Ohio Wire Buyers buys reusable surplus 6 and 4 AWG electrical wire and cable from businesses anywhere in Ohio, including full and partial reels, boxed coils and usable cut lengths. To sell 6 AWG wire or a mixed lot containing #4 copper, send product photos and remaining footage for review and a written offer before pickup. We buy wire as product for resale and reuse, not as scrap metal by the pound.
Which products belong in a 6 and 4 AWG lot?
The gauge describes the conductor size, not the complete product. A reel of single-conductor building wire, a jacketed NM-B coil and bare grounding wire need separate descriptions even when their main conductors share the same AWG designation. Within this pair, 4 AWG is the larger conductor.
For surplus THHN/THWN-2 building wire, photograph the insulation print showing size, manufacturer and ratings. Southwire describes its copper product as PVC-insulated wire with a nylon sheath, used in conduit for services, feeders and branch circuits. A sub-feeder leftover should still be listed by its actual product designation, not simply as “panel wire.”
If the tag identifies XHHW-2 feeder wire, retain that designation rather than calling every black insulated conductor THHN. Keep nearby 10 and 8 AWG leftovers on separate inventory lines. Our wire-size overview helps organize lots that span more than this size group.
What are the ampacity, weight and reel-length differences?
The ampacities below are from NEC Table 310.16, 2023 edition, as reproduced in HELUKABEL's technical reference. They apply to insulated conductors with not more than three current-carrying conductors in raceway, cable or earth, based on a 30°C ambient temperature. They are not blanket breaker recommendations.
| Size | Copper amps: 60/75/90°C | Aluminum amps: 60/75/90°C | Approx. copper content, lb/1,000 ft of THHN | Approx. complete copper THHN weight, lb/1,000 ft | Standard THHN reel examples | Application context |
|---|---|---|---|---|---|---|
| 6 AWG | 55 / 65 / 75 A | 40 / 50 / 55 A | 81 lb | 95 lb | 500, 1,000, 2,500, 5,000 ft | Feeders and branch circuits; NM-B load circuits; bare grounding product |
| 4 AWG | 70 / 85 / 95 A | 55 / 65 / 75 A | 128 lb | 153 lb | 500, 1,000, 2,500, 5,000 ft | Larger feeder requirements; NM-B load circuits; bare grounding product |
Terminations and conditions of use govern the actual rating. Conductor insulation, equipment temperature limits, ambient temperature and conductor grouping all matter. Use the 2023 NEC ampacity reference with the applicable installation requirements, not the largest number in a row.
Both weight columns are approximate values from Southwire's copper THHN specification. Copper content excludes insulation; complete wire weight includes it, but neither includes the reel. Reel examples come from Encore's THHN sheet and describe original packaging, not footage remaining on a partial reel. Application notes refer to different product forms; the insulated-conductor ampacities do not size bare grounding conductors.

Is leftover 6 AWG automatically suitable for an EV charger?
No. “EV charger wire” is not a substitute for the insulation designation, wiring method and circuit requirements. A seller should describe the surplus product rather than promise that its gauge fits every charging installation.
Tesla's Gen 3 Wall Connector manual pairs a 50 A breaker with a maximum 40 A output and a 60 A breaker with a maximum 48 A output. For maximum output, it specifies minimum 6 AWG copper THWN-2-rated wire when the breaker is rated 75°C, but minimum 4 AWG copper THWN-2-rated wire when the breaker is rated 60°C. Its terminals accept copper only.
That is a useful example of why termination ratings matter. It does not make 6/3 NM-B interchangeable with individual THWN-2 conductors: Southwire limits NM-B ampacity to the 60°C value. For resale, identify the exact wire and leave installation selection to the qualified installer following the equipment manufacturer's instructions and applicable code.
How should you describe 6/3 NM-B and range-circuit leftovers?
Write the complete cable designation. In Southwire's 6/3 construction, the cable contains three insulated 6 AWG conductors plus a separate bare grounding conductor. The ground is not another insulated conductor of the same size. Photograph the outer jacket, package label and an existing exposed end without dismantling the cable.
Southwire also lists 4 AWG three-conductor NM-B. Both products need to remain identifiable as cable assemblies. For surplus NM-B coils and cut lengths, record continuous footage and whether the material was ever installed.
A note such as “left over from a range circuit” gives useful project context, but it does not establish suitability for another appliance. Load requirements and installation conditions still control. Southwire says its internal NM-B conductors are not separately listed as THHN, so stripping the outer jacket to create individual building-wire inventory is not appropriate.
