SPEC8 AWG at a glance
| Also called | 8 gauge |
|---|---|
| Conductor area | 16.51 kcmil · 8.37 mm² |
| Solid diameter | 0.128 in |
| Stranded (Class B) | 7 strands · 0.146 in |
| THHN outside diameter | ≈ 0.216 in |
| Finished copper wire weight | ≈ 63 lb / 1,000 ft |
| Bare copper weight | ≈ 51 lb / 1,000 ft |
| Common put-ups | 500 ft reels · 1,000 ft reels · 2,500 ft reels |
| Conductor | 60 °C | 75 °C | 90 °C |
|---|---|---|---|
| Copper | 40 A | 50 A | 55 A |
| Aluminum | 35 A | 40 A | 45 A |
Dimensions from NEC Chapter 9 Tables 5 and 8. Weights are approximate and vary by manufacturer and insulation. For design, follow the NEC and a licensed electrician.
Wire types we buy in 8 AWG
01Identify 8 AWG Wire by Its Print and Conductor
Start with the reel tag and jacket print. Look for the conductor size, copper or aluminum identification, insulation type, manufacturer and date code. Photograph the complete printed description rather than just the gauge marking. For multiconductor cable, include markings that identify the conductor count and construction; the outside cable diameter alone does not establish the conductor gauge.
8 AWG means 8 gauge. It is not an aught designation, and its area of 16.51 kcmil does not change its standard AWG name. MCM is another term for kcmil, but neither should replace the printed 8 AWG identification when describing this material.
A solid 8 AWG conductor measures 0.128 in in diameter. Class B stranded construction has 7 strands and a conductor diameter of 0.146 in. Approximate THHN outside diameter is 0.216 in, including insulation. These dimensions help check identification, but they do not replace readable markings. Our AWG and kcmil wire gauge chart explains the sizing terminology.
02What 8 AWG Specifications Mean for Your Material
The specification table separates conductor dimensions, finished-wire weight and ampacity because those figures answer different questions. Conductor area helps identify size. Finished weight helps estimate footage. Ampacity concerns installation conditions, not resale value or a blanket circuit rating.
Under NEC 310.16 at 30°C ambient, before adjustments, 8 AWG copper has listed ampacities of 40 amps at 60°C, 50 amps at 75°C and 55 amps at 90°C. Aluminum values are 35, 40 and 45 amps in those respective temperature columns. The applicable rating depends on insulation, termination temperature limitations and installation conditions. NM-B uses the 60°C ampacity limitation; a higher insulation temperature rating does not automatically permit a higher circuit load.
Copper and aluminum also have different weights. Approximate weights per 1,000 ft are 63 lb for finished copper THHN/THWN-2, 51 lb for bare stranded copper and 16 lb for bare aluminum. Do not interchange these figures. Have a licensed electrician or engineer resolve circuit sizing and installation questions.
03Common 8 Gauge Applications Around Houston
Surplus 8 AWG cable can come from residential construction, commercial electrical work and plant maintenance across Greater Houston. Common applications include 40–50 amp circuits for ranges, larger A/C units and EV chargers, where the conductor material and installation conditions support the required rating. Small subpanel feeders are another use, subject to the actual load and applicable code requirements.
Equipment grounding conductors, 8/3 NM-B and portable cord also appear in this size. These are different products with different uses. A coil of building wire, a multiconductor residential cable and a flexible equipment cord should not be described as interchangeable just because they contain 8 gauge conductors.
When you sell 8 gauge wire left over from a project, tell us what the material is—not only what equipment it was intended to serve. Clear markings and packaging help us evaluate surplus from Houston construction sites and industrial facilities. Prior application can provide context, but condition and product identification determine whether we can consider it reusable.
04Types of 8 AWG Wire and Cable We Buy
We review both copper and aluminum material in this gauge, including individual conductors and cable assemblies. Keep different insulation types and constructions separated when practical. A clear photo of each product’s markings helps us distinguish inventory that might otherwise look similar on a reel or in a coil.
