SIST EN 50483-5:2026

Test requirements for low voltage aerial bundled cable accessories - Part 5: Electrical ageing test

The EN 50483 series applies to overhead line fittings for tensioning, supporting and connecting aerial bundled cables (ABC) of rated voltage U0/U (Um): 0,6/1 (1,2) kV.
This document applies to the connections described in EN 50483-4, including branch connectors, Insulation Piercing Connectors (IPC), pre-insulated lugs (terminals) and through pre-insulated connectors (sleeves).
Two classes of connectors are covered by this document:
-   Class A: These are connectors intended for electricity distribution or industrial networks in which they can be subjected to short-circuits of relatively high intensity and duration. As a consequence, Class A connectors will be suitable for the majority of applications.
-   Class B: These are connectors for networks in which overloads or short-circuits are rapidly cleared by the operation of protection devices.
Depending on their application, the connectors are subjected to heat cycles and short-circuit current tests.
Class A: the connectors are subjected to heat cycles and short-circuit current tests.
Class B: the connectors are subjected to heat cycles only.
The object of this document is to define the heating cycles test methods and requirements which apply to compression through connectors, insulation piercing connectors and all other type of connections for low voltage aerial bundled cables.

Prüfanforderungen für Bauteile für isolierte Niederspannungsfreileitungen - Teil 5: Elektrische Alterungsprüfungen

Prescriptions relatives aux essais des accessoires pour réseaux aériens basse tension torsadés - Partie 5: Essai de vieillissement électrique

Zahteve za preskušanje pribora za nizkonapetostne izolirane nadzemne kable - 5. del: Preskus električnega staranja

Serija EN 50483 se nanaša na opremo za nadzemne vodnike za napenjanje, podporo in povezovanje zračnih snopov kablov (ABC) z nazivno napetostjo U0/U (Um): 0,6/1 (1,2) kV.
Ta dokument se uporablja za povezave, opisane v EN 50483-4, vključno z odcepnimi konektorji, izolacijskimi prebojnimi konektorji (IPC), predizoliranimi čepi (terminali) in skozi predizolirane konektorje (rokavi).
Ta dokument zajema dva razreda konektorjev:
- Razred A: To so konektorji namenjeni distribucijskim ali industrijskim omrežjem, v katerih so lahko izpostavljeni kratkostičnim tokovom z relativno visoko intenzivnostjo in trajanjem. Posledično bodo konektorji razreda A primerni za večino aplikacij.
- Razred B: To so konektorji za omrežja, v katerih se preobremenitve ali kratki stiki hitro odpravijo z delovanjem zaščitnih naprav.
Glede na njihovo uporabo so konektorji podvrženi toplotnim ciklom in preskusom kratkostičnega toka.
Razred A: konektorji so podvrženi toplotnim ciklom in preskusom kratkostičnega toka.
Razred B: konektorji so podvrženi samo toplotnim ciklom.
Namen tega dokumenta je opredeliti metode preskušanja toplotnih ciklov in zahteve, ki se uporabljajo za kompresijske skozi konektorje, izolacijske prebojne konektorje in vse druge vrste povezav za nizkonapetostne zračne snopove kablov.

General Information

• Status: Published
• Public Enquiry End Date: 31-Dec-2024
• Publication Date: 16-Apr-2026
• ICS: 29.240.20 - Power transmission and distribution lines
• Technical Committee: IEKA - Electric cables
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 09-Apr-2026
• Due Date: 14-Jun-2026
• Completion Date: 17-Apr-2026
• Ref Project: EN 50483-5:2026 - Test requirements for low voltage aerial bundled cable accessories - Part 5: Electrical ageing test

Relations

• Replaces: SIST EN 50483-5:2009 - Test requirements for low voltage aerial bundled cable accessories -- Part 5: Electrical ageing test
• Effective Date: 01-Jun-2026

Overview

The standard kSIST FprEN 50483-5:2025, developed by CLC, specifies the test requirements for electrical ageing of low voltage aerial bundled cable (ABC) accessories. It forms Part 5 of the EN 50483 series, which governs test protocols for overhead line fittings used with ABC rated at voltages of 0.6/1 (1.2) kV. These fittings include branch connectors, insulation piercing connectors (IPC), pre-insulated lugs, and pre-insulated through connectors (sleeves).

