Accubid and Trimble are the two estimating platforms most electrical contractors run. If you already own a license, the bottleneck is rarely the software — it is the takeoff feeding it. We produce that takeoff. You send the electrical drawings, the spec book, and any panel schedules or fixture schedules you have. We return quantities by CSI MasterFormat division, with a marked-up plan set so your estimator can audit every count.
- Deliverable
- Excel estimate + marked-up PDF plans
- Organized by
- CSI MasterFormat section
- Turnaround
- 24–48 hours for most projects
- Pricing
- ZIP-code-adjusted material and labor pricing
- Software
- Bluebeam Revu, PlanSwift, RSMeans data
The deliverable is organized to match how Accubid and Trimble jobs are built: raceway by type and size, conductors by size and count, boxes by type, devices, fixtures, panelboards, and equipment. Each line carries a unit that maps to a database item — LF for conduit and wire, EA for devices and equipment, LB for support systems, HR for labor. If your database uses assemblies, we can group the takeoff so a single assembly line pulls the conduit, wire, boxes, and fittings together.
We work in Bluebeam Revu and PlanSwift for the takeoff itself, with RSMeans data and ZIP-code-adjusted material and labor pricing behind the numbers. Most projects turn in 24–48 hours; rush is available. If you are comparing platforms, our Estimating Software We Work In page covers how we split work between Bluebeam Takeoff Services and PlanSwift Takeoff Services. For residential service work priced in Xactimate instead, see Xactimate Estimating Services.
As an electrical estimating company, we also handle outsourced electrical estimating when your team is at capacity. We can work directly from a bid package, log every RFI, and return an electrical estimate for contractors that is ready to price in Accubid or Trimble. If you need a second set of eyes on a commercial electrical estimating bid, or you are still deciding which electrical estimating software fits your shop, send the drawings and we will confirm scope before we start.
What the electrical quantity takeoff covers
We take off the electrical scope shown on the drawings and specified in Division 26, 27, 28, and 33. Quantities are measured, not guessed: conduit is scaled and counted by run, wire is derived from conduit fill and home runs, and devices are counted from the floor plans and schedules. Where the spec puts work in another division, we flag it rather than absorb it.
Raceway Takeoff
EMT, IMC, RGC, PVC, and aluminum raceway measured by type and size from 1/2 in through 4 in, including fittings and terminations.
LF · EAConductor & Cable
THHN/THWN-2, XHHW-2, and MC cable counted by conductor size from #12 through 500 kcmil, with home-run lengths and pull points.
LF · EABoxes & Devices
Outlet, switch, and junction boxes, plaster rings, and device plates counted from floor plans and reflected ceiling plans.
EAPanelboards & Switchgear
Panelboards, switchboards, and distribution equipment priced by bus ampacity, main type, branch breaker count, and AIC rating.
EALighting & Controls
Interior and exterior luminaires by type from the fixture schedule, including emergency battery units and control devices.
EAGrounding & Bonding
Ground rods, exothermic connections, grounding electrode conductors, and switchgear ground bars measured from the service and site plans.
EA · LFFire Alarm & Low Voltage
Fire alarm devices, FACP terminal cabinets, and structured cabling (CAT6/CAT6A) horizontal runs, patch panels, and racks.
EA · LFSupport & Firestopping
Strut, hangers, trapeze assemblies at code-required spacing, and firestopping at rated wall and floor penetrations keyed to UL systems.
LB · EAWhat every accubid & trimble electrical estimating takeoff includes
- EMT, IMC, RGC, PVC Schedule 40/80, and EMT-aluminum raceway by size from 1/2 in through 4 in
- THHN/THWN-2, XHHW-2, and MC cable by conductor size from #12 through 500 kcmil
- Boxes, plaster rings, and device rings counted from floor plans and reflected ceiling plans
- Panelboards and switchboards by bus ampacity, main type, branch breaker count, and AIC rating
- Dry-type transformers, including K-rated units where specified for harmonic loads
- Interior and exterior luminaires by type from the fixture schedule, including emergency battery units
- Wiring devices: duplex, GFCI, isolated ground receptacles, switches, and floor boxes
- Grounding and bonding: ground rods, exothermic connections, and switchgear ground bars
- Fire alarm devices and FACP terminal cabinets from Division 28 drawings
- Structured cabling: CAT6/CAT6A horizontal runs, patch panels, and racks
- Conduit support: strut, hangers, and trapeze assemblies at code-required spacing
- Firestopping at rated wall and floor penetrations, keyed to UL systems
How our electrical takeoff services work an Accubid job
- Set up the plan setWe register the electrical sheets, the architectural floor plans, and the RCPs in Bluebeam Revu so counts land on the right sheet. We note the adopted code edition on the cover sheet — IBC, IRC, IECC, NEC, and NFPA 13 editions vary by jurisdiction, so we confirm with the local building department before applying support spacing or firestop rules.
