filtres de découplage basse tension - Exigences de sécurité

Signalizacija po nizkonapetostnih električnih napeljavah v frekvenčnem območju od 3 kHz do 148,5 kHz - 4-2. del: Nizkonapetostni ločilni filtri - Varnostne zahteve

General Information

Status
Not Published
Current Stage

RELATIONS

Buy Standard

Draft
prEN 50065-4-2:2021
English language
27 pages
sale 10% off
Preview
sale 10% off
Preview
e-Library read for
1 day

Standards Content (sample)

SLOVENSKI STANDARD
oSIST prEN 50065-4-2:2021
01-julij-2021
Signalizacija po nizkonapetostnih električnih napeljavah v frekvenčnem območju

od 3 kHz do 148,5 kHz - 4-2. del: Nizkonapetostni ločilni filtri - Varnostne zahteve

Signalling on low voltage electrical installations in the frequency range 3 kHz to 148,5

kHz Part 4-2: Low voltage decoupling filters - Safety requirements

Signalübertragung auf elektrischen Niederspannungsnetzen im Frequenzbereich 3 kHz

bis 148,5 kHzTeil 4-2: Niederspannungs-Entkopplungsfilter - Sicherheitsanforderungen

Transmission de signaux sur les réseaux électriques basse tension dans la bande de

fréquences de 3 kHz à 148,5 kHz - Partie 4-2: Filtres de découplage basse tension -

Exigences de sécurité
Ta slovenski standard je istoveten z: prEN 50065-4-2
ICS:
31.160 Električni filtri Electric filters
33.040.30 Komutacijski in signalizacijski Switching and signalling
sistem systems
oSIST prEN 50065-4-2:2021 en,fr

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
oSIST prEN 50065-4-2:2021
---------------------- Page: 2 ----------------------
oSIST prEN 50065-4-2:2021
EUROPEAN STANDARD DRAFT
prEN 50065-4-2
NORME EUROPÉENNE
EUROPÄISCHE NORM
April 2021
ICS Will supersede EN 50065-4-2:2001 and all of its
amendments and corrigenda (if any)
English Version
Signalling on low voltage electrical installations in the frequency
range 3 kHz to 148,5 kHz Part 4-2: Low voltage decoupling
filters - Safety requirements

Transmission de signaux sur les réseaux électriques basse Signalübertragung auf elektrischen Niederspannungsnetzen

tension dans la bande de fréquences de 3 kHz à 148,5 kHz im Frequenzbereich 3 kHz bis 148,5 kHzTeil 4-2:

- Partie 4-2: Filtres de découplage basse tension - Niederspannungs-Entkopplungsfilter -

Exigences de sécurité Sicherheitsanforderungen
This draft European Standard is submitted to CENELEC members for enquiry.
Deadline for CENELEC: 2021-07-16.
It has been drawn up by CLC/TC 219.

If this draft becomes a European Standard, CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which

stipulate the conditions for giving this European Standard the status of a national standard without any alteration.

This draft European Standard 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: 69658 Ref. No. prEN 50065-4-2 E
---------------------- Page: 3 ----------------------
oSIST prEN 50065-4-2:2021
prEN 50065-4-2:2021 (E)
Contents

European foreword ................................................................................................................................. 3

1 Scope ............................................................................................................................................. 4

2 Normative references ................................................................................................................... 4

3 Terms and definitions .................................................................................................................. 5

4 General requirements ................................................................................................................... 6

5 General notes on tests ................................................................................................................. 6

6 Rating ............................................................................................................................................. 6

7 Classification ................................................................................................................................ 7

8 Marking .......................................................................................................................................... 8

9 Dimensions.................................................................................................................................... 9

10 Protection against electric shock .............................................................................................10

11 Provision for protective earthing ..............................................................................................10

12 Terminals .....................................................................................................................................10

13 Construction ...............................................................................................................................11

14 Resistance to ageing, to harmful ingress of water and to humidity .....................................13

15 Insulation resistance and dielectric strength ..........................................................................13

16 Temperature rise .........................................................................................................................15