This standard introduces rigorous heat cycle and electrical ageing test methods to simulate operational stresses and ensure that connectors maintain integrity and performance during their service life. Two classes of connectors are defined depending on network application and short-circuit exposure:

• Class A: For networks exposed to high-intensity and duration short-circuits; connectors undergo both heat cycling and short-circuit current tests.
• Class B: For networks with quickly cleared overloads; connectors undergo heat cycling tests only.

Key Topics

• Scope and Applicability: Applies specifically to connectors covered under EN 50483-4 used in low voltage aerial bundled cable systems.

• Test Methods: Includes 1,000 heating and cooling cycles to evaluate electrical ageing. Cold resistance measurements are taken at defined intervals to track connector degradation.

• Test Setup: Detailed test arrangements for different connector types address equal and unequal cross-sectional conductors, utilizing test loops with equalizers to ensure uniform current distribution.

• Short-Circuit Tests: Class A connectors are evaluated with alternating current short-circuits simulating real fault conditions.

• Optional Environmental Conditioning: The standard allows for immersion testing under saline conditions per Part 6 of the EN 50483 series to assess performance in polluted environments.

• Definitions and Terminology: Establishes clear terms such as adiabatic, aerial bundled cable, branch conductor, median connector, and shear head ensuring consistency within electrotechnical contexts.

• Measurement Techniques: Specifies voltage, temperature, and resistance measurement methods using thermocouples and precise instrumentation to assess connector conditions through the test cycles.

Applications

This standard is critical for manufacturers, suppliers, and testing laboratories involved in the design, validation, and certification of low voltage overhead ABC connectors. Its practical applications include:

• Electrical Utilities: Ensures that distribution network ABC accessories meet durability and safety standards under thermal and mechanical stresses.
• Industrial Power Networks: Validates connector reliability in industrial settings where short-circuit conditions may be more severe.
• Product Development: Guides the design of connectors to withstand aging and thermal cycling, improving longevity and reducing maintenance costs.
• Conformity Assessment: Provides a benchmark for type testing needed to demonstrate compliance with European and national safety regulations.
• Environmental Suitability Testing: By integrating optional immersion tests, accessories can be certified for use in saline or polluted atmospheres common in coastal or industrial areas.

Related Standards

The kSIST FprEN 50483-5:2025 is part of a comprehensive series targeting ABC accessories and references several key normative documents including:

• EN 50483-1:2024 - Generalities and foundational testing requirements for low voltage ABC accessories.
• EN 50483-4 - Specific standards for connectors, to which ageing tests apply.
• EN 50483-6:2024 - Environmental testing, such as immersion tests in saline conditions.
• IEC 61238-1-2:2018 - Test methods for compression and insulation piercing connectors for power cables rated up to 1 kV.
• IEC 60050-461 - International electrotechnical vocabulary pertaining to electric cables and related terms.

By aligning with these interconnected standards, kSIST FprEN 50483-5:2025 ensures a harmonized approach to testing and certification, enhancing safety, durability, and interoperability of aerial bundled cable systems in Europe and beyond.

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Keywords: low voltage aerial bundled cable, ABC accessories, electrical ageing test, heat cycle test, insulation piercing connector, branch connectors, pre-insulated lugs, short-circuit current test, overhead line fittings, cable accessories testing, electrical connector durability, EN 50483 series, CLC standard, electrical distribution network.