- Count devices and fixturesDevices, fixtures, and equipment are counted first because they anchor the branch circuit takeoff. We count receptacles, switches, floor boxes, and luminaires from the floor plans and RCPs, cross-checking against the panel schedules. Any fixture type on the schedule with no plan symbol gets flagged as a question, not a guess.
- Measure raceway by runConduit is measured run by run, not by total length. We scale each homerun from the panel to the first device, then scale the branch between devices, and record the size and type from the spec. Runs above 2 in are carried explicitly — they are the most common omission when an estimator stops at 2 in.
- Derive conductorsWire is derived from conduit length times conductor count, with slack added at boxes, panels, and terminations. We separate feeders by size — #12 through 500 kcmil — and note where aluminum is permitted above #1/0. Ground conductors are carried separately from current-carrying conductors so the grounding and bonding line stays visible.
- Build the support and underground takeoffSupport is taken off from the code-required spacing for the adopted edition: strut, hangers, and trapeze assemblies by the pound. Underground duct bank is measured by the foot, with PVC, concrete encasement, and pull boxes separated. Equipment pads and floor trench are measured in CY and SF so they can be priced without conversion.
- Map to your databaseBefore we finalize, we map each line to the item or assembly structure your Accubid or Trimble database uses. If your assemblies pull conduit, wire, boxes, and fittings together, we group the takeoff that way. The Extension screen then carries quantities, not descriptions, so your estimator applies labor and pricing on your terms.
What we need from you
- Electrical drawingsPower, lighting, and systems sheets, including the panel schedules and the fixture schedule. Without them we cannot derive homeruns or fixture counts.
- Spec bookDivision 26, 27, 28, and 33 sections. The spec decides raceway type, conductor insulation, and whether firestop is carried by you or the GC.
- Architectural backgroundFloor plans and RCPs at the same scale as the electrical sheets. Device counts are cross-checked against these, not taken from the electrical sheets alone.
- Panel schedulesExisting or proposed. They let us verify circuit counts and breaker sizes, and they catch panelboards that appear on the one-line but not the floor plan.
- Your database structureA sample of your Accubid item or assembly list. This is how we group the takeoff so it re-keys or imports without rework.
- Bid date and formatTell us the bid date and whether you want Excel only or Excel plus a marked-up plan set. Rush turnaround is available for short-fuse bids.
Sample takeoff format for electrical bid estimating
This is the shape of the deliverable. Quantities are illustrative and shown so you can see how each line maps to a CSI section and a sheet reference.
| Section | Line item | Qty | Unit | Ref. |
|---|---|---|---|---|
| 26 05 19 | THHN #12 AWG, 3 conductors per 3/4 in EMT | 55,200 | LF | E-201 |
| 26 05 33 | EMT 3/4 in, concealed above ceiling | 18,400 | LF | E-201 |
| 26 05 33 | 4 in square box, 1-1/2 in deep, with plaster ring | 1,250 | EA | E-202 |
| 26 24 16 | Panelboard 208Y/120V, 42-circuit, 225A bus | 14 | EA | E-601 |
| 26 51 00 | 2x4 LED troffer, 40W, 4000K | 640 | EA | E-301 |
| 28 31 00 | Photoelectric smoke detector, addressable | 96 | EA | E-401 |
| 26 05 26 | Ground rod, 3/4 in x 10 ft, copper-clad | 8 | EA | E-001 |
| 26 05 33 | Strut support, 1-5/8 in x 1-5/8 in, with hangers | 1,200 | LF | E-201 |
| 26 27 26 | Duplex receptacle, 20A, 125V, specification grade | 480 | EA | E-202 |
| 26 28 16 | Safety switch, 100A, 600V, NEMA 3R | 6 | EA | E-601 |
| 26 05 19 | THHN #1/0 AWG, 4 conductors per 2 in EMT | 2,400 | LF | E-601 |
| 26 05 33 | EMT 2-1/2 in, exposed, with couplings and supports | 850 | LF | E-601 |
Units of measure in the electrical takeoff
Every line carries the unit your Accubid or Trimble database expects. Mixing units is the most common cause of a takeoff that will not re-key cleanly.
