EN 4681-001-2017 pdf download.Aerospace series – Cables, electric, general purpose, with conductors in aluminium or copper-clad aluminium – Part 001: Technical Specification.
This EN 4681-001 specifies the characteristics, test methods, qualification and acceptance conditions of single and multicore electric cables for general purpose with conductors in aluminium or copper-clad aluminium, intended for installation in aircraft electrical systems.
The insulation of these cables is designed to withstand aircraft voltages at a frequency not exceeding 2 000 Hz. Unless specified by individual product standards the maximum demonstrated voltage of rating of these cables is ac 115 V rms phase to neutral and 200 V rms phase to phase and 28 V d.c.
They are divided into types, the characteristics of which are given in the product standards. Unless otherwise specified in the product standard, the tests defined in this standard apply.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
EN 3475-100 (all parts), Aerospace series — Cables, electrical, aircraft use — Test methods — Part 100:
General
EN 3719, Aerospace series — Aluminium or aluminium alloy conductors for electrical cables — Product standard
EN 3838, Aerospace series — Requirements and tests on user-applied markings on aircraft electrical cables
EN 4651. Aerospace series Copper-clad aluminium alloy conductors for electrical cables — Product standard
EN 4681-002, Aerospace series — Cables, electric, general purpose, with conductors in aluminium or copper-clad aluminium — Part 002: General
EN 9133, Aerospace series — Quality Management Systems — Qualification Procedure for Aerospace Standard Products
ISO 2574, Aircraft — Electrical cables — Identification marking
TR 4648, Aerospace series — Cable, electrical — Re-qualification following changes in design, material or manufacturing process 1)
TR 4684, Aerospace series — Electrical technology and component definition ²).
3 Terms, definitions, symbols and abbreviations
For the purposes of this standard, the terms, definitions, symbols and abbreviations given in EN 3475-100 or TR 4684 apply.
4 Materials and construction of cables
4.1 Conductors
They shall conform to EN 4651 or EN 3719 unless otherwise specified.
4.2 Finished cables
The insulation material shall present a uniform circular cross-section throughout the length of the cable.
Covering over the insulation shall be treated and applied in such a manner that the cables present a smooth appearance and are able to accept marking.
All materials used shall have no corrosive effect upon the conductors and shall not be susceptible to attack by mould or other micro-organisms.
5 Required characteristics
The characteristics of the cables, tested according to the methods described hereafter shall comply with the values given in the product standard.
6 Tests methods
See Table la for single core cables and Table lb for multicore cables without jackets.
7.1 QualIfication
7.1.1 General requirements
See EN 9133.
7.1.2 Qualification conditions
The cables shall be submitted for qualification tests on drums, spools or In coils in sufficient lengths, wound evenly and uniformly.
Each drum, spool or coil shall have a label containing information given in 9.1.
7.1.3 Qualification tests See Tables la and lb.
7.1.4 First article inspection tests
The first article inspection tests are to be carried out on all cable designs that were not included in the
qualification demonstration. See Tables la and lb.
7.1.5 Extension of qualification
The qualification granted may be applicable to adjacent cross-sections in accordance with Table 2.
For cross sections that do not list the demonstration cable size or those in the sizes 9 mm2 to 107 mm2,
different reference cross-section may be selected after agreement with the Mandated Body.
7.2 Acceptance tests
7.2.1 Required conditions
7.2.1.1 General
See Tables Ia and lb.
The acceptance tests shall be carried out on cables delivered against an order to check that the cable characteristics are maintained.
7.2.1.2 Tests to be carried out on all cables
The cables which fail any of the tests specified in 7.2.2 shall be rejected.
7.2.1.3 Random sampling tests: retest
liany of the specimens fails one of the tests specified In 7.2.3, that test shall be repeated on another set of specimens of the same cross-section selected at random from the same batch. If one of these new specimens fails the test, the batch submitted for acceptance shall be rejected.
7.2.2 Production routine tests
The tests shall be carried out on all cables delivered.EN 4681-001-2017 pdf download.

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