Standards Content (Sample)

SLOVENSKI STANDARD
01-junij-2026
Nadomešča:
SIST EN 50483-5:2009
Zahteve za preskušanje pribora za nizkonapetostne izolirane nadzemne kable - 5.
del: Preskus električnega staranja
Test requirements for low voltage aerial bundled cable accessories - Part 5: Electrical
ageing test
Prüfanforderungen für Bauteile für isolierte Niederspannungsfreileitungen - Teil 5:
Elektrische Alterungsprüfungen
Prescriptions relatives aux essais des accessoires pour réseaux aériens basse tension
torsadés - Partie 5: Essai de vieillissement électrique
Ta slovenski standard je istoveten z: EN 50483-5:2026
ICS:
29.240.20 Daljnovodi Power transmission and
distribution lines
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN 50483-5
NORME EUROPÉENNE
EUROPÄISCHE NORM April 2026
ICS 29.240.20 Supersedes EN 50483-5:2009
English Version
Test requirements for low voltage aerial bundled cable
accessories - Part 5: Electrical ageing test
Prescriptions relatives aux essais des accessoires pour Prüfanforderungen für Bauteile für isolierte
réseaux aériens basse tension torsadés - Partie 5: Essai de Niederspannungsfreileitungen - Teil 5: Elektrische
vieillissement électrique Alterungsprüfungen
This European Standard was approved by CENELEC on 2026-03-09. 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.
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 European Standard 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
© 2026 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN 50483-5:2026 E
Contents Page
European foreword . 4
Introduction . 5
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
4 Symbols . 9
5 Type test . 10
5.1 Principle . 10
5.2 Test arrangement . 10
5.3 Test specimen . 12
5.4 Measurement . 14
5.5 Heat cycle . 15
5.6 Requirements . 19
Annex A (normative) Equalizers. 28
A.1 General . 28
A.2 Copper conductors . 28
A.3 Stranded aluminium conductors (Figure A.1) . 28
A.4 Dimensions. 29
Annex B (informative) Recommendations to improve accuracy of measurement . 30
B.1 Handling the test loop . 30
B.2 Measurements, instruments and readings . 30
Bibliography . 31
Figures
Figure 1 — Lengths and configurations of conducting paths . 12
Figure 2 — Location of thermocouple in an IPC . 14
Figure 3 — Location of thermocouple in a through connector . 14
Figure 4 — Location of thermocouple on the reference cable . 15
Figure 5 — Example of second heat cycle profile . 17
Figure 6 — Use of a concentric return conductor . 18
Figure 7 — Test loop for branch connectors with main and branch conductors having equal
cross-sections and linear resistances . 23
Figure 8 — Test loop for branch connectors with main and branch conductors having unequal
cross-sections and linear resistances . 24
Figure 9 — Test loop for through connectors with conductors having equal or unequal cross-
sections and linear resistances . 25
Figure 10 — Test loop for pre-insulated lugs . 26
Figure 11 — Test loop for pre-insulated lugs – Lug connection detail . 27
Figure A.1 — Equalizers . 29
Tables
Table 1 — Conducting path lengths . 12
Table 2 — Testing cross-sections of main and branch conductors . 13
Table 3 — Heat cycles . 17
Table 4 — Test requirements . 22
Table A.1 — Dimensions of equalizers . 29
European foreword
This document (EN 50483-5:2026) has been prepared by CLC/TC 20 “Electric cables”.
The following dates are fixed:
• latest date by which this document has to be (dop) 2027-04-30
implemented at national level by publication of
an identical national standard or by
endorsement
• latest date by which the national standards (dow) 2029-04-30
conflicting with this document have to be
withdrawn
This document supersedes EN 50483-5:2009 and all of its amendments and corrigenda (if any).
— Scope was extended to brackets.
This is Part 5 of the EN 50483 series “Test requirements for low voltage aerial bundled cable accessories”,
which has six parts:
— Part 1: Generalities;
— Part 2: Tension and suspension clamps, fittings and brackets for self-supporting system;
— Part 3: Tension and suspension clamps, fittings and brackets for neutral messenger system;
— Part 4: Connectors;
— Part 5: Electrical ageing test;
— Part 6: Environmental testing.
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.
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.
Introduction
The objective of the EN 50483 series is to provide a method of testing the suitability of accessories when used
under normal operating conditions with low voltage aerial bundled cables (ABC) complying with HD 626 S2.
This document does not invalidate existing approvals of products achieved on the basis of national standards
and specifications and/or the demonstration of satisfactory service performance. However, products approved
according to such national standards or specifications cannot directly claim approval to this document. It might
be possible, subject to agreement between supplier and purchaser, and/or the relevant conformity
assessment body, to demonstrate that conformity to the earlier standard can be used to claim conformity to
this document, provided an assessment is made of any additional type testing that might need to be carried
out. Any such additional testing that is part of a sequence of testing cannot be done separately.
1 Scope
The EN 50483 series applies to overhead line fittings for tensioning, supporting and connecting aerial bundled
cables (ABC) of rated voltage U /U (U ): 0,6/1 (1,2) kV.
