Aerospace series - Cables, electrical, aircraft use - Test methods - Part 417: Fire resistance of cables confined inside a harness

This standard specifies a method of testing the fire resistance of fire resistance or fire-proof electrical cables inside a harness.
The objective of this test is to qualify these cables when they are confined inside harnesses defined hereafter. Described configurations try to be representative of various cables configuration installed in Aircraft.
It shall be used together with EN 3475-100.

Luft- und Raumfahrt - Elektrischen Leitungen für Luftfahrt Verwendung - Prüfverfahren - Teil 417: Feuerbeständigkeit von Leitungen eingebunden in Bündeln

Diese Norm legt ein Verfahren zur Prüfung der Feuerbeständigkeit von in einem Bündel eingebundenen feuerbeständigen oder feuerfesten elektrischen Leitungen fest.
Das Ziel dieser Prüfung ist es, diese Leitungen zu qualifizieren, wenn sie in Bündeln, wie nachstehend festgelegt, eingebunden sind. Die beschriebenen Konfigurationen sollen repräsentativ für die in Flugzeugen eingebauten unterschiedlichen Leitungskonfigurationen sein.
Sie ist in Verbindung mit EN 3475 100 anzuwenden.

Série aérospatiale - Câbles électriques à usage aéronautique - Méthodes d'essais - Partie 417: Tenue au feu des câbles confinés dans un harnais

Aeronavtika - Električni kabli za uporabo v zračnih plovilih - Preskusne metode - 417. del: Požarna odpornost kablov v snopih

General Information

Status
Published
Publication Date
19-Apr-2009
Technical Committee
I13 - Imaginarni 13
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
25-Mar-2009
Due Date
30-May-2009
Completion Date
20-Apr-2009

Overview

EN 3475-417:2009 is a CEN aerospace test method that specifies how to assess the fire resistance of electrical cables when they are confined inside aircraft harnesses. The procedure is intended to qualify fire‑resistant or fire‑proof cables in configurations representative of those installed on aircraft. This part is intended to be used together with EN 3475-100 and references test apparatus and conditions from EN 3475-408 and ISO 2685.

Key Topics

  • Scope and purpose: Qualification of cable performance under combined flame and vibration when confined within harnesses representative of aircraft installations.
  • Specimen preparation: Three specimens per harness configuration, typically 0.75 m length. Harness codes defined in the standard include 002 (AWG 24), 006 (AWG 20) and 020 (AWG 14). Harnesses are built from a three‑core cable type (EN 2346 series) arranged in bundles of 4, 12 and 19 cables as representative examples.
  • Apparatus and conditions: Test equipment follows EN 3475-408 with burner characteristics aligned to ISO 2685 (flame temperature ~1100 °C, specified flame width and heat flux). The test frame is vibrated perpendicular to the cable axis at ~30 Hz and minimum 4 g acceleration.
  • Test method: Each sample is subjected to combined flame and vibration for 5 minutes, with vibration maintained for an additional 10 minutes after flame removal. Insulation resistance measurements are taken between defined equipotentials (E1/E2 and E3/E4) during the test.
  • Acceptance criteria: Electrical continuity and insulation resistance monitoring are required. Minimum insulation resistance is 10 000 ohms unless the product standard specifies otherwise.
  • Measurement principle: Annex A contains circuit diagrams and principles for equipotential measurements used to assess insulation resistance and continuity during the test.

Applications

  • Qualification of fire‑resistant and fire‑proof electrical cables for commercial and military aircraft harness assemblies.
  • Supporting supplier and design validation when cables are installed in confined bundle configurations where exposure to localized fire and vibration is possible.
  • Demonstrating compliance with aerospace safety requirements and informing installation practice for harness routing and protection.

Related Standards

  • EN 3475-100 - General test methods for aerospace electrical cables (required companion document).
  • EN 3475-408 - Fire resistance test apparatus and general requirements referenced by this method.
  • EN 2346-002 - Cable constructions used to build the harness specimens (three‑core fire‑resistant cable series).
  • ISO 2685 - Burner and environmental conditions for fire testing in designated fire zones.