17 Mechanical strength ...................................................................................................................15

18 Resistance to heat ......................................................................................................................16

19 Screws, current-carrying parts and connections ....................................................................16

20 Creepage distances, clearances and distances through sealing compound ......................18

21 Resistance to abnormal heat, to fire and to tracking ..............................................................21

22 Resistance to rusting .................................................................................................................22

23 Components ................................................................................................................................22

24 Abnormal conditions ..................................................................................................................23

25 Protection against short-circuit ................................................................................................25

26 Resistance to transients ............................................................................................................25

Annex ZZ (informative) Relationship between this European standard and the safety objectives of

Directive 2014/35/EU [2014 OJ L96] aimed to be covered ................................................................26

Bibliography ..........................................................................................................................................27

---------------------- Page: 4 ----------------------
oSIST prEN 50065-4-2:2021
prEN 50065-4-2:2021 (E)
European foreword

This document (prEN 50065-4-2:2021) has been prepared by WG 12 “Filters” of CLC/TC 205A “Mains

communicating systems”.
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 will supersede EN 50065-4-2:2001 and all of its amendments and corrigenda (if any).

This document has been prepared under a mandate given to CENELEC by the European Commission

and the European Free Trade Association, and supports essential requirements of EU Directive(s).

For the relationship with EU Directive(s) see informative Annex ZZ, which is an integral part of this

document.

EN 50065 consists of the following parts, under the general title: Signalling on low-voltage electrical

installations in the frequency range 3 kHz to 148,5 kHz
Part 1: General requirements, frequency bands and electromagnetic disturbances

Part 2-1: Immunity requirements for mains communications equipment and systems operating in the

range of frequencies 95 kHz to 148,5 kHz and intended for use in residential, commercial and light

industrial environments

Part 2-2: Immunity requirements for mains communications equipment and systems operating in the

range of frequencies 95 kHz to 148,5 kHz and intended for use in industrial environments

Part 2-3: Immunity requirements for mains communications equipment and systems operating in the

range of frequencies 3 kHz to 95 kHz and intended for use by electricity suppliers and distributors

Part 4-1: Low voltage decoupling filters – Generic specification
Part 4-2: Low voltage decoupling filters – Safety requirements
Part 4-3: Low voltage decoupling filters – Incoming filter
Part 4-4: Low voltage decoupling filters – Impedance filter
Part 4-5: Low voltage decoupling filters – Segmentation filter
Part 4-6: Low voltage decoupling filters – Phase coupler
Part 4-7: Portable low voltage decoupling filters – Safety requirements
Part 7: Equipment impedance
---------------------- Page: 5 ----------------------
oSIST prEN 50065-4-2:2021
prEN 50065-4-2:2021 (E)
1 Scope

This document applies to decoupling filters in a low voltage mains communication system intended for

utility networks or household and similar fixed-electrical installations including residential, commercial and

light industrial buildings.
2 Normative references

The following documents are referred to in the text in such a way that some or all of their content

constitutes requirements of this document. For dated references, only the edition cited applies. For

undated references, the latest edition of the referenced document (including any amendments) applies.

HD 214 S2, Method for determining the comparative and the proof tracking indices of solid insulating

materials under moist conditions (IEC 60112)

HD 625.1, Insulation coordination for equipment within low-voltage systems - Part 1: Principles,

requirements and tests (IEC 60664-1)

EN 50065-4-1, Signalling on low-voltage electrical installations in the frequency range 3 kHz to 148,5 kHz

- Part 4-1: Low voltage decoupling filters - Generic specification

EN 60065, Audio, video and similar electronic apparatus - Safety requirements (IEC 60065)

EN 60068-2-30, Environmental testing - Part 2-30: Tests - Test Db: Damp heat, cyclic (12 h + 12 h cycle)

(IEC 60068-2-30)

EN 60068-2-75, Environmental testing - Part 2-75: Tests - Test Eh: Hammer tests (IEC 60068-2-75)

EN 60068-2-78, Environmental testing - Part 2-78: Tests - Test Cab: Damp heat, steady state