| Item | Unit | How it's measured |
|---|---|---|
| EMT, IMC, RGC, PVC conduit | LF | Measured along the run centerline, counted by size and support type |
| THHN/THWN-2 and XHHW-2 conductors | LF | Conduit length times conductor count, plus slack at boxes and panels |
| MC cable and CAT6/CAT6A | LF | Measured along the cable path, with service loops at each end |
| Boxes, devices, fixtures, panelboards | EA | Counted from floor plans, RCPs, and schedules; no partial units |
| Conduit and wire support systems | LB | Strut, rod, and hanger weight from the support schedule or spacing |
| Concrete equipment pads | CY | Length times width times thickness divided by 27 |
| Labor by item | HR | NECA/IBEW or RSMeans labor unit applied to the quantity |
Worked example: takeoff of a 120V branch circuit in EMT
The dimensions below are illustrative. We are taking off a single 20A, 120V branch circuit serving six duplex receptacles in an office area. The circuit runs from Panel LP-1 to the first device, then continues device to device. The spec calls for 3/4 in EMT with THHN conductors, concealed above the ceiling.
Step 1 — Measure the homerun. Scale the panel to the first device: 85 ft. This is the homerun. It carries three conductors (hot, neutral, ground).
Step 2 — Measure the branch between devices. Scale device-to-device runs: 22 ft, 18 ft, 25 ft, 15 ft, and 20 ft. Total branch length = 22 + 18 + 25 + 15 + 20 = 100 ft.
Step 3 — Total conduit length. Homerun + branch = 85 + 100 = 185 ft of 3/4 in EMT. This is the measured length. No waste applied yet.
Step 4 — Derive conductor length. Three conductors per conduit. Total conductor length = 185 ft × 3 = 555 ft. Add slack: 2 ft per device box (6 boxes × 2 ft = 12 ft) and 3 ft at the panel = 15 ft total slack. Total conductor length = 555 + 15 = 570 ft of #12 THHN.
Step 5 — Count boxes and devices. Six duplex receptacles = 6 EA. Six 4 in square boxes, 1-1/2 in deep = 6 EA. Six plaster rings = 6 EA. One 3/4 in connector at the panel = 1 EA.
Step 6 — Count support. EMT requires support at intervals per the adopted code edition. For this example, assume supports every 10 ft. 185 ft ÷ 10 = 18.5, round up to 19 supports. Each support is one 1-5/8 in strut clamp with a 3/8 in rod. 19 EA strut clamps and 19 EA rods.
Step 7 — Apply waste as a separate line. Conduit waste: 5% of 185 ft = 9.25 ft, round to 10 ft. Conductor waste: 5% of 570 ft = 28.5 ft, round to 30 ft. Boxes and devices: no waste; count is exact. Support: 5% of 19 = 0.95, round to 1 EA.
Step 8 — Summarize by unit.
| Line item | Qty | Unit |
|---|---|---|
| 3/4 in EMT | 185 | LF |
| #12 THHN | 570 | LF |
| 4 in square box | 6 | EA |
| Duplex receptacle | 6 | EA |
| Plaster ring | 6 | EA |
| Strut clamp | 19 | EA |
| 3/8 in rod | 19 | EA |
| Conduit waste (5%) | 10 | LF |
| Conductor waste (5%) | 30 | LF |
| Support waste (5%) | 1 | EA |
This is the level of detail we carry for every circuit. The quantities map directly to Accubid items or assemblies. For example, an assembly might pull 3/4 in EMT, #12 THHN, boxes, and fittings together. We group the takeoff so your database applies the correct labor unit.
What drives the cost of outsourced electrical estimating
Relative impact on a typical estimate for this trade, based on estimator judgment. Select a bar for details.
Drawing quality
A set with complete panel schedules and a fixture schedule takes less time than one where homeruns are implied. When the one-line and the floor plans disagree, we measure both and flag the difference rather than pick one. Missing panel schedules force us to derive circuit counts from the floor plan, which adds review time and increases the chance of a missed feeder.
A set with complete panel schedules and a fixture schedule takes less time than one where homeruns are implied. When the one-line and the floor plans disagree, we measure both and flag the difference rather than pick one. Missing panel schedules force us to derive circuit counts from the floor plan, which adds review time and increases the chance of a missed feeder.
EMT is the baseline. IMC, RGC, and PVC Schedule 80 carry different labor units and different support requirements, and underground duct bank adds concrete encasement and pull boxes. The mix, not the total footage, drives the takeoff time. A job that is 80% EMT and 20% RGC takes longer per foot than an all-EMT job because each raceway type has its own support spacing and fitting count.
