JEFA Tech follows the IPC/WHMA-A-620C Standard for cable assembly length tolerances. This standard answers the question "how much should a cable vary in length and what is acceptable?"
The IPC/WHMA-A-620C Standard gives a well-defined tolerance and gives assemblers a reasonable amount of area to work within as shown below. This also sets expectations for customers and cable installers.
| Cable Length | Minimum tolerance (allowable shorter than requested length) | Maximum tolerance (allowable longer than requested length) |
| Less than 1ft | 0" | 1" |
| 1ft to 5ft | 0" | 2" |
| 5ft to 10ft | 0" | 4" |
| 10ft to 25ft | 0" | 6" |
| more than 25ft | 0" | 5% |
In other words, a cable assembly should be no shorter than the requested length and has room to be longer than specified within a certain tolerance.
The cable length is measured end-to-end which includes the connector.
If there is an engineering drawing that includes specific tolerances that are more specific than the standard, then the drawing is used as the production guide and supersedes the standard. Such drawings or requests require a specific part number to be generated to track production and QA processes. Contact us for details.