ISO 2155-1974 PDF

Full title and description

St ISO 2155-1974 — Aircraft — Fire-resisting electrical cables — Performance requirements. This standard specifies performance requirements for fire‑resisting electrical cables intended for aircraft wiring, covering constructional features (single conductors with copper core and nickel or equivalent covering), electrical ratings and high‑temperature endurance for continuous and short‑term exposures.

Abstract

Gives the requirements for cables for the wiring of aircraft circuits, comprising single conductors with copper core covered with nickel or any other material of equivalent properties. The cables are suitable for use at a rated voltage up to 600 V and at a frequency not exceeding 2 000 Hz, and are intended for service temperatures that may reach about 280 °C in continuous service and 400 °C for limited periods.

General information

• Status: Published (International Standard; confirmed during ISO review cycles).
• Publication date: February 1974 (1974-02).
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 49.060 (Aerospace engineering / aircraft systems).
• Edition / version: Edition 1 (1974).
• Number of pages: 3 pages.

Scope

Specifies performance requirements for fire‑resisting electrical cables intended for the wiring of aircraft circuits. The scope includes constructional description (single conductor, copper core with nickel or equivalent covering), electrical ratings (up to 600 V and up to 2 000 Hz) and temperature performance (continuous service around 280 °C and short‑term exposure up to 400 °C). The standard defines required performance characteristics rather than exhaustive test methods (test methods are covered in the companion standard ISO 2156:1974).

Key topics and requirements

• Definition of acceptable conductor construction (copper core with nickel or equivalent covering) and intended application in aircraft wiring systems.
• Electrical ratings: suitability up to 600 V and frequencies up to 2 000 Hz.
• Thermal performance: continuous service temperature around 280 °C and limited‑time resistance to approximately 400 °C.
• Performance criteria for fire resistance and integrity under elevated temperature conditions (requirements rather than detailed test procedures).
• Reference to companion test methods standard (ISO 2156:1974) for verification of performance.

Typical use and users

Used by aerospace manufacturers, aircraft electrical system designers, cable and wire manufacturers for aerospace applications, certification and qualification authorities, and maintenance organizations that specify or verify high‑temperature, fire‑resistant wiring for aircraft. The standard is typically applied when selecting or qualifying cable types for aircraft systems where fire resistance and high‑temperature endurance are required.

Related standards

Companion and related documents include ISO 2156:1974 (Aircraft — Fire‑resisting electrical cables — Methods of test). Other related national and international standards address fire testing and cable performance (e.g., various IEC and aerospace industry specifications for cable fire performance and electrical characteristics).

Keywords

aircraft; fire‑resisting cables; electrical cables; nickel‑covered copper; high temperature; 600 V; aerospace wiring; cable performance requirements.

FAQ

Q: What is this standard?

A: ISO 2155:1974 is an international standard that sets performance requirements for fire‑resisting electrical cables intended for aircraft wiring.

Q: What does it cover?

A: It covers the required performance characteristics and application limits for single‑conductor aircraft cables with copper cores covered by nickel or equivalent, including electrical ratings (up to 600 V, up to 2 000 Hz) and high‑temperature endurance (continuous ~280 °C and short‑term ~400 °C). Test methods are addressed in the companion standard ISO 2156:1974.

Q: Who typically uses it?

A: Aerospace OEMs, cable manufacturers, aircraft electrical designers, maintenance and certification bodies involved in specifying, manufacturing or qualifying fire‑resistant wiring for aircraft.

Q: Is it current or superseded?

A: The document was published in February 1974 and is recorded by ISO as an international standard that has gone through periodic confirmation/review cycles; it is listed as published/confirmed rather than formally withdrawn or replaced. Users should check the ISO catalogue or national standards bodies for any later revisions or replacements before relying on the standard for procurement or certification.

Q: Is it part of a series?

A: Yes — it is paired with ISO 2156:1974, which provides the methods of test for the performance requirements set out in ISO 2155:1974; both form a related set addressing aircraft fire‑resisting cables.

Q: What are the key keywords?

A: Aircraft, fire‑resisting, electrical cables, nickel‑covered copper, high temperature, cable performance, aerospace wiring.