Branch work from #12 through #10 is fast to derive. Feeders from #1/0 through 500 kcmil require separate terminations, lugs, and support, and they are where aluminum-versus-copper decisions get made. Each feeder size change means a different lug kit and a different bending radius, so we count them individually rather than by total conductor length.
A power-and-lighting job is one takeoff. Adding Division 27 structured cabling and Division 28 fire alarm means counting devices, patch panels, and FACP terminal cabinets from separate sheets, which adds time even when the device counts are small. Each system has its own schedule and its own sheet references, so the takeoff grows in line items, not just in quantity.
Most projects turn in 24–48 hours. Rush turnaround compresses the review cycle, so the plan set needs to be complete at kickoff. If sheets arrive in batches, we take off what is issued and flag the rest. A rush job with missing sheets means we either hold the takeoff or issue it with an explicit list of assumptions that your estimator must price as allowances.
Duct bank, manholes, and direct-buried runs are measured separately from above-ceiling raceway. Trench depth, concrete encasement, and pull box sizing all come from the site plan and the details, not the floor plans. If the civil sheets are not issued, we carry the underground scope as an allowance and flag it so you can price it separately.
Switchgear, transformers, and panelboards are counted by bus ampacity, AIC rating, and breaker count. Long-lead equipment adds a pricing escalation risk that the takeoff cannot solve, but we list each item separately so your Change Order module can carry escalation. The more equipment types on the one-line, the more line items we create and the more time the takeoff takes.
Scope gaps we catch in a commercial electrical estimating bid
These are the items that most often fall out of an electrical takeoff. We look for each one in a specific place in the documents.
- Conduit and wire above 2 in. Estimators often stop the size range at 2 in and never pick up the 2-1/2 in through 4 in feeders. We scale every homerun and carry the larger sizes explicitly.
- Grounding electrode system and bonding of metallic water, gas, and structural steel. This hides in Division 26 05 26 and on the electrical site plan. We count ground rods, exothermic connections, and ground bars by location.
- Fire-rated penetration firestop and smoke-seal assemblies. The requirement sits in the spec and the UL systems are listed in an appendix, not on the plan. We key each rated wall and floor crossing to a UL system.
- Seismic bracing and conduit support spacing. The spacing depends on the adopted code edition. We confirm the edition with the local building department and apply the spacing that edition requires.
- Rooftop equipment: curb, disconnect, and lightning protection. These appear on the roof plan and in the mechanical schedule. We carry the disconnect and any lightning protection specified, and flag the curb if it is not electrical scope.
- Temporary power, GFCI protection, and construction-phase feeders. Often shown on a site logistics sheet rather than the electrical drawings. We carry them as a separate line so they can be included or excluded at bid time.
- Testing, commissioning, and arc-flash labeling. NFPA 70E labeling and commissioning are frequently a separate spec section. We carry them as line items rather than burying them in labor.
- Panel schedule development and as-built markups. If the spec requires the contractor to produce panel schedules, that is labor. We carry it as an HR line so it does not disappear into overhead.
- Coordination with mechanical and plumbing for motor connections and disconnects. The equipment schedule names the motors; the electrical drawings may not. We cross-check the mechanical schedule for horsepower and disconnect requirements.
- Permit fees, plan review, and utility service connection charges. These are not on the drawings. We list them as a separate non-takeoff block so your bid does not absorb them silently.
- Sales tax and freight on switchgear, transformers, and panelboards. Long-lead equipment carries freight and tax that change the bid. We carry them as separate lines tied to the equipment list.
- Change order markup and escalation on long-lead items. Switchgear and transformers quoted today may ship in months. We flag long-lead items so your Change Order module can price escalation separately.
