IEC 60695-11-10:2013

Overview

IEC 60695-11-10:2013 is an international standard published by the International Electrotechnical Commission (IEC) that specifies small-scale laboratory test methods for evaluating the fire hazard properties of materials used in electrotechnical products. This standard focuses on test flames with a nominal thermal power of 50 watts applied in both horizontal and vertical orientations. It covers two key test methods aimed at determining how materials burn and whether they self-extinguish when exposed to a controlled ignition source.

This standard applies to solid and cellular materials having an apparent density greater than 250 kg/m³ as defined in ISO 845. It serves as an essential reference for manufacturers, safety engineers, and testing laboratories seeking to assess and compare the burning behavior of materials under standardized conditions.

Key Topics

• Test Methods

  • Method A (Horizontal Burning Test): Measures the linear burning rate of a material when exposed horizontally to a 50 W flame.
  • Method B (Vertical Burning Test): Evaluates whether a material self-extinguishes when exposed vertically to a 50 W flame.

• Test Specimen Requirements
  Specimens must meet specific dimensional and conditioning criteria to ensure consistent test results, including details on preparation, thickness tolerances, and specimen orientation.

• Apparatus Specifications
  Describes the necessary equipment such as laboratory fume hood, burner, support fixtures, timing devices, and conditioning ovens to maintain controlled testing environments.

• Conditioning Procedures
  Guidance on pre-test conditioning for both specimens and auxiliary materials like cotton pads to ensure repeatability and accuracy.

• Classification and Reporting
  Outlines classification criteria for test outcomes, including the linear burning rate percentages and afterflame times, as well as standardized reporting methods to document results comprehensively.

Applications

IEC 60695-11-10:2013 test methods are widely used in the electrotechnical industry for fire hazard assessments of components, materials, and assemblies. Key practical applications include:

• Material Development and Selection
  Enables design engineers to select materials with optimal fire performance characteristics for use in electrical and electronic devices.

• Quality Control and Regulatory Compliance
  Assists manufacturers in meeting safety standards and regulatory requirements by providing benchmark test results for flammability.

• Safety Evaluation in Product Design
  Facilitates risk assessment by determining materials’ burning behavior and self-extinguishing properties, critical for preventing fire incidents.

• Research and Development
  Provides standardized test data essential for developing new flame-retardant materials and assessing the effectiveness of fire retardants.

Related Standards

To ensure comprehensive fire hazard assessment, IEC 60695-11-10:2013 should be used in conjunction with other related standards, including:

• IEC 60695-11-4:2011 - Test flames with different nominal power for assessing ignition sources.
• ISO 845 - Methods to determine apparent density of cellular plastics and materials, relevant for specimen preparation.
• IEC 60695 Series - A broader collection of standards covering various fire hazard testing methods in electrotechnical applications.

Understanding and implementing IEC 60695-11-10:2013 alongside these standards ensures rigorous fire safety evaluations and supports industry best practices in reducing fire risks associated with electrical and electronic products.

Keywords: IEC 60695-11-10, fire hazard testing, 50 W flame test, horizontal burning test, vertical burning test, self-extinguishing properties, electrotechnical materials, flammability testing, fire safety standard, material fire behavior