EV Charging Infrastructure Manufacturing worked example

Cable Harness Labor at 13% cable handling and test allowance: a worked example

Here is what the math looks like when conditions slip. We hold every other input steady and drop cable handling and test allowance to 13%, then walk the calculation through step by step. Estimate labor hours for EV charger cable harness, connector, and charging cable assembly work.

The inputs for this scenario

  • Cable or harness assemblies to build: 120 assemblies (held at the documented default)
  • Harness assembly rate: 10 assemblies / hr (held at the documented default)
  • Cable handling and test allowance: 13 % (the input this scenario stresses; the baseline uses 18)

Working through the calculation

  • The calculation starts from the formula this tool documents: Base harness labor hours = cable or harness assemblies รท harness assembly rate.
  • Required cable harness labor hours works out to 13.56 hr at these inputs, and this is the headline figure for the scenario.
  • Base cable harness labor hours works out to 12 hr at these inputs.
  • Cable handling and test allowance works out to 13 % at these inputs.
  • Harness assembly rate works out to 10 assemblies / hr at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where cable handling and test allowance sits at 18% and the headline result is 14.16 hr, this scenario comes in 4.24% below the baseline at 13.56 hr.
  • The practical read: the gap between this scenario and the baseline is entirely attributable to cable handling and test allowance, so recovering it is worth quantifying in dollars before considering equipment or staffing changes. It assumes a steady build rate, so it will understate hours if your harness mix includes high-mix, low-volume variants that slow operators between changeovers.

Results at a glance

  • Required cable harness labor hours: 13.56 hr (headline result)
  • Base cable harness labor hours: 12 hr
  • Cable handling and test allowance: 13 %
  • Harness assembly rate: 10 assemblies / hr

Run it with your numbers

  • To rerun this with your own numbers, open the live Cable Harness Labor calculator, set cable handling and test allowance to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.