0 m
This document applies to the connections described in EN 50483-4, including branch connectors, Insulation
Piercing Connectors (IPC), pre-insulated lugs (terminals) and through pre-insulated connectors (sleeves).
Two classes of connectors are covered by this document:
— Class A: These are connectors intended for electricity distribution or industrial networks in which they can
be subjected to short-circuits of relatively high intensity and duration. As a consequence, Class A
connectors will be suitable for the majority of applications.
— Class B: These are connectors for networks in which overloads or short-circuits are rapidly cleared by the
operation of protection devices.
Depending on their application, the connectors are subjected to heat cycles and short-circuit current tests.
Class A: the connectors are subjected to heat cycles and short-circuit current tests.
Class B: the connectors are subjected to heat cycles only.
The object of this document is to define the heating cycles test methods and requirements which apply to
compression through connectors, insulation piercing connectors and all other type of connections for low
voltage aerial bundled cables.
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.
EN 50483-1:2026, Test requirements for low voltage aerial bundled cable accessories – Part 1: Generalities
EN IEC 61238-1-2:2019, Compression and mechanical connectors for power cables - Part 1-2: Test methods
and requirements for insulation piercing connectors for power cables for rated voltages up to 1 kV (Um = 1,2
kV) tested on insulated conductors (IEC 61238-1-2:2018)
IEC 60050-461, International Electrotechnical Vocabulary (IEV) – Part 461: Electric cables
3 Terms and definitions
For the purposes of this document, the terms and definitions given in IEC 60050-461 and the following apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https://www.iso.org/obp/
— IEC Electropedia: available at https://www.electropedia.org/
3.1
adiabatic
occurring with no addition or loss of heat from the system under consideration
3.2
aerial bundled cable
ABC
aerial cable consisting of a group of insulated conductors which are twisted together including, or not, a non-
insulated conductor
[SOURCE: IEV 461-08-02, modified]
Note 1 to entry: The terms bundled conductors, bundled cables, bundled cores, conductor bundles and bundle could be
used as equivalent to the term aerial bundled cable (ABC).
3.3
aerial-insulated cable
insulated cable designed to be suspended overhead and outdoors
[SOURCE: IEV 461-08-01]
3.4
branch connector
metallic device for connecting a branch conductor to a main conductor at an intermediate point on the latter
[SOURCE: IEV 461-17-05]
3.5
branch conductor
conductor connected to the main conductor by a connector
3.6
conductor insulation
insulation applied on a conductor
[SOURCE: IEV 461-02-02, modified]
3.7
conductor
part of a cable which has the specific function of carrying current
[SOURCE: IEV 461-01-01]
3.8
connector
metallic device to connect cable conductors together
[SOURCE: IEV 461-17-03]
3.9
core
assembly comprising conductor and its own insulation
[SOURCE: IEV 461-04-04, modified]
3.10
equalizer
arrangement used in the test loop to ensure a point of equipotential and uniform current distribution in a
stranded conductor
[SOURCE: IEC 61238-1-2:2018, 3.5]
3.11
insulation
insulating materials incorporated in a cable with the specific function of withstanding voltage
[IEV 461-02-01]
3.12
insulation piercing connector
IPC
connector in which electrical contact with the conductor is made by metallic protrusions which pierce the
insulation of the ABC core
[SOURCE: IEV 461-11-08, modified]
3.13
median connector
connector which during the first heat cycle records the third highest temperature of the six connectors in the
test loop
3.14
pre-insulated lug
pre-insulated terminal lug
insulated metallic device for connecting an insulated cable conductor to other electrical equipment
[SOURCE: IEC 61238-1-2:2018, 3.8]
3.15
pre-insulated through connector
pre-insulated through connector sleeve
insulated metallic device for connecting two consecutive lengths of insulated conductors
3.16
reference conductor
length of conductor(s) without any joints, which is included in the test loop and which enables the reference
temperature and reference resistance(s) to be determined
3.17
reusable connector
connector for connecting ABC to stripped cable or bare conductor where only the branch connection can be
reused
3.18
sheath
uniform and continuous tubular covering of metallic or non-metallic material, generally extruded
[SOURCE: IEV 461-05-03]
3.19
shear head
head of a bolt, or a device fitted over the head of a bolt or a nut, which is designed to break at a specified
torque
3.20
type test
test required to be made before supplying a type of material covered by this document on a general
commercial basis, in order to demonstrate satisfactory performance characteristics to meet the intended
application
Note 1 to entry: These tests are of such a nature that, after they have been made, they need not be repeated unless
changes are made to the accessory materials, design or type of manufacturing process which might change the
performance characteristics.
4 Symbols
A, A , A electrical cross-sectional area of the conductors
1 2
D conductor diameter
D equalizer diameter
Eq
d conductor length between connectors
