#4 copper wire typically costs about $0.85-$2.50 per foot, with many common insulated building-wire products averaging $1.25-$1.75 per foot before tax and delivery. The final price depends on insulation, conductor type, order length, supplier, and whether the quote includes installation or just wire.
| Item | Low | Average | High | Notes |
|---|---|---|---|---|
| #4 copper wire, per foot | $0.85 | $1.50 | $2.50 | Typical insulated single-conductor retail range |
| 100-foot wire purchase | $85 | $150 | $250 | Before tax, shipping, or cutting fees |
| 500-foot purchase | $425 | $700 | $1,100 | Bulk pricing varies by wire type and supplier |
| Electrician-installed run | $300 | $900 | $2,500 | Short, accessible run through complex routing |
What #4 copper wire costs by the foot
#4 AWG copper wire is commonly sold as THHN/THWN-2 building wire, XHHW-2, bare conductor, or flexible welding cable. For a standard insulated single conductor, a practical retail budget is $0.85-$2.50 per foot; a typical purchase of 100 feet is about $125-$175. Specialty insulation, small cut orders, and premium flexible cable can push the rate above that range.
Bare #4 copper often costs roughly $0.60-$1.20 per foot, depending on copper-market pricing and whether it is sold as a short cut or a larger coil. Flexible welding cable may run about $1.50-$3.50 per foot because its fine-stranded construction and durable jacket differ from ordinary building wire. Compare the exact wire type and listing unit, not just the gauge.
Assumptions: U.S. retail pricing for new copper wire, standard insulation, ordinary shipping, and no installation.
How insulation and cutting shape a wire quote
A wire quote can include more than the copper conductor. Insulation type, stranding, packaging, cut length, and freight affect the checkout total. The table gives typical per-foot retail ranges; supplier quotes change with copper markets and order size.
| Wire or quote component | Typical price | What changes the charge | Buying note |
|---|---|---|---|
| #4 THHN/THWN-2 copper | $0.85-$2.50 per ft | Insulation color, brand, length | Common choice for conduit installations |
| #4 XHHW-2 copper | $1.00-$2.80 per ft | Insulation construction and supplier | Confirm compatibility with the application |
| #4 bare copper | $0.60-$1.20 per ft | Copper weight and market rate | Not a substitute for insulated wire where insulation is required |
| #4 welding cable | $1.50-$3.50 per ft | Stranding, jacket, flexibility | May be priced differently from building wire |
| Cutting, shipping, and handling | $0-$40 per order | Cut-service policy, distance, order size | Check minimums and freight before checkout |
Conductor metal accounts for much of the base material value, while the insulation and production process affect the finished product price. A supplier may list a per-foot rate but sell only full spools, or may charge a cut fee for custom lengths. Ask whether the quote is for one continuous length or multiple cuts.
Gauge, run length, and insulation change the total
The “#4” designation means 4 AWG, not four separate wires. It identifies conductor size; it does not by itself confirm that a wire is suitable for a circuit. The required ampacity and permitted use depend on installation conditions, insulation rating, terminals, temperature limits, and applicable electrical code.
Length is a direct cost driver: a 50-foot run at $1.50 per foot costs $75 for wire, while 200 feet at the same rate costs $300. A purchase of several hundred feet may receive a lower unit price, but a contractor may still charge for measuring, cutting, handling, and waste. For runs longer than 100 feet, verify voltage-drop needs with a qualified electrician rather than choosing a gauge by price alone.
Insulation and construction create another measurable difference. THHN/THWN-2 often fits standard conduit applications, while XHHW-2 may be specified for different environments. Fine-stranded welding cable can cost 20%-100% more than common building wire, but it is designed for flexibility and is not automatically an approved substitute in fixed wiring. Confirm the required listing and insulation before comparing prices.
Access also changes a project quote. A straight, open route can take a fraction of the labor required to fish wire through finished walls, work in a crowded panel, or cross difficult spaces. Extra conduit, fittings, junction boxes, or circuit changes add materials and labor beyond the wire itself.
