SPEC250 kcmil at a glance
| Also called | 250 MCM |
|---|---|
| Conductor area | 250 kcmil · 127 mm² |
| Stranded (Class B) | 37 strands · 0.575 in |
| THHN outside diameter | ≈ 0.711 in |
| Finished copper wire weight | ≈ 863 lb / 1,000 ft |
| Bare copper weight | ≈ 773 lb / 1,000 ft |
| Common put-ups | 1,000 ft reels · 2,500 ft reels · cut lengths for parallel sets |
| Conductor | 60 °C | 75 °C | 90 °C |
|---|---|---|---|
| Copper | 215 A | 255 A | 290 A |
| Aluminum | 170 A | 205 A | 230 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 250 kcmil
01Identify 250 kcmil Wire From Tags and Jacket Print
Start with the reel tag and the printing along the insulation or cable jacket. Look for 250 kcmil or 250 MCM, along with the conductor metal, insulation designation, manufacturer and date code. MCM is an older designation for the same conductor area; it does not describe a different size.
This size uses kcmil naming rather than an aught designation. Do not identify it by appearance alone or assume a nearby size is interchangeable. For a cable assembly, photograph the complete marking so we can distinguish the individual conductor size from the overall cable construction.
The supplied Class B stranded construction has 37 strands and an approximate conductor diameter of 0.575 inch. Approximate THHN outside diameter is 0.711 inch, including insulation. These measurements are reference points, not substitutes for legible markings: construction and insulation affect outside diameter. Send clear photos of an existing exposed end without stripping reusable wire just to identify it.
02What the 250 kcmil Specifications Mean
The 250 kcmil designation describes conductor cross-sectional area, equivalent to 127 mm². It does not establish the insulation type, voltage rating or suitability for a particular installation. Those details come from the product markings and manufacturer documentation.
Under NEC 310.16 at 30°C ambient, before adjustments, the supplied copper ampacities are 215 amps at 60°C, 255 amps at 75°C and 290 amps at 90°C. Aluminum values are 170, 205 and 230 amps in those respective temperature columns. These are reference values, not a blanket approval to operate every cable at the highest listed current.
Terminal temperature ratings, installation conditions and applicable adjustment or correction factors affect usable ampacity. A licensed electrician or engineer should determine the correct conductor and installation requirements.
For selling purposes, accurate identification matters more than selecting an ampacity column. We review conductor metal, insulation, condition and usable length to evaluate the material as surplus rather than treating every 250 kcmil conductor alike.
03Common Uses in Houston Construction and Plants
In Greater Houston construction and plant work, surplus 250 kcmil cable can remain after feeder installations, service work or changes to a project’s material requirements. Common applications include 255-amp copper feeders where the applicable conditions support that rating, parallel service sets, medium-voltage feeders and bare copper ground grids.
Some 400-amp service designs use two parallel sets of 250 kcmil conductors. That example is not a universal sizing rule. Conductor metal, terminations, installation conditions and the applicable parallel-conductor requirements must be evaluated by the project’s licensed electrician or engineer.
For resale review, keep matching cut lengths grouped and identify which reels belong to the same set. Differences in metal, insulation or remaining length can change how useful that inventory is to another project.
Building wire, medium-voltage cable and bare grounding conductor serve different purposes even when their conductor area matches. Photograph each construction separately, and tell us whether the surplus came from unused stock or previously installed material.
04Wire Types We Buy With 250 kcmil Conductors
We review copper and aluminum material in this size across building, industrial, utility and specialty constructions. Full reels are useful, but partial reels and reusable cut lengths also deserve a review. The complete cable designation matters because conductor size alone does not identify the product.
Types we buy include:
- THHN/THWN-2 building wire and XHHW-2 insulated wire.
- USE-2/RHW-2 wire and URD cable.
- MC cable and MC-HL / Teck cable.
- Medium-voltage cable, including clearly identified surplus reels.
- Tray cable and VFD cable.
- Bare copper and PV wire.
For multiconductor products, show the conductor count and all available jacket markings. Include photos of armor, shielding or other construction details where visible. Do not assume cables with the same conductor size have the same resale demand. As 250 kcmil wire buyers, we evaluate the actual product, its condition and the information available to support its reuse.
05How Footage, Weight and Packaging Affect Value
The value of 250 kcmil copper wire depends on more than copper weight. We consider the conductor market, cable type and current demand, size, footage, reel condition, manufacturer, date code, quantity and pickup logistics. Reusable material is usually worth more than its scrap or melt value.
The supplied approximate finished THHN/THWN-2 copper weight is 863 pounds per 1,000 feet. If that exact construction has a net wire weight of 863 pounds, it suggests approximately 1,000 feet. Subtract reel and packaging weight first; a gross scale weight cannot establish footage by itself.
Bare stranded copper is approximately 773 pounds per 1,000 feet, while bare aluminum is approximately 235 pounds per 1,000 feet. Do not apply those figures to armored, shielded or multiconductor cable.
Common put-ups include 1,000-foot reels, 2,500-foot reels and cut lengths for parallel sets. Preserve tags and sound packaging, and report footage as confirmed or estimated. Usable length and reliable identification help us assess resale potential.
06Sell 250 kcmil Wire in Houston With a Written Offer
Start by sending photos of the reel tags or jacket print, footage or weight, and your location. Include overall photos showing reel condition and any damaged areas. We review the material, provide a written offer, then schedule pickup or an appointment for drop-off. We verify the material on site before payment per the written offer.
For heavy reels, describe site access and the loading equipment available before scheduling. Tell us about damaged flanges, loose windings or other handling concerns. Do not move a heavy reel simply to get a better photo; use an accessible tag or jacket marking.
Our service area is Greater Houston: Harris, Fort Bend, Montgomery, Brazoria, Galveston, Chambers and Waller counties. Drop-off is by appointment only at 6402 McGrew St, Houston, TX 77087, in southeast Houston’s Mayfair area near I-45 and I-610.
Call or text 951-403-5738, or email industrial832@gmail.com. You can also request an offer for your surplus wire and review our Houston wire pickup process.
FAQQuestions sellers ask
Can I sell 250 MCM wire if the label does not say kcmil?
Yes. You can sell 250 MCM wire for review because MCM and kcmil describe the same conductor area. Keep the original label intact and photograph its complete wording. We still need the conductor metal, cable type and condition; the MCM designation alone does not provide those details.
Should I strip the insulation before asking for an offer?
No. Leave reusable insulated wire intact so its markings and construction remain available for evaluation. Stripping removes information and eliminates its potential use as insulated wire. If you already have bare copper, identify it separately. We will tell you what appears reusable and what is better suited to scrap.
Can you review mixed copper and aluminum 250 kcmil inventory?
Yes. We buy both metals, but identify and photograph each group separately when possible. Do not combine their weights into a single footage estimate because copper and aluminum have different weights. An inventory grouped by metal, cable designation and condition gives us a clearer basis for reviewing your surplus.
Are short or damaged 250 kcmil pieces worth submitting?
Send photos and describe the damage and available lengths. A cut length may still be reusable, but very short, burned or heavily damaged material may be better suited to scrap. We focus on reusable wire and will be direct about its condition rather than presenting every piece as resale inventory.
Are you affiliated with Houston Wire & Cable Company?
No. Houston Wire Buyers is not affiliated with Houston Wire & Cable Company or any manufacturer. We buy reusable surplus from sellers in Greater Houston. For a review of your 250 kcmil material, contact us directly at 951-403-5738 or industrial832@gmail.com with photos and inventory details.