SIST EN 3475-508:2007

• Abstract:

  This standard specifies the procedures for measuring the plating thickness and centricity of metallic coatings on single conductors.; It shall be used together with EN 3475-100.

• Status: Published
• Publication Date: 03-Oct-2007
• ICS: 49.060 - Aerospace electric equipment and systems
• Technical Committee: I13 - Imaginarni 13
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 21-Sep-2007
• Due Date: 26-Nov-2007
• Completion Date: 04-Oct-2007
• Ref Project: EN 3475-508:2007 - Aerospace series - Cables, electrical, aircraft use - Test methods - Part 508: Plating thickness

• Replaces: SIST EN 3475-508:2004 - Aerospace series - Cables, electrical, aircraft use - Test methods - Part 508: Plating thickness
• Effective Date: 01-Nov-2007
• Refers: SIST EN 3475-100:2010 - Aerospace series - Cables, electrical, aircraft use - Test methods - Part 100: General
• Effective Date: 28-Jan-2026
• Referred By: SIST EN 4604-009:2026 - Aerospace series - Cable, electrical, for signal transmission - Part 009 : Cable, coaxial, light weight, 50 ohms, 180 °C, type KW (light WN) - Product standard
• Effective Date: 09-Sep-2026
• Referred By: SIST EN 4604-010:2026 - Aerospace series - Cable, electrical, for signal transmission - Part 010 : Cable, coaxial, light weight, 50 ohms, 200 °C, type KX (light WD) - Product standard
• Effective Date: 09-Sep-2026
• Referred By: SIST EN 2267-009:2017 - Aerospace series - Cables, electrical, for general purpose - Operating temperatures between - 55 °C and 260 °C - Part 009: DRA family, single and multicore assembly - Product standard
• Effective Date: 28-Jan-2026
• Referred By: SIST EN 2713-007:2006 - Aerospace series - Cables, electrical, single and multicore for general purpose - Operating temperatures between - 55 °C and 200 °C - Part 007: Screened (spiral) and jacketed, UV laser printable - Product standard
• Effective Date: 28-Jan-2026
• Referred By: SIST EN 2714-013:2025 - Aerospace series - Cables, electrical, single and multicore for general purpose - Operating temperatures between - 55 °C and 260 °C - Part 013: DR family, screened (spiral) and jacketed, UV laser printable - Product standard
• Effective Date: 28-Jan-2026
• Referred By: SIST EN 2713-012:2017 - Aerospace series - Cables, electrical, single and multicore for general purpose - Operating temperatures between - 55 °C and 200 °C - Part 012: MNA (1 core), MNB (pair), MNC (3 cores), MND (4 cores), cables family - Silver plated copper screened (spiral) and jacketed, UV laser printable - Product standard
• Effective Date: 28-Jan-2026
• Referred By: SIST EN 2713-012:2022 - Aerospace series - Cables, electrical, single and multicore for general purpose - Operating temperatures between -55 °C and 200 °C - Part 012: MNA (1 core), MNB (pair), MNC (3 cores), MND (4 cores), cables family - Silver-plated copper screened (spiral) and jacketed, UV laser printable - Product standard
• Effective Date: 28-Jan-2026
• Referred By: SIST EN 2714-014:2010 - Aerospace series - Cables, electrical, single and multicore for general purpose - Operating temperatures between - 55 °C and 260 °C - Part 014: DR family, 5 to 10 cores, taped, screened (braided) and jacketed, UV laser printable - Product standard
• Effective Date: 28-Jan-2026
• Referred By: SIST EN 4612-004:2012 - Aerospace series - Cables, electrical, for general purpose, single and multicore assembly - XLETFE Family - Jacketed or screened and jacketed - Part 004: Tin plated copper - Operating temperatures, between - 65 °C and 135 °C - Single extruded wall for open applications, with jacket and screen (braid) - UV laser printable - Product standard
• Effective Date: 28-Jan-2026
• Referred By: SIST EN 4612-002:2019 - Aerospace series - Cables, electrical, for general purpose, single and multicore assembly - XLETFE Family - Jacketed or screened and jacketed - Part 002: General
• Effective Date: 28-Jan-2026
• Referred By: SIST EN 4604-007:2008 - Aerospace series - Cable, electrical, for signal transmission - Part 007: Cable, coaxial 50 ohm, 200 °C, type WN - Product standard
• Effective Date: 28-Jan-2026
• Referred By: SIST EN 4612-010:2019 - Aerospace series - Cables, electrical, for general purpose, single and multicore assembly - XLETFE Family - Jacketed or screened and jacketed - Part 010: Silver plated copper - Operating temperatures, between -65 °C and 150 °C - Dual extruded wall for open applications, with jacket and screen (braid) - UV laser printable - Product standard
• Effective Date: 28-Jan-2026
• Referred By: SIST EN 2714-006:2009 - Aerospace series - Cables, electrical, single and multicore for general purpose - Operating temperatures between - 55 °C and 260 °C - Part 006: Screened (braided) and jacketed, CO2 laser printable - Product standard
• Effective Date: 28-Jan-2026

SIST EN 3475-508:2007 is the Slovenian adoption of EN 3475-508:2007 from CEN. It specifies test methods for measuring the plating thickness and centricity of metallic coatings on single conductors used in aerospace electrical cables, and it is intended to be used together with EN 3475-100.

What does SIST EN 3475-508:2007 specify?

SIST EN 3475-508:2007 sets out how to measure plating thickness and, where required, centricity for metallic coatings on single conductors. In practice, this is the test method part of the aerospace cable series, so it tells laboratories how to prepare samples, which measuring techniques to use, and how to report results.

