Wire Harness Assembly Standards: IPC/WHMA-A-620C Apr 17, 2019Following IPC Wire Harness Assembly Standards offers tremendous benefits for Wire Harness Manufacturers. The Wire Harness Manufacturer’s Association and the IPC (Association Connecting Electronics Industries) combined forces to create the “IPC/ WHMA-A-620A Requirements and Acceptance for Cable and Wire Harness Assemblies” which is an amazing resource for Wire Harness [PDF] AN INTRO TO Wiring Harnesses - interconnect-wiring •Likewise, the marking on a wire/cable is uniquely identified. SAE AS50881 describes how a wire should be identified and marked. A wire identifier contains: 1) The circuit function letter 2) The wire number 3) The segment letter 4) The wire gauge. Example: P215A4 is a single conductor wire. •There is an alternative method for identifying wire.