Wire, Cable & Conductor Manufacturing worked example

Shield Coverage at 61% braiding and serving transfer efficiency: a worked example

Here is what the math looks like when conditions slip. We hold every other input steady and drop braiding and serving transfer efficiency to 61%, then walk the calculation through step by step. Shield Coverage sizes how much braid, foil, or serve wire you must feed to shield a given length of cable once real-world transfer efficiency is factored in.

The inputs for this scenario

  • Cable length to be shielded: 500 units (held at the documented default)
  • Shield material used per unit length: 0.08 units (held at the documented default)
  • Braiding/serving transfer efficiency: 61 % (the input this scenario stresses; the baseline uses 85)

Working through the calculation

  • The calculation starts from the formula this tool documents: Required shield coverage = covered amount × use per unit ÷ transfer efficiency.
  • Required quantity works out to 65.57 units at these inputs, and this is the headline figure for the scenario.
  • Theoretical amount works out to 40 units at these inputs.
  • Loss allowance works out to 25.57 units at these inputs.
  • Efficiency works out to 61 % at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where braiding and serving transfer efficiency sits at 85% and the headline result is 47.06 units, this scenario comes in 39.34% above the baseline at 65.57 units.
  • The practical read: the gap between this scenario and the baseline is entirely attributable to braiding and serving transfer efficiency, so recovering it is worth quantifying in dollars before considering equipment or staffing changes. It assumes a single efficiency value; it does not resolve carrier angle, picks-per-inch, or overlap that cause coverage to vary along the cable.

Results at a glance

  • Required quantity: 65.57 units (headline result)
  • Theoretical amount: 40 units
  • Loss allowance: 25.57 units
  • Efficiency: 61 %

Run it with your numbers

  • To rerun this with your own numbers, open the live Shield Coverage calculator, set braiding and serving transfer efficiency to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.