cable tolerances
cable tolerances
(OP)
I have a cable that is called out as 5.50" long, with our standard title block stating the standard tolerance for two digits is 0.01 (5.50+/-0.01").
When my QC inspects the cables I told them that +/-0.25" is acceptable for this cable. Is there a standard for cabling to define the design tolerance and the acceptance tolerance, or should I not be so hard on my shop? If not, what standard should I hold them to for an industrial application?
John D
When my QC inspects the cables I told them that +/-0.25" is acceptable for this cable. Is there a standard for cabling to define the design tolerance and the acceptance tolerance, or should I not be so hard on my shop? If not, what standard should I hold them to for an industrial application?
John D





RE: cable tolerances
If you force them to reach 10mil tolerances on cabling, you would need to specify if that includes the end of the connectors, just the shielded portion, etc. Also expect some seriously disgruntled workers short-changing you on a random cable, like cutting the shield back too far waiting for a break to happen in the field, etc.
Dan - Owner

http://www.Hi-TecDesigns.com
RE: cable tolerances
First view would show the raw cable, cut to length, stripped and prepared ends. This could easily have ±0.25-inch tolerance on the overall length (as assembly guidance, not a QA requirement). Then show the final product with slightly wider tolerances such as ±0.50-inch (a QA requirement).
You might need to put a diagonal line through the default tolerances in the title block of your drawing, unless there's already a "unless otherwise indicated" note.
RE: cable tolerances
John D