(IEC 60068-2-78)
EN 60127 (series), Miniature fuses (IEC 60127 series)
EN 60529, Degrees of protection provided by enclosures (IP Code) (IEC 60529)

EN 60695-2-1/X:1996, Fire hazard testing - Part 2: Test methods (IEC 60695-2-1/X:1994)

EN 60695-10-2, Fire hazard testing - Part 10-2: Abnormal heat - Ball pressure test method

(IEC 60695-10-2)

EN 60721-3-3, Classification of environmental conditions - Part 3: Classification of groups of

environmental parameters and their severities - Section 3: Stationary use at weatherprotected locations

(IEC 60721-3-3)

EN 60947-1:2007, Low-voltage switchgear and controlgear - Part 1: General rules (IEC 60947-1:2007)

EN 60999-1:2000, Connecting devices - Electrical copper conductors - Safety requirements for screw-

type and screwless-type clamping units - Part 1: General requirements and particular requirements for

2 2

clamping units for conductors from 0,2 mm up to 35 mm (included) (IEC 60999-1:1999)

EN 61000-4-4, Electromagnetic compatibility (EMC) - Part 4-4: Testing and measurement techniques -

Electrical fast transient/burst immunity test (IEC 61000-4-4)

EN 132400, Sectional Specification: Fixed capacitors for electromagnetic interference suppression and

connection to the supply mains (Assessment level D)
---------------------- Page: 6 ----------------------
oSIST prEN 50065-4-2:2021
prEN 50065-4-2:2021 (E)

IEC 60999-2, Connecting devices - Electrical copper conductors - Safety requirements for screw-type and

screwless-type clamping units - Part 2: Particular requirements for clamping units for conductors above

35 mm2 up to 300 mm2 (included)

ISO 1456, Metallic and other inorganic coatings — Electrodeposited coatings of nickel, nickel plus

chromium, copper plus nickel and of copper plus nickel plus chromium

ISO 2081, Metallic and other inorganic coatings — Electroplated coatings of zinc with supplementary

treatments on iron or steel
ISO 2093, Electroplated coatings of tin — Specification and test methods
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

— ISO Online browsing platform: available at https://www.iso.org/obp
— IEC Electropedia: available at http://www.electropedia.org/

NOTE Where the term’s voltage and current are used, they imply r.m.s. values, unless otherwise specified.

3.1
decoupling filter

device installed in an electrical network or installation in order to make possible reliable data transmission

over the low voltage mains network
3.2
phase coupler

type of decoupling filter which transmits a signal within a specified frequency range from one phase to

another in a multi-phase installation
3.3
fault condition
abnormal condition which could occur during normal operation
3.4
enclosed equipment
equipment which is mounted and/or applied without an additional enclosure
3.5
unenclosed equipment

equipment intended to be built into an enclosure which completely covers the equipment

3.6
partly enclosed equipment

equipment intended to be built into an appropriate enclosure which only covers the unenclosed part of the

equipment

Note 1 to entry: Flush-mounted equipment intended to be located in a box is an example of such equipment.

3.7
terminal

conductive part of one pole, composed of one or more clamping unit(s) and insulation if necessary

---------------------- Page: 7 ----------------------
oSIST prEN 50065-4-2:2021
prEN 50065-4-2:2021 (E)
3.8
screw-type terminal

clamping unit for the connection and subsequent disconnection of one conductor or the interconnection

and subsequent disconnection of two or more conductors, the connection being made, directly or

indirectly, by means of screws or nuts of any kind
3.9
screwless-type terminal

clamping unit for the connection and subsequent disconnection of one conductor or the interconnection

and subsequent disconnection of two or more conductors, the connection being made, directly or

indirectly, by means other than screws
3.10
nominal voltage
voltage assigned to the equipment by the manufacturer
3.11
nominal current
nominal maximum operating current assigned to the equipment by the manufacturer
3.12
conditional short-circuit current

value of the AC component of a prospective current, which the equipment protected by a suitable short-

circuit protective device (hereafter referred to as SCPD) in series can withstand under specified

conditions of use and behaviour
4 General requirements

Equipment and its enclosures shall be so designed and constructed that, in normal use, their

performance is reliable and without danger to the user or the surroundings.

