6/3 Romex, usually sold as 6/3 copper NM-B cable with a ground, typically costs about $3-$7 per foot at U.S. retailers, with an average near $4.75. Total material and installation costs depend on cable length, local prices, route difficulty, labor, and whether the job needs a new circuit or panel work.
| Item | Low | Average | High | Notes |
|---|---|---|---|---|
| 6/3 NM-B cable | $3.00 per ft | $4.75 per ft | $7.00 per ft | Retail material range; brand and reel size affect price |
| 125-foot cable reel | $375 | $594 | $875 | Before tax and delivery |
| Installed cable run | $8 per ft | $15 per ft | $30+ per ft | Labor and basic installation; difficult routes can exceed this |
| New dedicated circuit | $500 | $1,100 | $2,500+ | Typical planning range, excluding major service upgrades |
What 6/3 Romex costs for common cable lengths
For budgeting, 6/3 NM-B commonly falls between $3 and $7 per foot, with approximately $4.75 per foot as a practical midpoint. A 50-foot purchase may run $150-$350, while 100 feet may cost $300-$700. Reel pricing can lower the per-foot rate, but the savings may disappear if leftover cable cannot be used on another project.
For a typical 100-foot cable-only purchase, budget about $475 before tax. This range assumes copper conductors, standard residential NM-B cable, ordinary retail availability, and no unusual bulk discount. Prices vary by brand, distributor, stock, and region; specialty colors or less common package lengths may cost more.
“6/3” means three insulated conductors sized 6 AWG, plus a bare equipment grounding conductor in the common 6/3-with-ground product. It is not the same as 6/2 cable. Confirm the cable description, conductor count, and grounding wire before comparing listings, because similar-looking products may not suit the intended circuit.
These figures cover the cable itself, not a complete electrical project. A new range, hot tub, subpanel, or other large load may require a breaker, receptacle or disconnect, connectors, permits, and professional labor. The right cable and circuit design depend on the appliance instructions, installation conditions, and applicable electrical code.
How copper cable, labor, and fittings appear in a quote
A quote for a 6/3 cable run may combine material, installation time, protective fittings, and project-specific charges. Cable is only one part of the bill, especially when a route passes through finished walls or requires panel work. The table shows typical planning ranges rather than a fixed national price.
| Cost component | Typical range | Pricing basis | What changes the charge |
|---|---|---|---|
| 6/3 NM-B cable | $3-$7 per ft | Material | Reel size, brand, copper market, retailer |
| Electrician labor | $75-$150 per hour | Time on site | Local rates, access, crew size, troubleshooting |
| Breaker and termination parts | $40-$250 | Per circuit | Panel brand, breaker type, receptacle or disconnect |
| Permit and inspection | $50-$400 | Per project | Municipality, scope, inspection requirements |
| Wall repair or added protection | $100-$1,000+ | Project allowance | Finished surfaces, drilling, firestopping, conduit needs |
Labor is often the largest variable after the cable on a long or concealed route. An accessible basement run may take only a few hours, while fishing cable through finished ceilings or multiple floors can require substantially more time and patching.
Some electricians quote a minimum service charge rather than billing a small job by the hour. A visit may include travel, diagnosis, and setup, so a short cable run can cost more per foot than a longer, straightforward installation. Ask whether the estimate includes the breaker, terminations, permit, testing, and cleanup.
Which run length, route, and circuit details raise the price
Length changes the material total directly, but route and electrical requirements determine how much work is needed. A straight 40-foot run through an open basement is materially different from a 40-foot path through insulated walls, a finished ceiling, and a crowded panel. Quote comparisons are meaningful only when they cover the same route and scope.
Longer routes and concealed access can push installed pricing well above the cable’s per-foot price. A basic accessible run may land near $8-$15 per foot installed, while difficult routing can reach $20-$30 or more per foot. These figures are rough project averages; small jobs may instead be priced as a minimum service call.
- Length: At $4.75 per foot, 75 feet of cable is about $356 before waste, fittings, or tax. Installers may add a few feet for routing and terminations.
- Route and access: Open framing is generally less labor-intensive than finished walls. Multiple floors, masonry, insulation, tight crawlspaces, and fire-rated assemblies can add time or restoration expense.
- Conductor and circuit needs: Cable size, breaker, and receptacle must match the equipment and design. A 6/3 cable is not automatically appropriate for every 240-volt appliance or load.
- Panel capacity: A full or incompatible panel may require extra work. A subpanel or service change can add hundreds to several thousand dollars beyond a basic branch-circuit quote.
- Protection and location: NM-B is intended for permitted dry indoor locations and is not a general-purpose outdoor or wet-location wiring method. Exposed or unsuitable portions may need another wiring method.
Do not select a breaker solely from a cable advertisement or a generic online chart. The cable’s allowable use, termination temperature, equipment rating, load calculation, and code rules all matter. An electrician can verify whether the proposed 6/3 cable meets the appliance instructions and local requirements.
How regional labor rates change installed 6/3 pricing
Cable material prices are relatively comparable across many U.S. markets, although local stock and delivery can create differences. Labor and permit costs show wider variation. As a broad budgeting adjustment, metropolitan markets with high wages may run 15%-35% above a national midpoint, while some rural markets may be 5%-20% below it. These are planning ranges, not guaranteed regional price lists.
For a straightforward dedicated circuit, a broad installed budget is $500-$2,500 or more. The lower end generally assumes a short, accessible route and an existing panel with capacity. The upper end can reflect long cable paths, finished-wall access, higher local labor rates, more involved terminations, or additional panel work.