This standard provides practical, repeatable procedures to evaluate cable performance when confined inside harnesses, ensuring that manufacturers and test laboratories have a consistent method to qualify cable systems for safe operation in aircraft environments.

Standard

SIST EN 3475-417:2009

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7 pages
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Frequently Asked Questions

SIST EN 3475-417:2009 is a standard published by the Slovenian Institute for Standardization (SIST). Its full title is "Aerospace series - Cables, electrical, aircraft use - Test methods - Part 417: Fire resistance of cables confined inside a harness". This standard covers: This standard specifies a method of testing the fire resistance of fire resistance or fire-proof electrical cables inside a harness. The objective of this test is to qualify these cables when they are confined inside harnesses defined hereafter. Described configurations try to be representative of various cables configuration installed in Aircraft. It shall be used together with EN 3475-100.

This standard specifies a method of testing the fire resistance of fire resistance or fire-proof electrical cables inside a harness. The objective of this test is to qualify these cables when they are confined inside harnesses defined hereafter. Described configurations try to be representative of various cables configuration installed in Aircraft. It shall be used together with EN 3475-100.

SIST EN 3475-417:2009 is classified under the following ICS (International Classification for Standards) categories: 49.060 - Aerospace electric equipment and systems. The ICS classification helps identify the subject area and facilitates finding related standards.

SIST EN 3475-417:2009 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.

Standards Content (Sample)


SLOVENSKI STANDARD
01-junij-2009
$HURQDYWLND(OHNWULþQLNDEOL]DXSRUDERY]UDþQLKSORYLOLK3UHVNXVQHPHWRGH
GHO3RåDUQDRGSRUQRVWNDEORYYVQRSLK
Aerospace series - Cables, electrical, aircraft use - Test methods - Part 417: Fire
resistance of cables confined inside a harness
Luft- und Raumfahrt - Elektrischen Leitungen für Luftfahrt Verwendung - Prüfverfahren -
Teil 417: Feuerbeständigkeit von Leitungen eingebunden in Bündeln
Série aérospatiale - Câbles électriques à usage aéronautique - Méthodes d'essais -
Partie 417: Tenue au feu des câbles confinés dans un harnais
Ta slovenski standard je istoveten z: EN 3475-417:2009
ICS:
49.060 /HWDOVNDLQYHVROMVND Aerospace electric
HOHNWULþQDRSUHPDLQVLVWHPL equipment and systems
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN 3475-417
NORME EUROPÉENNE
EUROPÄISCHE NORM
March 2009
ICS 49.060
English Version
Aerospace series - Cables, electrical, aircraft use - Test
methods - Part 417: Fire resistance of cables confined inside a
harness
Série aérospatiale - Câbles électriques à usage Luft- und Raumfahrt - Elektrischen Leitungen für Luftfahrt
aéronautique - Méthodes d'essais - Partie 417: Tenue au Verwendung - Prüfverfahren - Teil 417: Feuerbeständigkeit
feu des câbles confinés dans un harnais von Leitungen eingebunden in Bündeln
This European Standard was approved by CEN on 30 August 2008.
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. Up-to-date lists and bibliographical references concerning such national
standards may be obtained on application to the CEN Management Centre or to any CEN 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 CEN member into its own language and notified to the CEN Management Centre has the same status as the
official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,
Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2009 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 3475-417:2009: E
worldwide for CEN national Members.

Contents Page
Foreword .3
1 Scope .4
2 Normative references .4
3 Preparation of specimens .4
4 Apparatus .4
5 Method .5
6 Requirements/Acceptance criteria .6
Annex A (normative) Circuit diagram principle for measurement of equipotentials .7
Foreword
This document (EN 3475-417:2009) has been prepared by the Aerospace and Defence Industries Association
of Europe - Standardization (ASD-STAN).
After enquiries and votes carried out in accordance with the rules of this Association, this Standard has
received the approval of the National Associations and the Official Services of the member countries of ASD,
prior to its presentation to CEN.
This European Standard shall be given the status of a national standard, either by publication of an identical
text or by endorsement, at the latest by September 2009, and conflicting national standards shall be
withdrawn at the latest by September 2009.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights.
According to the CEN/CENELEC Internal Regulations
...

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