In general, compliance is checked by carrying out all the tests specified, where applicable.

5 General notes on tests
5.1 General
Tests according to this document are type tests.

5.2 The samples are tested as delivered and under normal conditions of use, having regard to the

classification of the equipment and to the manufacturer's installation instructions.

5.3 Unless otherwise specified, the tests are carried out in the order of the clauses at an ambient

temperature of 20 °C ± 5 °C.
5.4 The required number of samples shall be 9.

Three samples are subjected to all the relevant tests, except the test of Clauses 23 and 24 where three

other samples are used, and the tests of Clauses 25 and 26 where another three samples are used.

5.5 Equipment is deemed not to comply with this document if any sample does not pass any of the

listed tests.
6 Rating
6.1 Standard values of nominal voltages are AC 230 V and AC 400 V.
---------------------- Page: 8 ----------------------
oSIST prEN 50065-4-2:2021
prEN 50065-4-2:2021 (E)

If a different nominal voltage is applied this value shall not be less than 220 V.

6.2 Standard values of nominal currents are 10 A, 16 A, 20 A, 25 A, 32 A, 40 A, 50 A, 63 A, 80 A, 90A,

100 A and 125 A.
2 2 2 2 2

6.3 Standard cross-sectional areas of conductors are 1,5 mm , 2,5 mm , 4 mm , 6 mm , 10 mm ,

2 2 2 2
16 mm , 25 mm , 35 mm and 50 mm

Compliance with the requirements of 6.1 to 6.3 is checked by inspection of the marking.

7 Classification
7.1 Equipment is classified as follows:
7.1.1 According to protection against direct contact and external influences:
— enclosed equipment (minimum IP2X) for separate mounting;
— unenclosed equipment for mounting in an adequate enclosure.
NOTE 1 The degrees of protection are based on EN 60529.

NOTE 2 For unenclosed equipment, the protection against electric shock is given by the enclosure in which the

equipment is intended to be mounted. For enclosed equipment, the protection against electric shock is provided by

compliance with the requirements of Clause 10.
7.1.2 According to the degree of protection against ingress of water:
The degrees of protection are based on EN 60529.
7.1.3 According to the method of mounting
— surface-type equipment;
— flush-type equipment;
— panel board equipment.
7.1.4 According to environmental temperature conditions
The classifications are based on EN 60721-3-3.
— class 3K4 + 5 °C to + 40 °C for indoor locations
— class 3K5 - 5 °C to + 45 °C for unprotected indoor locations
— class 3K6 - 25 °C to + 55 °C for outdoor locations
— class 3K8H - 25 °C to + 70 °C for severe environments
7.1.5 According to the rated impulse withstand voltage
The rated impulse withstand voltages are based on HD 625.1.
— 4000 V according to overvoltage category III;
— 6000 V according to overvoltage category IV.
---------------------- Page: 9 ----------------------
oSIST prEN 50065-4-2:2021
prEN 50065-4-2:2021 (E)
8 Marking
8.1 As a minimum the equipment shall be marked with:
a) nominal voltage(s) in volts ~;
b) nominal current in amperes;

c) manufacturer's or responsible vendor's name, trade mark or identification mark;

d) type of decoupling filter and reference or catalogue number;
e) symbol for temperature range, if different from class 3K4;
f) symbol for degree of protection;
g) symbol for degree of protection against ingress of water;

h) marking with conditional short-circuit current and suitable SCPD shall be given in the manufacturer’s

catalogues.
8.2 Symbols for marking shall be used as follows:
Amperes A
Volt V
Alternating current ~
Degree of protection against moisture IPX4 or IPX5
The letter “X” shall be replaced by the relevant number.

The figure for the current rating shall be placed before or above that for the nominal voltage and

separated from the latter by an oblique line or a dash.

NOTE The marking for current, voltage and nature of supply can be, for instance, as follows: 16 A 230 V~or

16/230~.

