Switchgear, Panelboards & Electrical Distribution calculator
Documentation Labor Calculator
Documentation Labor is the engineering and drafting cost baked into every switchgear lineup, panelboard schedule, and electrical distribution submittal package you produce. Application engineers, detailers, and project estimators use it to price the shop drawings, wiring diagrams, nameplate schedules, and as-built revisions that UL 891 and customer approval cycles demand. On custom switchgear jobs this labor is easy to underquote because it hides behind copper and steel, yet a single lineup can consume dozens of drafting hours across initial submittal and revision rounds. This calculator turns package count, drafting rate, and how much of that time you actually bill into a defensible cost number.
What this calculator does
- Documentation Labor is the engineering and drafting cost baked into every switchgear lineup, panelboard schedule, and electrical distribution submittal package you produce.
- Use it when documentation labor in switchgear, panelboards and electrical distribution is being put through a switchgear, panelboards and electrical distribution weighted-cost review.
- It computes total documentation labor cost as packages produced times drafting rate times billable capture rate, plus a fixed setup cost, and divides by package count for a per-package figure.
Formula used
- Documentation Labor cost = quantity × rate × capture factor + fixed cost
- Per-unit documentation labor = total cost ÷ quantity
Inputs explained
- Drawings and submittals produced:
- Drafting labor rate per submittal package:
- Billable documentation capture rate:
- Fixed submittal setup and archival cost:
How to use the result
- Use it when quoting a switchgear or panelboard job and you need to isolate the drafting and submittal effort from fabrication cost, or when reconciling engineering hours against a completed project.
- It models labor as a flat rate per package and does not account for revision cycles that spiral on approval-heavy utility or spec-driven jobs, so pad the capture rate down for customers with many comment rounds.
Current U.S. benchmarks
- The producer price index for copper and brass mill shapes stands at 559.593 (BLS, May 2026), up 76.8% from a year earlier. Quotes priced off last quarter's material cost miss this move. Global copper trades at $13,484 per tonne (IMF via FRED, May 2026).
- Industrial electricity averages 8.66 cents per kWh across the U.S. (EIA, Apr 2026), up 5.5% from a year earlier. Energy-intensive steps carry this directly into unit cost.
- On-highway diesel averages $4.58 per gallon this week (EIA), trending down over recent periods. Truck tonnage is up 3.4% year over year (ATA via FRED).
- The U.S. has 21,668 machinery manufacturing establishments employing about 1,086,146 workers (Census County Business Patterns, 2023).
Common questions
- How do you calculate documentation labor for a switchgear submittal? Multiply the number of drawing or submittal packages by your loaded drafting rate, multiply by the fraction of that time you can actually bill, then add fixed setup cost. With 100 packages at $45, an 80% capture rate, and $250 fixed, the total is $3,850 or $38.50 per package.
- What is a good documentation capture rate for electrical distribution work? Established switchgear shops running templated UL 891 details often bill 80-90% of drafting time; custom or first-article jobs with heavy customer markup rounds can drop below 60%. Below 50% usually signals scope creep in the approval cycle.
- Why include a fixed submittal cost separate from per-package labor? Title blocks, revision-control setup, and final archival happen once per project regardless of how many sheets you draw. Breaking out the $250 fixed cost keeps your per-package rate honest across small and large lineups.
- How does documentation labor differ from option complexity cost? Documentation labor prices the drafting and submittal effort; option complexity cost prices the engineering and BOM impact of added features. A job can have simple options but heavy documentation, or vice versa, so track them separately.
- Should as-built revisions be counted as documentation labor? Yes. As-builts, red-line incorporation, and O&M manual assembly are documentation labor. On approval-driven jobs they can equal or exceed initial submittal time, so include them in your package count or lower the capture rate.
Last reviewed 2026-05-12.