Switchgear, Panelboards & Electrical Distribution worked example
Wire Duct Fill at 65% wireway routing efficiency: a worked example
This worked example runs the wire duct fill numbers for a tougher week than the baseline: 65% wireway routing efficiency instead of the typical 90%. Wire duct fill throughput measures how much slotted wireway a panel shop actually lays up and dresses per hour once real-world routing losses are factored in.
The inputs for this scenario
- Feet of wire duct laid up per shift: 1,200 units (held at the documented default)
- Assembly shift length: 8 hr (held at the documented default)
- Wireway routing efficiency: 65 % (the input this scenario stresses; the baseline uses 90)
Working through the calculation
- The calculation starts from the formula this tool documents: Raw wire duct fill = completed output รท runtime.
- Effective throughput works out to 97.5 units at these inputs, and this is the headline figure for the scenario.
- Raw throughput works out to 150 units at these inputs.
- Efficiency works out to 65 % at these inputs.
- Runtime works out to 8 hr at these inputs.
How this compares with the baseline
- Against the tool's baseline example, where wireway routing efficiency sits at 90% and the headline result is 135 units, this scenario comes in 27.78% below the baseline at 97.5 units.
- Use it when scheduling the wiring phase of a panel build, sizing the wireman crew, or setting standard times for repeat switchgear assemblies. A result at this level usually justifies acting on the stressed input before touching anything else, because every other figure in the table is downstream of it.
Results at a glance
- Effective throughput: 97.5 units (headline result)
- Raw throughput: 150 units
- Efficiency: 65 %
- Runtime: 8 hr
Run it with your numbers
- To rerun this with your own numbers, open the live Wire Duct Fill calculator, set wireway routing efficiency to your actual value, and adjust the remaining inputs to match your operation.
Last reviewed 2026-05-12.