Branch-Circuit Conductor Footage Takeoff
Takes off the branch-circuit wire to order and how many rolls.
Example
You enter
- Number of branch circuits 20
- Average home-run length (ft) 45
- Box makeup / slack per circuit (ft) 15
- Conductors per circuit (1 for cable) 3
- Roll / spool length (ft) 1000
You get
- Total conductor footage 3600 ft
- Rolls per color 4
Details, formula, and sources
total = circuits x (home run + makeup) x conductors; rolls = ceil(total / roll length). 20 circuits at a 45 ft average home run, three conductors each, with 15 ft of box makeup, is 3,600 ft - 4 thousand-foot rolls per color. Set conductors to 1 for cable (NM / romex). The panel schedule drives the count; wire is bought per color.
total_ft = circuits x (avg_homerun_ft + makeup_ft) x conductors_per_circuit; rolls = ceil(total_ft / roll_ft).
Branch-circuit footage takeoff identity by name (circuits x per-circuit length x conductors; rolls from total / roll); first-principles count arithmetic.
The footage takeoff is public quantity arithmetic; the circuit count and home runs come from the panel schedule and the plan.
Estimate. AHJ and licensed professional govern.
Field names used by the API: circuits, avg_homerun_ft, makeup_ft, conductors_per_circuit, roll_ft, total_ft, rolls
- Per-circuit length average home-run length plus box makeup/slack; the panel schedule and plan governpanel schedule / plan
- Conductor count conductors per circuit for conduit (e.g. hot/neutral/ground = 3), or 1 for cablewiring method