8.3 The manufacturer's or responsible vendor's name, trademark or identification mark, type reference

and nominal current shall be on the main part of the equipment.

Parts such as cover plates, which are necessary for safety purposes and are intended to be sold

separately, shall be marked with the manufacturer's or responsible vendor's name, trade mark or

identification mark and type reference.

The symbol for degree of protection, if applicable, shall be marked on the outside of its associated

enclosure so as to be easily discernible when the equipment is mounted and wired as in normal use.

Additional type references may be marked on the main part, or on the outside or the inside of the

associated enclosure.

NOTE The term “main” part means the part carrying the terminals and any part integral with them; it does not

include parts intended to be sold separately.
8.4 Terminals

The side name (Input side, output side) and the respective termination shall be marked, when

appropriate, in such a way that they are clearly distinguished (e.g. using a different colour for each side).

These indications shall not be placed on screws or any other easily removable parts.

NOTE “Easily removable parts” are those parts, which can be removed during the normal installation of the

equipment.
---------------------- Page: 10 ----------------------
oSIST prEN 50065-4-2:2021
prEN 50065-4-2:2021 (E)
For example a typical marking scheme is given in Table 1.
Table 1 — Symbols for identification of the termination
Single phase Three phase
Point of connection Identification Point of connection Identification
Line L 1st Phase L1,
2nd Phase L2,
3rd Phase L3
Neutral N Neutral N
Earth EN 60417 series Earth EN 60417 series
Symbols 5019 Symbols 5019

Terminals associated with any one pole shall have similar identification differing from that of the terminals

associated with the other poles, unless the relationship is self-evident.

8.5 Terminals shall additionally be marked in accordance with EN 60999-1:2000, 7.4.

Compliance is checked by inspection.
8.6 Marking shall be durable and easily legible.
Compliance is checked by inspection and by the following test.

The test is made by rubbing the marking by hand for 15 s with a piece of cloth soaked with water and

again for 15 s with a piece of cloth soaked with petroleum spirit.

Marking made by impression, moulding, pressing or engraving is not subjected to this test.

The petroleum spirit used should consist of a solvent hexane with a content of aromatics of maximum

0,1 % by volume, a value of 29 % for kauri-butanol, an initial boiling-point of approximately 65 °C, a dry-

point of approximately 69 °C and a density of approximately 0,68 g/cm .

The type reference may be marked with paint or ink, protected, if necessary, by vanish.

8.7 The correct installation and use of the equipment shall be indicated in an installation instruction

delivered with the equipment. A phase coupler shall be delivered with a marking plate with the following

text:
Phase Coupler !
Must be disconnected while working on the installation.

The marking plate shall be fastened to the panel board in which the phase coupler is installed.

The installation instruction and the text of the marking plate shall be written in the official language(s) of

the country in which the equipment is to be sold.
Compliance is checked by inspection.
NOTE In the following country the marking plate is not necessary: Germany.
9 Dimensions
Equipment shall comply with the appropriate standard sheets.
Compliance is checked by inspection and by measurement.
---------------------- Page: 11 ----------------------
oSIST prEN 50065-4-2:2021
prEN 50065-4-2:2021 (E)
10 Protection against electric shock

10.1 The test is carried out according to EN 60529, with the degree of protection IP2X.

During the test, live parts of the equipment shall not be accessible to the test finger.

11 Provision for protective earthing

11.1 Earthing terminals shall be terminals with screw clamping or with other means of comparable

effectiveness and shall comply with the appropriate requirements of Clause 12.

They shall be of the same size as the corresponding terminals for the supply conductors except that any

additional external earthing terminal shall be of a size suitable for conductors of at least 6 mm .

11.2 Decoupling filters having more than one cable inlet shall be provided with an internal earthing

terminal allowing the connection of an incoming and outgoing conductor for the continuity of the earthing

circuit.

