AP 242 Edition 2 has enhanced functionalities for Electrical Harness interoperability

The objective of this page is to provide an overview of the enhanced functionalities of AP242 edition 2 in development for Electrical Harness interoperability. It is summed up according to the following paragraphs:

  • Overview and illustration of capabilities
  • Examples of associated use cases
  • Dependencies / related standards
  • Status of development
  • Status of prototyping in COTS solutions
  • Planning of recommended practices / implementers forums
  • Planned extensions of Electrical domain in AP242 Edition 3

Overview and illustration of capabilities

The European industries have developed between 1995 and 2000, the standard AP 212 “Electrotechnical design and installation”. Despite some successful implementations in certain domains, this standard was not maintained, judged as relying on too much generic information, complex to be implemented. As a result, there is no ISO standard used as the reference for interoperability of wiring and electrical harness design information. AP 242 ed2 aims to close this gap.
The proposed extensions of AP 242 ed2 to Electrical wiring and harness design cover the following functionalities (see White Paper for more details):

  • Physical electrical harness model for design and construction,
  • Electrical functional connectivity information.

It covers the information needed for the design and manufacturing of the harness (harness topology, connectors, terminals, contacs, wires, cables protections, backshells, supports…)

It is fully integrated with AP242 ed2 PDM & geometric data model: it reuses concepts as assembly structure, part, occurrence, mating, topology, shape & representation. .

Example of associated use cases

  • Exchange of Electrical Harness information to harness manufacturer for manufacturing
  • Exchange of design information between Functional and Physical tool to insure the consistency of the design
  • Migration of Electrical Harness Design from a tool to another (CAD tool, Data base…)
  • Long term archiving of Electrical Harness design semantic data (for certification, maintenance, support in operation…)

Example of associated test cases



Dependancies / related standards

STEP AP 210 “Electronic assembly, interconnect, and packaging design”

IEC 600050 International Electrotechnical Vocabulary:

  • Part 151: Electrical and magnetic devices
  • Part 212: Electrical insulating solids, liquids and gases
  • Part 442: Electrical accessories
  • Part 461: Electrical cables
  • Part 581: Electromechanical components for electronic equipment
  • Part 731: Superconductivity

Status of development

Electrical Harness extension is already part of AP242 ed2 "Committee Draft" and will be part of AP242 ed2 "Draft International Standard".

 Tutorial V1.1 based on "Committe Draft" version is available since July 2016. Version 2 based on DIS is in preparation: input for future recommended practices.


Status of prototyping in COTS solutions

  • Core Technologie pilot (CATIA V5 => STEP AP242 ed2 xml => CATIA V5) development on going
  • Datakit pilot (UG-NX => STEP AP242 ed2 xml => UG-NX) development on going 

Planned extensions for Electrical domain in AP242 Edition 3

  • Equipotential / signal concepts
  • Functional information logical link, function, net...
  • EWIS requirements, saferty rules
  • Electrical librairies
  • Optical fiber specificities
  • Manufacturing process (form board...)