ISO 6469-3-2021 PDF

Full title and description

ISO 6469-3:2021 — Electrically propelled road vehicles — Safety specifications — Part 3: Electrical safety. This part sets electrical safety requirements for voltage class B circuits in electric propulsion and conductively connected auxiliary systems, addressing protection of persons from electric shock and thermal incidents on electrically propelled road vehicles.

Abstract

This standard specifies electrical safety requirements and test criteria for voltage class B electric circuits used in propulsion and related conductively connected systems of electrically propelled road vehicles. It focuses on protecting people from electric shock and thermal hazards. It does not provide comprehensive safety procedures for manufacturing, maintenance or repair personnel and complements other parts of ISO 6469 and related standards that cover post-crash, charging and wireless power transfer considerations.

General information

• Status: Published
• Publication date: October 28, 2021 (Edition 4, 2021-10)
• Publisher: International Organization for Standardization (ISO)
• ICS / categories: 43.120 (Electric road vehicles)
• Edition / version: Edition 4 (2021)
• Number of pages: 24

Scope

ISO 6469-3:2021 applies to electrical safety of voltage class B circuits in electric propulsion systems and conductively connected auxiliary electric systems of electrically propelled road vehicles. It defines requirements and test methods to protect persons against electric shock and thermal incidents. The document excludes comprehensive safety guidance for manufacturing, maintenance and repair personnel and refers readers to other standards for post-crash electrical safety, conductive external connections, wireless power transfer, and rules for motorcycles and mopeds.

Key topics and requirements

• Requirements for protection against electric shock and thermal incidents in voltage class B circuits (including subclasses B1 and B2).
• Insulation rules (basic, double, reinforced) and criteria for insulation integrity and isolation resistance.
• Design and performance expectations for protective barriers and enclosures, including mechanical robustness and durability over vehicle service life.
• Requirements for conductive protective barriers/enclosures with equipotential bonding.
• Connector design and safety, short-circuit and overcurrent considerations, and protective measures for energized parts.
• Fault protection principles and testing under single-fault conditions.
• Thermal hazard mitigation and verification (testing for hot-spot and thermal propagation risks in electrical components).
• Requirements for marking, warnings and information relevant to electrical safety for users and emergency responders (within the limits of the document).
• References and interfaces to related standards covering post-crash safety, conductive charging and wireless power transfer.

Typical use and users

Used by vehicle manufacturers (OEMs), electrical and safety engineers, certification and testing laboratories, component suppliers (battery, power electronics, connectors), regulatory authorities, and standards bodies. It is applied during vehicle and component design, safety assessments, type approval and laboratory testing to demonstrate compliance with internationally recognized electrical safety criteria for electrically propelled road vehicles.

Related standards

ISO 6469 series (notably ISO 6469-1:2019 for rechargeable energy storage systems and ISO 6469-2:2022 for vehicle operational safety, plus ISO 6469-4 for post-crash electrical safety), ISO 17409 (conductive external charging safety), ISO 19363 (magnetic-field wireless power transfer), and the ISO 13063 series for motorcycles and mopeds. Other referenced IEC and ISO documents provide supporting definitions and test methods.

Keywords

electrically propelled road vehicles, electrical safety, voltage class B, insulation, protective barrier, equipotential bonding, connectors, fault protection, thermal incidents, RESS, vehicle safety

FAQ

Q: What is this standard?

A: ISO 6469-3:2021 is Part 3 of the ISO 6469 series and specifies electrical safety requirements for voltage class B circuits in electrically propelled road vehicles to protect people from electric shock and thermal hazards.

Q: What does it cover?

A: It covers design principles, required protective measures (insulation, barriers, enclosures, equipotential bonding), test criteria and performance expectations for propulsion and conductively connected auxiliary electrical systems in voltage class B. It does not give exhaustive procedures for manufacturing or repair personnel and complements other standards for charging, post-crash and wireless charging safety.

Q: Who typically uses it?

A: Vehicle OEMs, powertrain and battery suppliers, safety and compliance engineers, test laboratories, certification bodies, and regulators use the standard for design verification, testing and demonstrating compliance with international electrical safety expectations.

Q: Is it current or superseded?

A: The standard was published in October 2021 (Edition 4). As of March 2, 2026, ISO 6469-3:2021 remains the published edition; the ISO lifecycle information indicates the document was listed as "to be revised" following review activity (review stage entry dated 30 August 2024) and a committee draft for revision (ISO/CD 6469-3) has been recorded as under development. Users should check current national/adopted versions and any amendments before relying on a specific regulatory or procurement requirement.

Q: Is it part of a series?

A: Yes — ISO 6469-3 is part of the ISO 6469 family addressing safety of electrically propelled road vehicles. Other parts include ISO 6469-1 (rechargeable energy storage systems), ISO 6469-2 (vehicle operational safety) and ISO 6469-4 (post-crash electrical safety).

Q: What are the key keywords?

A: Electrical safety, voltage class B, insulation, equipotential bonding, protective barrier, thermal incidents, connectors, fault protection, RESS, electrically propelled vehicles.