I direct current flowing through a connection during resistance measurement
I equivalent r.m.s. short-circuit current
rms
I alternating current necessary to maintain the reference conductor at its equilibrium
N
temperature
ℓ , ℓ , ℓ lengths of the conductor assembly associated with the measurement points after jointing
a b j
ℓ length of equalizer
e
ℓ ℓ , ℓ length of the reference conductor between measurement points
r, ra rb
R , R linear resistance of conductors of respectively cross-section A and A
1 2 1 2
R , R , R the calculated resistance between two equalizers and corrected to 20 °C
20 ra rb
TC thermocouple
t heating period within heat cycle
t cooling period within heat cycle
t time period to reach the required temperature on the reference cable
1-a
t time period of stable temperature on the median connector
1-b
U potential difference between measurement points of reference conductor of cross-section A
AB 1
U potential difference between measurement points of the connector
CD
U potential difference between measurement points of reference conductor of cross-section A
EF 2
𝛼𝛼 temperature coefficient of resistance at 20 °C
𝛽𝛽 mean scatter of the connector resistance factors
Δθ temperature difference between reference cable and connector
j
𝛿𝛿 initial scatter of the connector resistance factors
𝜆𝜆 resistance factor ratio; change in the resistance of the connector relative to its initial
resistance
𝜃𝜃 temperature of a connector while measuring resistances
θ maximum temperature recorded on a connector over the total period of test
max
θ highest rated temperature of insulating compound in normal operation
N
θ temperature of the reference conductor determined in the first heat cycle
R
θ temperature of the reference conductor while measuring resistances
r
θ temperature of the reference conductor at the moment of measuring θ
ref max
5 Type test
5.1 Principle
Connectors shall be subjected to 1 000 cycles of heating and cooling. The cold resistance of the connectors
shall be measured at specific steps to determine their suitability when used with conductors carrying a load.
Heat cycle and, short-circuit tests shall be made with alternating current.
Direct current may be used for heat cycle only when agreed between the customer and the manufacturer
and/or the supplier.
5.2 Test arrangement
5.2.1 Installation
5.2.1.1 General
The test circuit shall be as shown in Figure 7, 8, 9, 10 or 11.
Figures 7, 8, 9, 10 or 11 represent the test circuits respectively for main and branch connectors having equal
cross-sections and linear resistance(s); for main and branch connectors having unequal cross-sections and
linear resistance(s); for through connectors having equal or unequal cross-sections and linear resistance(s);
for terminal lugs.
5.2.1.2 Optional immersion test
EN 50483-6:2026, 8.4.3.1 provides an optional immersion test for samples which are intended for use in
saline polluted areas. When the inclusion of this test has been agreed between the customer and the
manufacturer and/or the supplier, this heat cycle test shall be modified to accommodate immersion of the test
samples during each cycle.
5.2.2 Disconnection devices
The test circuit may include sectioning joints so that it can be dismantled and short-circuit tests can be made
easily.
In Figure 8, the disconnection devices (X) are
— closed when the circuit is carrying heating current, and
— opened when resistance measurements and short-circuit applications are being made.
The sectioning joints shall be arranged and constructed so that they do not significantly affect the
measurements.
5.2.3 Conductors
Phase and neutral conductors including reference conductors used in the test circuit shall remain insulated
(except bare conductors).
5.2.4 Method of measuring ambient temperature
It is important that ambient temperature is measured accurately and is not affected by the heating produced
by the test. The following provides a proven method for achieving this measurement though alternative
methods can be used.
Ambient temperature shall be measured at the middle of the test loop with a thermocouple whose junction is
placed in a polished metallic tube manufactured from metal foil formed into a cylinder. Its height shall be
100 mm and its diameter shall be between 35 mm and 45 mm. The thermocouple shall be located
approximately at one third of the tube height from its upper end and fitted to it (e.g. with a cross-support).
5.2.5 Ambient conditions
The test loop shall be installed in a location where the air is not disturbed. The ambient temperature of the test
location shall be between 15 °C and 30 °C.
During the connector installation and resistance measurements, ambient temperature shall remain within the
limits of (23 ± 3) °C and recorded.
5.2.6 Equalizers
For stranded conductors, potential between the strands at measuring points can cause errors in measuring
electrical resistance.
Welded or soldered equalizers, as shown in Annex A, shall be used to overcome this problem, and to ensure
uniform current distribution in the reference conductor. Welded or soldered equalizers shall be the
recommended methods to ensure reliable measurements.
Other methods may be used provided that they give comparable results and do not affect the temperature of
the connectors or the reference conductor.
Annex A provides details on the construction of welded equalizers.
5.2.7 Lengths and configurations of conducting paths

