Overview
IEC 60364-7-717:2026 specifies the safety requirements for low-voltage electrical installations in mobile units and transportable units. Developed by the International Electrotechnical Commission (IEC), this standard addresses the unique risks associated with electrical systems in units designed to be moved, such as containers for office use, temporary dwellings, emergency vehicles, and outside-broadcast vans. The third edition represents a significant technical revision, reflecting updated industry practices and harmonizing with changes in associated standards.
The scope of IEC 60364-7-717:2026 covers all electrical installations in mobile or transportable units but excludes generating sets, pleasure craft, caravans, motor caravans, and automotive electrical equipment.
Key Topics
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Protection Against Electric Shock
The standard defines enhanced measures, including automatic disconnection of supply and additional RCD (residual current device) protection for final circuits and socket outlets. It requires that metallic chassis and frames are properly bonded to the main earthing terminal.
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Overvoltage Protection
Requirements for protection against transient overvoltages caused by atmospheric and switching phenomena are included, mandating surge protective devices (SPDs) suited to the installation and connection type.
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Selection and Installation of Equipment
Guidelines on cable types, wiring systems, and the installation of electrical components ensure safety and resilience against external influences such as moisture (IPX4 rating minimum for outdoor use), solid objects, and mechanical impact (IK08 for public areas).
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Earthing and Bonding
The standard clarifies earthing practices in mobile and transportable units, including requirements for accessible earth connections and the selection of protective bonding conductors (Class 5 flexible conductors).
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Labelling and Identification
Units must include clear, durable notices with information about supply types, voltage ratings, wiring configuration, and earthing arrangements to support safe operation and maintenance.
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Special Provisions
The document provides recommendations for the installation of ELV (extra-low voltage) equipment in hazardous areas (e.g., gas cylinder compartments) and requires protection against ignition sources.
Applications
IEC 60364-7-717:2026 is essential for:
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Manufacturers and installers of mobile or transportable units
Ensuring compliance throughout the design, installation, and maintenance of electrical systems in modular offices, clinics, broadcasting units, catering vehicles, and similar applications.
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Event and temporary facility providers
Guaranteeing that temporary structures with electrical installations meet robust safety criteria for both indoor and outdoor use.
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Inspection bodies and regulatory authorities
Verifying conformity with international requirements for equipment protection against water, dust, and mechanical stress, as well as adherence to effective bonding and earthing.
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Owners and operators of specialized vehicles and modular units
Supporting safe operations and ease of disconnection, relocation, or modification under varying supply and environmental conditions.
This standard underscores safety and reliability in dynamic environments where quick setup and frequent movement of electrical units can introduce additional hazards and operational challenges.
Related Standards
- IEC 60364 Series – General requirements for low-voltage electrical installations
- IEC 60364-4-41 – Protection against electric shock
- IEC 60364-4-44 – Protection against voltage disturbances and electromagnetic disturbances
- IEC 60364-5-51, -52, -53, -54, -55 – Selection and erection of electrical equipment
- IEC 60529 – Degrees of protection provided by enclosures (IP code)
- IEC 62262 – Degrees of protection against mechanical impacts (IK code)
- IEC 61558-2-4 – Isolating transformers for general applications
For best results, the requirements of IEC 60364-7-717:2026 should be applied in conjunction with these related standards, ensuring comprehensive electrical safety in mobile and transportable units.
Open preview (PDF)Low-voltage electrical installations - Part 7-717: Requirements for special installations or locations - Mobile or transportable units
