IEC 60917-1:2019

Overview

IEC 60917-1:2019 - "Modular order for the development of mechanical structures for electrical and electronic equipment practices - Part 1: Generic standard" - defines the modular order and terminology for mechanical structures used in electrical and electronic equipment. This edition (2.0, 2019) updates the 1998 edition and aligns modular dimensional interfaces and terminology used for racks, subracks, chassis, enclosures and IT cabinets. The standard clarifies how mechanical structures should be dimensionally coordinated so that components and assemblies are mechanically compatible across installations.

Key topics and technical requirements

• Modular order and dimensional coordination
  • Defines relationships between equipment practices and the modular grid, pitches and coordination dimensions used for mechanical compatibility.
  • Describes how to partition mounting pitches and co‑ordinate interfaces between adjacent technical fields.
• Terminology for parts and assemblies
  • Establishes consistent terms for racks, cabinets, cases, subracks, plug‑in units, panels and other mechanical elements to reduce ambiguity in specifications and designs.
• Integration with verification and testing
  • Links mechanical structure design to environmental performance verification, safety aspects and thermal performance/thermal management requirements.
  • Identifies relevant performance test standards to use when verifying environmental and safety behaviors of mechanical structures.
• Guidance for new standards
  • Provides background for preparing sectional and detail specification standards based on the generic modular order.
• Illustrations and examples
  • Contains figures and examples showing grid layouts, mounting pitches and typical applications to support practical implementation.

Practical applications and who uses this standard

IEC 60917-1:2019 is intended for professionals and organizations involved in the design, manufacture, procurement and testing of mechanical structures for electrical and electronic systems, including:

• OEM mechanical and electrical engineers designing racks, enclosures and IT cabinets
• Product managers and spec writers creating dimensional and interface specifications
• Test laboratories performing environmental, safety and thermal verification
• Systems integrators and data center planners ensuring mechanical compatibility
• CAD/CAE teams and manufacturers implementing modular design rules

Benefits include improved interoperability, easier integration of plug‑in units and assemblies, and a standardized basis for thermal and environmental testing strategies.

Related standards

• IEC 60917 series (detail specification standards)
• IEC 60297 series (19 in. rack/subrack standards)
• IEC 61587 series (environmental/mechanical performance tests)
• IEC 61969 series (outdoor applications)
• IEC 62194, IEC 62610 (thermal performance and thermal management)
• IEC Guide 103 (dimensional systems and recommendations)

Keywords: IEC 60917-1:2019, modular order, mechanical structures, IT cabinets, dimensional coordination, thermal management, environmental verification.