Key
1 conductor 1
2 conductor 2
3 insulation
4 branch connector
5 sleeve connector
A, B, C, D, E, F equalizers (see Annex A)
A and A cross-sections relative to conductivity of the conductors 1 and 2 in mm
1 2
A, B potential points for measuring the potential difference between the extremities of the reference conductor
corresponding to conductor of cross-section A
E, F potential points for measuring the potential difference between the extremities of the reference conductor
corresponding to conductor of cross-section A
ℓ distance between potential points A and B
ra
C, D potential points for measuring the potential difference between the extremities of the related connector
ℓ distance between potential points E and F
rb
ℓ distance between C and the nearest surface of the connector body
a
ℓ distance between D and the nearest surface of the connector body
b
ℓ and ℓ are dependent on the cross-section A of the related conductor according to the Table 1 below.
a b
Figure 1 — Lengths and configurations of conducting paths
The conducting path lengths (see Figure 1, 7, 8, 9, 10 or 11) shall comply with Table 1.
Table 1 — Conducting path lengths
Conductor cross-section A Nominal distances ℓ or ℓ
a b
mm
mm
A ≤ 50 150
50 < A ≤ 120 200
120 < A ≤ 240 250
If A ≠ A , the cross-section of the reference conductor related to conductor A shall be A and the cross-
1 2 1 1
shall be A . Both reference conductors shall have the same
section of the reference conductor related to A
2 2
length ℓ = ℓ + ℓ .
r a b
Potential points shall be placed at a distance ℓ and ℓ from the nearest surface of the connector body.
a b
Conductor length between connectors shall be a distance d, expressed in millimetres, at least equal to 80 √A,
subject to a minimum of 500 mm. In the case of branch connectors, A shall be the cross-section of main
conductor.
Where a test loop comprises of only one cross-section of conductor, a single reference conductor shall be
used.
Where a test loop comprises of more than one cro
...