ISO 2635:2003/Amd 1:2017

Overview

ISO 2635:2003/Amd 1:2017 is an international standard developed by the International Organization for Standardization (ISO) that specifies dimensions and characteristics for conductors used in general purpose aircraft electrical cables and aerospace applications. This amendment addresses a correction of Table 1, which details the conductor specifications such as nominal cross-sectional areas, mechanical properties, and electrical resistance.

The standard is essential for manufacturers, designers, and engineers involved in aerospace electrical systems, ensuring reliability, consistency, and safety for aircraft wiring components. By harmonizing conductor parameters, ISO 2635 supports interoperability and compliance within the aerospace industry.

Key Topics

• Conductor Dimensions: The corrected Table 1 lists precise nominal cross-sectional areas (in mm²) for copper and copper alloy conductors used in aircraft electrical cables, aligned with American Wire Gauge (AWG) references.
• Electrical Resistance: Maximum electrical resistance values at 20°C are defined for each conductor size to guarantee efficient electrical performance in aerospace environments.
• Mechanical Properties: Characteristics such as elongation percentages, ultimate tensile load, and strand composition (number and diameter of wires per conductor) are detailed to ensure mechanical robustness.
• Material Specification: Conductors consist primarily of copper and high-strength copper alloys, offering optimal conductivity and mechanical strength for aeronautical applications.
• Correction Details: Amendment 1 focuses specifically on updating Table 1 to correct previously published conductor data, improving the accuracy and reliability of the standard.

Applications

• Aircraft Electrical Systems: Standardized conductors are critical for wiring electrical power, communication signals, and instrumentation within aircraft, subject to rigorous mechanical and environmental demands.
• Aerospace Manufacturing: OEMs and cable manufacturers apply ISO 2635 to design and produce electrical cables that meet internationally recognized quality norms.
• Maintenance and Repairs: Airlines and aerospace maintenance organizations use the standard as a reference to verify conductor compatibility and performance during aircraft servicing.
• Quality Assurance: Regulatory bodies and certification agencies reference this standard to ensure aerospace electrical components meet safety and reliability benchmarks.
• Aerospace R&D: Research and development of new aerospace electrical components rely on established conductor characteristics for testing and innovation.

Related Standards

• ISO/IEC Directives, Part 1 & 2: Defines procedures and editorial rules followed in drafting and maintaining ISO standards, including ISO 2635.
• IEC Standards for Aerospace Electrical Systems: Complementary standards detailing electrical testing, insulation, and cable assembly in the aerospace sector.
• ISO 9001 (Quality Management Systems): Often applied alongside ISO 2635 to maintain consistent quality in aerospace component manufacturing.
• FAA and EASA Wiring Standards: Regional aviation authorities’ standards that align with or reference ISO conductor specifications to ensure compliance.

Keywords: ISO 2635, aircraft conductor standard, aerospace electrical cables, conductor dimensions, copper alloy conductors, aviation wiring, electrical cable specifications, aerospace standards, aircraft electrical components, conductor mechanical properties