Dense urban areas may add parking, building access, scheduling, or permit expenses. Rural jobs can have lower hourly rates but higher travel charges or limited contractor availability. In coastal or high-cost regions, both labor and local permit fees may raise the quote. A written estimate from a nearby licensed electrician is more useful than applying a national average mechanically.
When comparing quotes, request the proposed cable length and installation path, not just a lump sum. Confirm whether the contractor includes tax, permit, inspection, patching, and any required protection. Differences in scope—not just a high or low hourly rate—often explain why two estimates are far apart.
How many electrician hours does a 6/3 run take
A simple, accessible run may take one electrician roughly 3-6 hours, including setup, routing, terminations, and testing. A more involved installation can require 6-12 hours or a two-person crew, particularly when the cable must be fished through finished areas or the panel needs additional work. Time estimates exclude delays for inspections or unrelated repairs.
At $75-$150 per electrician-hour, a 4-hour visit represents $300-$600 in labor. The actual bill may include a minimum charge, apprentice and lead-worker rates, travel, or a flat project price. Some contractors price by the job because access and troubleshooting make hourly totals difficult to predict.
Before work begins, ask whether the quote covers making wall openings, drilling, firestopping, securing the cable, and closing or patching surfaces. Electrical repairs may be separate from drywall or paint restoration. If an installer discovers an obstruction or an undersized existing panel, the cost and schedule may change; the estimate should explain how change orders are handled.
Installation time is not a reason to rush electrical work. Proper cable support, box fill, terminations, grounding, testing, and inspection can affect both safety and compliance. A low labor estimate that omits these tasks may not be comparable to a complete installation price.
Three realistic 6/3 cable quotes by project scope
The examples below show how material and labor can combine for different jobs. They assume typical copper NM-B pricing and ordinary residential conditions; they are not bids. Actual totals vary by region, cable route, panel, permit rules, and whether wall repair is included.
| Project example | Material estimate | Labor and other charges | Estimated total |
|---|---|---|---|
| 40-ft open-basement run | 40 ft × $4.25 = $170; parts $75-$150 | 3-4 hours at $75-$125; permit allowance $50-$150 | $520-$820 |
| 75-ft run to a garage appliance | 75 ft × $4.75 = $356; parts $100-$250 | 5-8 hours at $85-$140; permit $75-$250 | $956-$1,976 |
| 100-ft concealed route with panel work | 100 ft × $5.50 = $550; parts $150-$350 | 8-12 hours at $100-$150; permit and patching $200-$800 | $1,700-$3,500 |
The same cable quantity can produce very different project totals because access and panel scope vary. In the first example, the open route keeps labor relatively contained. The third assumes more difficult access and additional panel-related work; it does not include a major service upgrade or extensive room reconstruction.
Ask contractors to separate cable, other materials, labor, permit, and restoration where practical. That makes it easier to spot whether one quote assumes a shorter route or excludes patching. If cable is supplied by the homeowner, confirm the exact product and whether the electrician will warranty the installation when customer-provided material is used.
What removal, delivery, and permits can add to the bill
New cable installation may require removal of old wiring, disposal, delivery, or extra preparation. A small cable order can carry a delivery charge, while a large reel may be heavy or unavailable for immediate pickup. Retail sales tax also varies by location and is not always included in displayed per-foot prices.
Allow roughly $50-$400 for a permit and inspection where required, plus any site-specific work. The local authority determines permit requirements and fees. A contractor may handle the application, but the fee should be shown clearly. Do not assume that a like-for-like repair and a new dedicated circuit follow identical rules.
Removing abandoned wiring can add $100-$500 or more when access is limited or disposal requires extra labor. Opening and restoring finished walls can cost $100-$1,000+, depending on the number and size of openings and whether painting is included. These amounts are highly scope-dependent; ask whether each item is included or billed separately.
Before buying a reel, measure the likely path and verify the intended cable type with the installer. Returning cut or opened cable may be difficult, and overbuying 25-50 feet at $3-$7 per foot can tie up $75-$350. A small allowance for routing is sensible, but a measured estimate helps avoid an expensive leftover.
How to lower the 6/3 installation price without cutting corners
Cost control usually comes from reducing unnecessary labor and preventing scope changes, not choosing a cable that does not meet the job requirements. First, define the appliance or equipment, approximate route, panel location, and desired outlet or disconnect location. Provide those details to each contractor so estimates cover the same work.
Keep the route accessible and the scope consistent to make the largest controllable savings. If practical, schedule the cable route while walls are open during a remodel. Avoid placing the equipment far from the panel without a functional reason, and ask whether a more direct route is allowed and appropriate.
- Request two or three itemized estimates from licensed electricians, with the same cable length, circuit scope, permit assumptions, and restoration allowance.
- Ask whether the contractor can use an available reel or standard product without compromising the specified cable type or code compliance.
- Clear stored items from the basement, attic, or crawlspace before the appointment, while leaving electrical panel work to the professional.
- Bundle related electrical work during one visit when each task is already needed; a second service call may carry another minimum charge.
- Confirm whether an existing circuit can safely serve the load before requesting a new run, but do not add a large appliance to a circuit without a proper load and code review.
- Skip cosmetic or premium accessories that are not required, while retaining correctly rated breakers, boxes, receptacles, disconnects, and protective components.
Buying cable independently can sometimes reduce material expense, but it can also create compatibility, return, and warranty issues. Ask the electrician whether customer-supplied 6/3 NM-B is acceptable and whether the quote changes. The cheapest per-foot listing is not a saving if it is the wrong conductor count, cable type, or length.
Finally, compare the complete installed price rather than the quoted cable rate alone. A contractor charging more for cable may include delivery, accurate measurement, connectors, permit handling, or a workmanship warranty. A clear scope and a qualified installer help prevent costly corrections later.