Project estimator
Vehicle builds: what the job needs
Restomods, race cars, trucks, buses, EV conversions, trailers, RVs, equipment
Custom and small-run vehicle builds. We start from a typical harness for the vehicle type and multiply by how many you're building.
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How this estimate works
Each quantity comes from a stated rule of thumb applied to your answers. For a typical vehicle builds (1 × car or light truck build), these are the rules and the items they point to:
- NR-4x200 Harness tie, 40 lb, 7.9 in, 3.5 mm wide
- Harness branches and loom: 150 per vehicle
- NR-8x300 Heavy-duty nylon tie, 120 lb, 11.8 in (300 mm)
- Bundles under the dash and in the engine bay: 40 per vehicle
- NR-1/2R R-type cable clamp, 1/2 in (12.7 mm) cable, 12 mm wide
- Clamping runs along the frame: 25 per vehicle
- NR-4.8x160PT Push-mount tie, 6.3 in, 1.5 in max bundle
- Harness fixing to body panels: 30 per vehicle
- NR-TM-25 Adhesive tie mount, 25 × 25 mm base, 6.2 mm tie slot
- Fixing where you can't drill: 15 per vehicle
- NR-CT15.8 Corrugated conduit, 12.0 mm inside dia., 15.8 mm outside dia., 100 m roll
- Corrugated loom, feet: 60 per vehicle
- NR-DRS-6 Heat shrink tubing 2:1, 6 mm (1/4 in), 100 m roll
- Heat shrink on splices and pins, feet: 25 per vehicle
- NR-KY-2 Heat-shrink butt connector, 16 to 14 AWG, blue
- Sealed butt splices: 30 per vehicle
- NR-FDD2-250 Quick disconnect, female, 16 to 14 AWG, .250 in tab
- Quick disconnects for lamps, switches and relays: 25 per vehicle
- NR-RV5.5-6 Ring terminal, 12 to 10 AWG, 1/4 in stud, yellow
- Ring terminals, heavier circuits: 10 per vehicle
- NR-RVS2-5 Ring terminal, 16 to 14 AWG, #10 stud, blue
- Ring terminals, grounds and studs: 30 per vehicle
- NR-SC25-8 Copper tube lug, 25 mm², 5/16 in stud
- Battery and starter cable lugs: 6 per vehicle
We add 10% for waste and offcuts, round up to whole packs of 100 and whole rolls, and show a low to high range because real jobs vary with routing, spacing and spec. Your drawings and spec sections beat any rule of thumb: send them with your quote request and we'll price from them.