Can bare #6 and #4 copper be sold for reuse?
Reusable bare copper grounding wire should be identified before it is treated as scrap. Southwire lists both sizes in stranded construction and describes bare copper for grounding and other electrical applications. Photograph the spool label and show whether the conductor is solid or stranded.
Do not advertise either gauge as a universal grounding electrode conductor size. That selection depends on the installation and applicable grounding rules, not on the feeder ampacity table above. Keep bare wire separate from insulated green wire and from mixed scrap offcuts so each item can be reviewed on its own merits.
What makes partial reels easier to evaluate for resale?
Continuous usable length, readable identification and honest condition notes matter more than a pile's appearance. Keep each color and product type separate, retain factory labels, and mark footage as measured, recorded or estimated. An original tag does not prove that a partly used reel still holds its original length.
Use cutting records where available. Our guide to measuring wire left on a reel explains ways to document uncertain footage. Do not apply the table's THHN weight to NM-B, aluminum wire or a reel with several different products wound together.
Disclose damaged insulation, crushed packaging, loose windings and previous installation. Leave reusable cable intact rather than cutting it into shorter pieces for convenience. The surplus-versus-scrap guide explains the difference between evaluating usable product and evaluating metal recovery; not every lot has a reuse market.
What should you send to sell 6 AWG wire or #4 copper?
Send an overview of the entire lot, then clear photos of each reel tag, insulation or jacket print, and existing cut ends. For NM-B, include the complete cable designation; for bare copper, show construction and labeling. A readable reel-tag photo can resolve details that a wide storage-area photo cannot.
List size, product type, copper or aluminum, color, individual continuous length, package condition and whether it is unused or previously installed. Identify estimates explicitly and explain any discrepancy between the label and your inventory record. Include the Ohio pickup location and whether loading equipment or a dock is available.
Ohio Wire Buyers verifies the seller and proof of ownership, such as an invoice, purchase order, closeout paperwork or company letter, and keeps a written purchase record. We review the material and reply with questions or a written offer. Payment method and timing are confirmed in writing before pickup; we then arrange pickup and check the count against the written terms. The selling process explains those steps.
Ready to clear identifiable reels or coils from your project inventory? Request an offer for your surplus wire or call 951-403-5738. Ohio Wire Buyers arranges pickup at your Ohio jobsite, warehouse, plant or yard; we do not maintain Ohio premises or accept seller deliveries.
Frequently asked questions
Can I combine 6 AWG and 4 AWG leftovers in one offer request?
Yes. Send one lot overview, but list each size, wire type, conductor material, color and length separately. A mixed request can include reels, coils and reusable cut lengths. Keep the original tags with their matching material so we can distinguish each item and describe the proposed purchase clearly in the written offer.
Do green insulated wire and bare copper need separate listings?
Yes. List green insulated wire by the product type printed on its insulation, and list bare copper separately with its size and solid or stranded construction. Color does not identify every product characteristic. Photograph both the package label and the conductor so we can review the material without assuming the two products are interchangeable.
Can you review a partial reel with no readable footage marks?
Yes. Send the original reel tag if available, an overview showing the amount remaining, and any purchase or cutting records. State clearly that the footage is unknown or estimated. Do not report the original factory length as the remaining length after wire has been removed; we may ask for more information before making an offer.
Should I remove the jacket from leftover 6/3 NM-B before selling it?
No. Leave reusable NM-B cable intact. Southwire states that its individual NM-B conductors are not separately listed or marked as THHN and cannot be installed apart from the complete cable. Removing the outer jacket changes what you have to sell and prevents us from reviewing it as an intact, identifiable cable assembly.
Do you buy wire that was pulled out of conduit?
Used cable is considered only if it remains reusable. Disclose that it was installed, describe how it was removed and photograph abrasion, bends, terminations and exposed ends. Do not assume that an undamaged-looking surface proves electrical suitability. If the material is not reusable, we say so; a scrap metal recycler may be the appropriate buyer.
Sources and further reading
- HELUKABEL allowable ampacity tables — NFPA 70, NEC 2023, Table 310.16
- Southwire SIMpull THHN/THWN-2 copper specification — SPEC10000
- Encore Wire copper THHN product sheet — standard reel packaging
- Southwire copper Type NM-B cable specification — SPEC10028
- Tesla Gen 3 Wall Connector installation manual — circuit and conductor requirements
- Southwire bare copper solid or compressed specification — SPEC10080
