prEN 2283

SLOVENSKI STANDARD
01-september-2025
Aeronavtika - Preskušanje ožičenja pri zrakoplovih
Aerospace series - Testing of aircraft wiring
Luft- und Raumfahrt - Prüfung der Verkabelung von Luftfahrzeugen
Série aérospatiale - Vérification des câblages d'aéronefs
Ta slovenski standard je istoveten z: prEN 2283
ICS:
49.060 Letalska in vesoljska Aerospace electric
električna oprema in sistemi equipment and systems
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

DRAFT
EUROPEAN STANDARD
NORME EUROPÉENNE
EUROPÄISCHE NORM
July 2025
ICS 49.060 Will supersede EN 2283:2010
English Version
Aerospace series - Testing of aircraft wiring
Série aérospatiale - Vérification des câblages Luft- und Raumfahrt - Prüfung der Verkabelung von
d'aéronefs Luftfahrzeugen
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee ASD-
STAN.
If this draft becomes a European Standard, CEN 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 CEN in three official versions (English, French, German). A version in any other
language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC
Management Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and
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 STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2025 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 2283:2025 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
Introduction . 4
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 Tests . 6
4.1 General. 6
4.2 Continuity . 6
4.3 Dielectric strength . 6
4.4 Insulation resistance . 6
4.5 Partial discharge . 6
4.6 Test preparation . 7
5 Procedures . 7
5.1 General. 7
5.2 Testing of wiring in production . 9
5.2.1 Continuity . 9
5.2.2 Dielectric strength . 9
5.2.3 Partial discharge . 9
5.3 Testing of assembled and installed bundles . 10
6 Requirements . 10
7 Test report . 10
Bibliography . 12

European foreword
This document (prEN 2283:2025) has been prepared by ASD-STAN.
After enquiries and votes carried out in accordance with the rules of this Association, this document has
received the approval of the National Associations and the Official Services of the member countries of
ASD-STAN, prior to its presentation to CEN.
This document is currently submitted to the CEN Enquiry.
This document will supersede EN 2283:2010.
This document includes the following significant technical changes with respect to EN 2283:2010:
— a wiring category D is introduced for operating voltages above 230/400 V a.c.;
— a paragraph for partial discharge testing is added.
Introduction
Due to the diversity of aircraft, manufacturing and installing methods for wiring, the tests defined in
Clause 1 are carried out at different stages in the manufacturing programme:
— after assembly of cables into bundles before installation in the aircraft;
— after installation of bundles into the aircraft;
— after repairs or modifications.
1 Scope
This document specifies:
— the tests for finished wiring, including connectors and, if necessary, terminals, terminal ends, junction
boxes, circuit breakers, etc.;
— the requirements for verification of aircraft electrical wiring;
— continuity of circuits;
— dielectric strength;
— insulation resistance;
— partial discharge for operating voltages above 230/400 V a.c. (see also TR 4907 ).
These tests do not concern equipment installed in the aircraft (see operation of systems) and do not apply
to the wiring used in instrumentation.
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 2282, Aerospace series - Characteristics of aircraft electrical supplies
EN IEC 61557-2, Electrical safety in low voltage distribution systems up to 1 000 V AC and 1 500 V DC —
Equipment for testing, measuring or monitoring of protective measures — Part 2: Insulation resistance
EN IEC 61557-4, Electrical safety in low voltage distribution systems up to 1 000 V AC and 1 500 V DC —
Equipment for testing, measuring or monitoring of protective measures — Part 4: Resistance of earth
connection and equipotential bonding
IEC 60050-461, International Electrotechnical Vocabulary (IEV) — Part 461: Electric cables
IEC 60050-581, International Electrotechnical Vocabulary (IEV) — Part 581: Electromechanical
components for electronic equipment
IEC 60270, High-voltage test techniques — Charge-based measurement of partial discharges
3 Terms and definitions
For the purposes of this document, the terms and definitions given in IEC 60050-461 and IEC 60050-581
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/

Under preparation. Stage at the time of preparation: prEN/TR 4907:2025
4 Tests
4.1 General
NOTE For all the tests, national safety regulations can apply.
These tests may be carried out manually or on automated equipment. In the latter case, the equipment
operates with programmable sequences and trip thresholds.
The test shall be stopped as soon as a fault is detected, or the fault shall be memorized. The voltage shall
increase or decrease in a regular manner to each of the scheduled values and the measurements shall be
made after stabilization.
Test equipment can be capable of performing the dielectric strength and the insulation resistance tests
in a single operation, according to the requirements laid down in Table 2.
4.2 Continuity
The test enables to verify the conformity of cables, bundles and their connections with the design
documents.
The direct current or alternating current voltage shall not exceed 28 V.
The test shall be carried out with equipment according to EN IEC 61557-4.
The value of the current passed shall not cause damage to any part of the circuits.
4.3 Dielectric strength
The test enables to verify the insulation has the operating efficiency to withstand the voltage (limits)
given in EN 2282.
When the permitted leakage current is exceeded, the warning or protection system shall operate to avoid
damage to the components being tested.
It should be noted that in alternating current tests, the capacitive leakage currents add (vectorially) to
the fault currents detected. If the capacitive leakage current is too high a DC test voltage shall be used.
After each dielectric strength test, the measurement point shall be grounded in order to discharge the
circuit (except when this circuit remains connected to the reference point).
4.4 Insulation resistance
The test enables to verify the insulation resistance of the wiring is in a proper state to meet the operating
efficiency. The voltages used for these measurements are at least 50 V direct current.
The Test shall be carried out with equipment according to EN IEC 61557-2. The fault current shall not
exceed 5 mA (for a short-circuit).
The purpose of this test is not to measure the actual insulation resistance but to verify that it is above the
specified limit. For automatic testing the test duration shall be at least the specified test duration of the
voltage strength test.
4.5 Partial discharge
The test enables to verify the insulation of the harness will not be aged by partial discharge during its
normal operation.
The test does not intend to measure the partial discharge inception voltage or the partial discharge
extinction voltage but verifies there is no partial discharge at the specified test voltage.
4.6 Test preparation
The conductors and screens of screened or coaxial cables shall be tested in the same way as single core
cables, provided they are accessible at both ends.
The screened cable test, with respect to the ground, shall be carried out before the screens are grounded.
The connector shells covered with conducting protection or other conductive supports shall be grounded.
Electronic components housed in junction boxes shall be short-circuited or disconnected.
Connectors, switches, circuit breakers, etc. can be left in circuit provided that they can withstand the test.
Otherwise, the test voltage shall be decreased.
No equipment shall be connected.
The parts of circuits having already been brought into contact with flammable liquids or hydraulic fluids
shall only be tested when proper safety precautions are observed, so as to avoid any risk of explosion or
fire.
5 Procedures
5.1 General
The types of wiring, the systems to which they belong, and their functions require several categories
(see Table 1).
Table 1 — Wiring categories
Categories Description
A All wiring apart from specific cases dealt with under B to D
Specific circuits for each type of aircraft to be defined by mutual agreement between
B
manufacturers and authorities
Screened wiring, in principle isolated from the ground for tests, before being connected
C
to the ground
D Wiring for operating voltages above 230/400 Va.c. (see also TR 4907)
Aircraft wiring presenting installation difficulties and wiring that are not complete and require to be
finished in the aircraft shall be subject to test and inspection after installation (Table 2, Part II).
All the tests for wiring shall take place before the connection of equipment.
Electrical and electronic components connected within the wiring shall not be exposed to voltages and
...