Raceway and wiring method comparison
The choice of raceway and conductor material changes both material cost and labor units. This table shows typical conditions and what to watch for.
| Material / method | Typical use | Installed cost driver | Labor unit note |
|---|---|---|---|
| EMT | Exposed and concealed above ceilings in dry locations | Material cost per LF plus fittings and supports | Standard labor unit; bending and cutting included |
| IMC | Exposed in industrial areas and parking garages | Higher material cost than EMT; same support spacing | Labor similar to EMT but heavier to handle |
| RGC | Exposed in mechanical rooms and hazardous locations | Highest material cost; requires threaded couplings | Higher labor unit due to threading and cutting |
| PVC Schedule 40 | Underground direct burial and concrete encasement | Low material cost; requires solvent welding | Labor includes glue and trench coordination |
| PVC Schedule 80 | Underground where subject to damage | Higher material cost than Schedule 40 | Same labor as Schedule 40; thicker wall |
| THHN/THWN-2 | General branch and feeder wiring in conduit | Copper cost per LF; insulation rating | Labor unit per conductor size; pulling tension |
| XHHW-2 | Feeders in wet locations and underground | Copper or aluminum cost per LF; thicker insulation | Labor similar to THHN; larger bend radius |
| MC cable | Branch wiring in dry walls and above ceilings | Material cost per LF includes conductors and armor | Lower labor unit than conduit and wire |
| CAT6/CAT6A | Structured cabling for data and voice | Cable cost per LF; termination and testing | Labor includes pulling, terminating, and testing |
| Copper feeders | Feeders above #1/0 where specified | High material cost; requires lugs and supports | Labor unit per size; terminations counted separately |
| Aluminum feeders | Feeders above #1/0 where permitted | Lower material cost than copper; larger size for same ampacity | Labor similar to copper; anti-oxidant compound required |
Codes and standards that affect the electrical takeoff
Model codes
The National Electrical Code (NEC) is the primary model code for electrical work. The adopted edition varies by state and jurisdiction. NEC provisions that change quantities include conduit fill calculations (Chapter 9), support spacing (Article 358 for EMT), grounding and bonding (Article 250), and box fill (Article 314). The International Building Code (IBC) and International Residential Code (IRC) govern fire-rated penetrations and seismic bracing. The International Energy Conservation Code (IECC) affects lighting power density and controls, which can change fixture counts and add occupancy sensors. NFPA 72 governs fire alarm device spacing and notification. Always confirm the adopted code edition with the local building department before applying any spacing or fill rule.
Industry standards
NECA publishes labor units used in Accubid and Trimble databases. The National Electrical Contractors Association (NECA) labor units are the basis for many electrical estimates. ASTM standards cover conduit and wire materials. UL standards, particularly UL 263 for fire-rated assemblies and UL 723 for surface burning, determine firestop requirements. NFPA 70E covers arc-flash labeling and safe work practices, which can add line items for labeling and training. For grounding, IEEE 142 provides guidance on grounding system design. These standards do not change the takeoff method, but they change what items must be counted and how they are specified.
Specification sections
Division 26 sections drive the raceway and wiring takeoff. Section 26 05 19 (conductors and cabling) specifies insulation type and size range. Section 26 05 33 (raceways and boxes) specifies conduit type by location and support requirements. Section 26 05 26 (grounding and bonding) defines the grounding electrode system and bonding requirements. Section 26 24 16 (panelboards) gives bus ampacity, AIC rating, and breaker count. Section 26 51 00 (interior lighting) and 26 56 00 (exterior lighting) list fixture types and controls. Division 27 10 00 (structured cabling) and Division 28 31 00 (fire detection and alarm) add separate device counts. Division 33 70 00 (duct banks) covers underground raceway. Read each section for submittal requirements, testing, and commissioning that may add labor.
Local amendments
Local jurisdictions adopt model codes with amendments. For example, some cities require stricter seismic bracing than the model code, or they may have local amendments to the NEC regarding conduit fill or support spacing. Utility company requirements for service connections vary and may add charges not shown on the drawings. Fire marshal interpretations of NFPA 72 can change device spacing. Because adopted editions and amendments vary, confirm the specific edition and any local amendments with the local building department before finalizing the takeoff. We note the edition on the cover sheet and flag any assumptions.
Who sends us electrical work
Electrical contractors
You own the Accubid or Trimble license and the labor database. You need quantities that re-key cleanly so your estimator spends time on pricing and strategy, not on counting devices from a PDF.
Electrical estimators
You are carrying three bids at once and one of them has a short fuse. A marked-up plan set lets you audit the counts in an hour instead of rebuilding the takeoff from scratch.
General contractors
You are preparing a precon budget and need a Division 26–33 number before the electrical package is bid. The takeoff gives you a defensible quantity base to compare subcontractor bids against.
Design-build teams
The design is not complete and the owner wants a number. We take off what is drawn, list the assumptions, and flag the systems that are not yet designed so the estimate carries an explicit allowance.
Owners and facility teams
You are budgeting a tenant fit-out or a service upgrade and want to see where the cost sits. The takeoff separates raceway, wire, devices, fixtures, and equipment so you can see the drivers.