The document is organized into Scope, Normative references, Test methods and Requirements. Clause 3 contains five alternative test methods, and Clause 4 states where the acceptance values must be defined.

What are the key requirements of SIST EN 3475-508:2007?

• Clause 3.1 allows five methods for measuring plating thickness, and in case of dispute method 4 is the reference method. This matters because suppliers and customers need a common fallback method when results are challenged.

• Clause 3.2 describes atomic absorption spectrometry (AAS) for determining average plating thickness from the concentration of dissolved coating material. The method uses standard solutions for calibration and three dissolved strand samples; it can measure thickness but not centricity, so it is suited to average coating checks rather than cross-sectional assessment. Table 1 gives typical flame AAS detection limits for the metals named in the text.

• Clause 3.3 uses a scanning electron microscope (SEM) to measure both thickness and centricity of metallic coatings. The sample is embedded, cut, ground, polished, etched and then examined, which means the method supports detailed cross-sectional verification and visual documentation of coating distribution.

• Clause 3.4 uses an optical microscope with a maximum magnification of 800 times. It is stated to be usable from coating thicknesses greater than 2 µm, so it is intended for coatings thick enough to be measured reliably with optical imaging.

• Clause 3.5 uses galvanic removal, also called the coulometric method, to measure average plating thickness. The coating and base material must be known, and centricity cannot be assessed, so this method is mainly for direct thickness measurement when the material system is identified in advance.

• Clause 3.6 uses chemical removal of the coating and calculates average thickness from weight loss and specimen dimensions. It is described as useful when the plating is not regular, but it cannot determine centricity or minimum thickness at one point; the procedure also requires a 50 cm specimen, fresh solution for each test, and reporting if removal time has to be extended. Table 2 links coating and base-material combinations to the appropriate solution.

• Clause 4 states that the minimum plating thickness, and centricity when required, shall be given in the technical specifications or product standards. In practice, this means SIST EN 3475-508:2007 provides the measurement methods, while the pass-fail limits come from the applicable product definition.

What terms does SIST EN 3475-508:2007 define?

• Plating thickness - the thickness of the metallic coating on the conductor that the test methods measure.
• Centricity - the distribution of the metal coating around the conductor, assessed by comparing the smallest and largest measured thickness values.
• AAS - atomic absorption spectrometry, used in Clause 3.2 to determine coating concentration after dissolution.
• SEM - scanning electron microscope, used in Clause 3.3 to inspect a prepared cross section at high resolution.
• Coulometric method - the galvanic removal method in Clause 3.5, where coating removal time is used to determine average thickness.
• Base material - the material beneath the coating being measured; the text notes that it must be known for methods 4 and 5.
• Single conductor - the conductor form covered by the scope, meaning the methods are aimed at individual coated conductors rather than assembled cable structures.

Who uses SIST EN 3475-508:2007?

SIST EN 3475-508:2007 is used by aerospace cable manufacturers, test laboratories, quality managers and inspection teams that verify plated conductors. It is also relevant to engineers writing technical specifications or product standards, because Clause 4 expects them to state the minimum thickness and any centricity requirement. Buyers and suppliers in the aerospace electric equipment and systems supply chain use it when they need a common test method for acceptance or dispute testing.

What changed in SIST EN 3475-508:2007 from the previous edition?

SIST EN 3475-508:2007 supersedes EN 3475-508:2002.

Which standards are used with SIST EN 3475-508:2007?

• EN 3475-100 - provides the general test-method rules for the EN 3475 series and is required to use this part correctly.
• ISO 6955 - supplies the vocabulary for analytical spectroscopic methods used in the AAS method.

What does the SIST EN 3475-508:2007 document contain?

The document contains detailed laboratory procedures for five measurement routes: AAS, SEM, optical microscopy, galvanic removal and chemical removal. It includes sample preparation steps such as embedding, cutting, polishing and etching, plus calibration guidance for AAS and equipment accuracy requirements for the chemical-removal method.

It also contains practical measurement aids. Table 1 gives typical detection limits for flame AAS, and Table 2 links coating and base-material combinations to suitable chemical solutions. Clause 3.6.3 also gives a calculation formula for thickness based on specimen weight and dimensions, which is useful for lab reporting and verification.

Overall, the standard is a test-method document for coating thickness and centricity on single conductors, not a product specification. The acceptance values have to come from the relevant technical specification or product standard.

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Aerospace series - Cables, electrical, aircraft use - Test methods - Part 508: Plating thicknessSérie aérospatiale - Câbles électriques a usage aéronautique - Méthodes d'essais - Partie 508 : Epaisseur du revetementLuft- und Raumfahrt - Elektrische Leitungen für Luftfahrtverwendung - Prüfverfahren - Teil 508: Schichtdicke des UberzugsTa slovenski standard je istoveten z:EN 3475-508:2007SIST EN 3475-508:2007en49.060Aerospace electric equipment and systemsICS:SIST EN 3475-508:20041DGRPHãþDSLOVENSKI
STANDARDSIST EN 3475-508:200701-november-2007

EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 3475-508August 2007ICS 49.060Supersedes EN 3475-508:2002
English VersionAerospace series - Cables, electrical, aircraft use - Testmethods - Part 508: Plating thicknessSérie aérospatiale - Câbles électriques à usageaéronautique - Méthodes d'essais - Partie 508 : Epaisseurdu revêtementLuft- und Raumfahrt - Elektrische Leitungen fürLuftfahrtverwendung - Prüfverfahren - Teil 508:Schichtdicke des UberzugsThis European Standard was approved by CEN on 21 June 2007.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards 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 translationunder the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as theofficial 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 STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2007 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 3475-508:2007: E
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