Three #4 wire purchases with different totals
These examples separate wire expense from installation so a buyer can compare a materials-only order with a contractor quote. Prices assume typical U.S. retail or service rates and are illustrative rather than fixed national quotes.
| Scenario | Wire quantity and rate | Other charges | Estimated total |
|---|---|---|---|
| Short materials order | 50 ft THHN at $1.60/ft = $80 | $10-$25 cutting or delivery | $90-$105 |
| Garage feeder materials | 120 ft THHN at $1.35/ft = $162 | $45-$120 conduit and fittings | $207-$282 |
| Installed difficult route | 150 ft wire at $1.50/ft = $225 | $500-$1,500 labor and $100-$350 materials | $825-$2,075 |
The installed example can climb further if the work requires a new breaker, panel modifications, trenching, permits, or wall repair. A $225 wire allowance is only one line item, not a complete feeder installation price. Request an itemized quote showing wire, fittings, labor, and any electrical upgrades.
Electrician labor can outweigh the wire bill
Electricians commonly charge about $75-$150 per hour, with regional rates, licensing, travel, and company minimums affecting the bill. A simple accessible pull may take 2-4 labor hours, while a longer or obstructed route may take 6-12 hours or more. The labor formula is .
For a straightforward short run, installation labor may total $200-$600, excluding materials and permit fees. Fishing wire through finished construction, working in a difficult attic or crawlspace, or coordinating a panel shutdown can raise labor to $600-$1,800 or more. Some contractors quote a fixed job price rather than an hourly rate, so the time estimate may not appear on the invoice.
Minimum service charges can make a small wire replacement disproportionately expensive. A contractor may bill a $125-$250 diagnostic or service minimum even if the work takes less than an hour. For a larger electrical project, ask whether adding the #4 wire run to the same visit reduces a separate trip charge.
Regional wire prices and delivery vary by market
Retail wire prices and installation quotes are not uniform across the country. Large metro areas may run about 10%-25% above lower-cost rural markets for electrician labor, while local taxes and freight can further widen the difference. A rural buyer may pay less per hour but more for travel, delivery, or a contractor’s minimum charge.
Wire itself may be more consistent than labor because many suppliers track copper costs nationally, but availability and shipping vary. A local electrical wholesaler may offer a better rate on a full spool, while an online cut-to-length listing may be convenient but carry higher shipping or handling charges. In remote areas, special ordering can add several days and $20-$100 in freight.
Get quotes from a local electrical supply house and a national seller using the same gauge, insulation, color, and continuous length. Compare delivered totals, including tax and freight, rather than the displayed per-foot price alone.
When #4 copper is worth comparing with aluminum
Aluminum conductor is often less expensive per foot than copper, but the two materials are not interchangeable without checking circuit requirements, ampacity, terminations, and code. Depending on size and construction, aluminum wire may cost 30%-60% less than a comparable copper conductor. Larger aluminum wire may be needed for a similar application, and compatible lugs or other equipment can affect the project total.
For a longer feeder, a licensed electrician can compare the complete installed cost of copper and appropriately sized aluminum, including wire, connectors, and labor. For a short connection or equipment that specifies copper, the apparent material savings may be small or unavailable. Never reduce wire size or change conductor material solely to match a lower online price.
Another option is to repair an existing approved conductor rather than replace an entire run, if the damage location and applicable rules allow it. A splice or termination repair may cost roughly $150-$500 for accessible work, but hidden damage or code concerns can make replacement necessary. Ask for repair and replacement pricing when both options are safe and permitted.
How to lower a #4 copper wire purchase
Measure the route carefully and add a modest allowance for terminations and routing bends, rather than ordering an oversized coil without checking return rules. Buying a full spool can lower the per-foot rate, but leftover wire has value only if it can be reused for a compatible project. Confirm whether a cut order is returnable before paying extra for custom lengths.
Compare equivalent products by conductor material, AWG, insulation rating, temperature rating, strand type, color, and certification. A low-priced bare wire listing is not comparable to insulated THHN, and a flexible welding cable listing may not meet a fixed-wiring specification. Request the manufacturer and exact product number if a quote uses a generic description.
Reduce labor costs by clearing access to the panel and route, identifying the equipment being served, and coordinating the work with other planned electrical tasks. Do not remove energized equipment covers or perform electrical work beyond local rules and personal qualifications. The safest savings come from accurate scope and comparable quotes, not from using undersized or unsuitable wire.