Building and feeder products we buy include THHN/THWN-2 wire, XHHW-2 wire, USE-2/RHW-2 wire, NM-B (Romex) cable, UF-B and SER/SEU. We also review MC cable and MC-HL / Teck cable.
Other accepted product categories include tray cable, VFD cable, portable cord, bare copper and PV wire. Identify the complete cable construction, not just an 8 AWG conductor within it. Include conductor count and any shielding or armor information visible on the tag.
As 8 AWG wire buyers, we focus on reusable inventory. Short pieces, burned insulation or heavily damaged cable may be better suited to scrap. We will tell you what we identify as reusable rather than treating every cable as resale material.
05How Footage, Weight and Packaging Affect Value
8 AWG copper wire value depends on more than the copper market. We also consider product type, current demand, size, footage, manufacturer, date code, quantity, reel or packaging condition and pickup logistics. Reusable wire is usually worth more than its scrap, or melt, value, but we need enough information to evaluate its reuse potential.
For a simple footage estimate, 63 lb of finished 8 AWG copper THHN/THWN-2 corresponds to approximately 1,000 ft. That must be net wire weight, excluding the reel and other packaging. The estimate does not apply to bare copper, aluminum or multiconductor cable, and actual product construction can affect weight.
Common put-ups include 500 ft, 1,000 ft and 2,500 ft reels. An original tag describes the original package, not necessarily what remains on a partial reel. Tell us whether footage is measured, estimated or taken from an unopened reel label. Intact packaging and clearly identified continuous lengths help us assess the material without confusing original footage with remaining inventory.
06Sell 8 AWG Wire in Houston With a Written Offer
Text photos to 951-403-5738 or email industrial832@gmail.com. Include reel tags or jacket print, footage or weight, condition and location. You can also request an offer for your surplus wire. We review the information, provide a written offer, then schedule pickup or an appointment for drop-off. We verify the material on site, with payment per the written offer.
Our service area is Greater Houston only: Harris, Fort Bend, Montgomery, Brazoria, Galveston, Chambers and Waller counties. Pickup is scheduled at the seller’s site. Tell us about site access, reel condition and available loading equipment before scheduling, especially when several reels or heavy cable assemblies are involved. Keep material accessible without moving it unsafely.
Drop-off is at 6402 McGrew St, Houston, TX 77087, in southeast Houston’s Mayfair area near I-45 and I-610. Call first; drop-off is by appointment only. We are Houston Wire Buyers, not affiliated with Houston Wire & Cable Company or any manufacturer.
FAQQuestions sellers ask
Can I sell a mixed lot containing 8 AWG and other gauges?
Yes. We buy surplus wire and cable across all gauges from 18 AWG to 1000 kcmil. Describe each identifiable product separately and send photos showing the different tags or jacket markings. Mixed inventory does not need to be described as one uniform lot; separating its details helps us review what you actually have.
Should I strip the insulation before asking for an offer?
Do not strip potentially reusable insulated wire just to prepare it for review. Its insulation and printed identification are part of the product we evaluate. Send photos in its current condition first. We also buy bare copper, but converting usable insulated wire into bare metal can remove its potential value as an identified electrical product.
Is an unopened 8 AWG reel enough to establish its condition?
Unopened packaging is useful information, but we still need to review the material. Photograph the tag, reel and any visible damage or storage exposure. Tell us if the packaging is wet, broken or otherwise compromised. An original package helps document the product; it does not replace the on-site verification in our buying process.
Can you review 8 AWG wire without a readable reel tag?
Send clear jacket-print photos if the reel tag is missing. Include the full visible marking and an overall photo of the material. If neither tag nor jacket print is readable, tell us that upfront. We can review the information available, but missing identification may limit our ability to evaluate it as reusable wire.
Does the listed ampacity mean my 8 AWG cable suits an EV charger?
Not by itself. An EV charging circuit requires evaluation of the equipment load, conductor material, cable type, terminations and applicable installation rules. The table provides reference ampacities under stated conditions, not a design approval. Ask a licensed electrician or engineer to determine whether your particular cable is suitable before installing it.