Compliance with the requirements of 11.1and 11.2 are checked by inspection and the tests of Clause 12

11.3 The connection between the earthing terminal and accessible metal parts to be connected thereto

shall be of low resistance.
Compliance is checked by the following test:

A current derived from a.c. source having a no-load voltage not exceeding 12 V and equal to 1,5 times

rated current or 25 A, whichever is greater, is passed between the earthing terminal and each of the

accessible metal parts in turn

The voltage drop between the earthing terminal and the accessible metal part is measured, and the

resistance calculated from the current and this voltage drop.
In no case the resistance shall exceed 0,05 Ω.
12 Terminals
12.1 Introduction

The requirements in 12.2 and 12.3 are only for clamping units connected to power circuits.

12.2 General

12.2.1 Equipment shall be provided with terminals having screw-type or screwless-type clamping units.

12.2.2 Clamping units shall allow the conductor to be connected without special preparation.

12.2.3 The means for clamping the conductors in the clamping units shall not serve to fix any other

component, although they may hold the clamping units in place or prevent them from turning.

Compliance is checked by inspection and by the test of 12.3 as applicable.

12.3 Screw-type and screwless-type clamping units with clamping for external copper

conductors

12.3.1 Screw-type and screwless-type clamping units shall comply with EN 60999-1 or IEC 60999-2.

All the tests shall be with the clamping units mounted in the equipment.

The clamping units shall be tested with the cross-sectional area of conductors given in Table 2.

---------------------- Page: 12 ----------------------
oSIST prEN 50065-4-2:2021
prEN 50065-4-2:2021 (E)
Table 2 — Connectable cross-sections of copper conductors
Ranges of nominal current In Type of conductor and cross-sectional area
(A) (mm )
Rigid Flexible
(solid or stranded)
In ≤ 10 1 to 2,5 1 to 1,5
10 < In ≤ 16 1,5 to 4 1 to 2,5
16 < In ≤ 25 2,5 to 6 1,5 to 4
25 < In ≤ 32 4 to 10 2,5 to 6
32 < In ≤ 40 6 to 16 -
40 < In ≤ 63 10 to 25 -
63 < In ≤ 80 16 to 35 -
80 < In ≤ 125 25 to 50 -

In addition to EN 60999-1:2000, 9.5 and 9.6: “During the test the clamping units shall not work loose from

their fixings to the equipment.”
EN 60999-1:2000, 8.16 and 9.9 are not applicable.
The test current in EN 60999-1:2000, 9.10 shall be according to Table 3.
Table 3 — Test current
Cross-sectional area of rigid Nominal current Test current
conductors
(A) (A)
(mm )
1,5 10–13 15
2,5 16 20
2,5 20 25
4 25 31,25
6 32 40
10 40 50
10 50 62,5
16 63 78,75
25 80 100
35 100 125
50 125 156

NOTE The test currents for equipment having other nominal currents are determined by interpolation between

the next lower and higher ratings.
13 Construction

13.1 Insulating linings and barriers shall have adequate mechanical strength and shall be secured in a

reliable manner.
---------------------- Page: 13 ----------------------
oSIST prEN 50065-4-2:2021
prEN 50065-4-2:2021 (E)
Compliance is checked by inspection after the tests of Clause 17.
13.2 Equipment shall be constructed so as to permit:
— easy introduction and connection of the conductors in to the terminals;
— correct positioning of the conductors;
— easy fixing of the equipment;

— equipment intended for walls or boxes shall have adequate space between the underside of the base

and the enclosure (cover or box) so that, after installation of the equipment, the insulation of the

conductors is not pressed against live parts of different polarity.

Surface-type equipment shall be constructed so that the fixing means do not damage the insulation of the

cables during the installation.

NOTE 1 This requirement does not imply that the metal parts of the terminals are necessarily protected by

insulation barriers or insulating shoulders, to avoid contact, due to incorrect installation of the terminal metal parts,

with the insulation of the conductor.

NOTE 2 For surface-type equipment, mounted on a mounting plate, a wiring channel could be needed to comply

with this requirement.

Compliance is checked by inspection and by an installation test using conductors of the largest cross-

sectional area specified in Table 2 - Connectable cross-sections of copper
...

Questions, Comments and Discussion

Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.