IEC 60245-7:2026

Overview

IEC 60245-7:2026 is an international standard developed by the International Electrotechnical Commission (IEC) for rubber insulated cables with rated voltages up to and including 450/750 V. Specifically, this standard addresses heat resistant ethylene-vinyl acetate (EVA) rubber insulated cables, laying out their particular requirements in addition to the general requirements of IEC 60245-1. This standard is essential for manufacturers, designers, specifiers, and quality assurance teams working with electric cables in environments where heat resistance and reliable electrical insulation are required.

The 2026 edition features notable updates, including the use of IEC 63294 for cable testing in place of the previous reference to IEC 60245-2, and updated normative references to ensure current best practices.

Key Topics

• Cable Types Covered:

  • Single-core, non-sheathed cables utilizing heat resistant ethylene-vinyl acetate rubber or equivalent synthetic elastomers.
  • Applications for both 450/750 V and 300/500 V rated voltages.
  • Conductor classifications aligned with IEC 60228 (solid, stranded, flexible).

• Heat Resistance:

  • Designed for environments with conductor temperatures up to 110°C.
  • Suitable for use in areas subject to elevated operating temperatures, such as internal wiring of electrical apparatus.

• Testing and Compliance:

  • Electrical and mechanical properties must be verified using methods specified in IEC 63294 and related IEC 60811 series standards.
  • Conformance testing includes resistance, insulation, tensile properties, hot set tests, and pressure tests at high temperatures.
  • Markings on cables must include code designation or maximum conductor temperature for identification and traceability.

• Constructional Requirements:

  • Precise prescriptions for conductor material and class, insulation material (IE3 type rubber compound), and layup.
  • Dimensional and performance criteria for insulation thickness, overall diameter, and insulation resistance.

Applications

IEC 60245-7:2026 cables are widely used in sectors where internal wiring in electrical equipment may be exposed to high ambient or operating temperatures. Common practical applications include:

• Electrical Apparatus and Machinery: Utilized for internal connections in equipment where conventional cables may degrade due to heat.
• Industrial Controls: Ideal for control panels and instrumentation in industrial environments.
• Lighting and Heating Systems: Suitable for fixtures or appliances subjected to high thermal loads.
• Household and Professional Devices: Used where added heat resistance and flexibility are required for long-term reliability.

The cables are intended to promote safety, minimize maintenance, and ensure consistent performance in environments that demand robust, heat-resistant insulation.

Related Standards

IEC 60245-7:2026 is part of a broader suite of IEC standards governing rubber insulated cables and electrical safety. Key related standards include:

• IEC 60245-1: General requirements applicable to all cables in the IEC 60245 series.
• IEC 60228: Specifies requirements for conductors of insulated cables.
• IEC 63294: Details test methods for electric cables with rated voltage up to and including 450/750 V.
• IEC 60811 Series: Comprehensive test methods for non-metallic materials used in cables (thermal ageing, mechanical properties, and more).
• IEC 62440: Provides guidance on the safe use of electric cables with rated voltage not exceeding 450/750 V.

Understanding and applying these related standards ensures comprehensive compliance, high safety standards, and optimal cable performance.

Keywords: IEC 60245-7:2026, heat resistant rubber insulated cables, ethylene-vinyl acetate insulated cables, electrical cable standards, high temperature cables, IEC cable testing, internal wiring, electric safety standards, IEC 60245 series.