Welding cable and DLO are different products
Welding cable is flexible, single-conductor cable used for welding leads. Its many small copper strands make it easier to handle than ordinary building wire of the same conductor size. DLO means diesel locomotive cable. It is also flexible single-conductor cable, but common constructions have tin-coated copper, separate insulation and an outer jacket for demanding power-lead applications.
Both belong in our wire and cable buying categories, but we need to identify them separately. A black flexible cable is not automatically DLO. A welding cable marked 600 V does not automatically carry an RHH/RHW-2 building-wire listing.
The table shows manufacturer-documented examples, not ratings that apply to every reel.
| Product family | Conductor and construction | Ratings and listing details to check |
|---|---|---|
| Standard EPDM welding cable | Fine-stranded bare copper with EPDM rubber insulation | Southwire's non-UL example is rated 600 V and 105°C. Do not assume a UL listing. |
| UL-listed extra-flexible welding cable | Bare copper, Class M rope stranding, with CPE covering in the verified Southwire example | 600 V, 90°C, UL-listed welding cable. The listing does not make it RHH/RHW-2. |
| DLO flexible power cable | Class I rope-stranded tinned copper, EPDM insulation and a CPE outer jacket in the verified Southwire example | 2,000 V, 90°C wet or dry. Check for HDFPC-DLO and RHH/RHW-2 markings. UL 44 applies to the RHH/RHW-2 listing. |
Some DLO products also carry RW90, sunlight-resistance or tray-use markings. Those details depend on the product and size. Photograph the actual markings instead of describing every DLO reel as tray cable.
Sizes and conductor metals we review
We review welding and DLO cable in all sizes, including 6 AWG to 777 kcmil and DLO marked 777.7 kcmil. Welding cable commonly appears in 6, 4, 2 and 1 AWG, then 1/0 through 4/0. Larger welding products can include 250, 350 and 500 kcmil. DLO may use less familiar sizes such as 262.6, 313.3, 373.7, 444.4, 535.3 and 646.4 kcmil.
Keep those decimal sizes on your inventory. Do not round 262.6 kcmil to 250 kcmil or call 535.3 kcmil a 500.
Our size pages cover smaller AWG reels, 1/0 through 4/0 cable and large kcmil reels. List each continuous length separately, even when several pieces share the same size.
We review bare copper welding cable and tinned copper DLO. We also buy surplus aluminum wire, but the welding and DLO constructions here are copper. If your tag says aluminum, list it separately rather than labeling it copper DLO. Include the marked voltage rating.
Read the jacket print and reel tag together
Look along an accessible section of cable for the repeating print line. It may identify the manufacturer, product family, AWG or kcmil size, voltage, temperature rating and listing marks. DLO can show type letters such as RHH/RHW-2 alongside DLO or HDFPC. Welding cable may simply identify itself as welding cable with its ratings.
Capture the whole repeating legend across several photos if needed. A close-up showing only 2KV leaves out the size and listing. Look for conductor or strand-class information, a UL mark and file number where present, wet/dry temperature ratings, sequential footage marks, and a date or production code. Not every product prints every field. Do not guess a manufacturing date from an unexplained code.
The reel tag may add the catalog number, conductor metal, strand count, original footage, color, lot number and manufacturing information. Compare the tag with the cable itself, especially if the reel has been reused for another product. Our reel tag and jacket print guide explains how to organize those details.
Original footage is not remaining footage on a partial reel. If accessible end marks establish the length of one continuous piece, send both readings. Otherwise, call the footage an estimate and explain how you arrived at it.
Photos that help us identify your cable
Send photos of your actual material, not a catalog image. For welding and DLO cable, useful photos include:
- The complete reel tag, including product and lot numbers.
- The jacket legend in sharp focus, with the size and ratings readable.
- The whole reel or coil, showing both flanges and how the cable is wound.
- An existing exposed end, if accessible, showing the fine strands and insulation layers. Do not strip sound cable for a photo.
- Any cuts, flattened spots, tape, splices, damaged ends or attached lugs.
- The full lot, with each reel or coil tied to an inventory entry.
Include the Arizona location, estimated continuous footage and whether each piece is new, unused or used. Send those details through Get an Offer.
What helps or hurts an offer
Full reels and long continuous partial reels are easier to match to another installation than many disconnected pieces. Readable markings, matching tags and reel condition also affect the offer. Keep different strand classes, sizes and voltage ratings separated, even when the cables look similar.
For welding cable, show any evidence of heat exposure, abrasion or contact with welding slag. For DLO, show damage to the outer jacket and any visible damage beneath it. Do not hide a taped area under the next wrap. We buy new and used cable; its condition affects the offer.
Tell us about outdoor storage, sun exposure and water exposure. A sunlight-resistant marking is useful identification, but it does not prove the reel stayed in usable condition. Photograph brittle areas, cracks or damaged reel flanges rather than assuming a heavy rubber covering makes them unimportant. These details affect the offer.
Manufacture date, brand, footage, listing and current product demand affect the review. Unused cable kept intact with its paperwork gives us more to work with than unidentified coils with uncertain lengths.
Where Arizona sellers may have leftover reels
Arizona's mining operations provide a relevant setting for flexible power cable and equipment-maintenance inventory. Freeport-McMoRan lists Morenci, Bagdad, Safford/Lone Star, Sierrita and Miami among its Arizona operations. Unused DLO may remain after equipment-lead fabrication, spare-parts changes or maintenance purchasing. Welding cable can remain after fabrication work or an over-order for new leads.
For mining operation surplus cable, identify the equipment or purchase order associated with the material. Keep DLO separate from multi-conductor mine power and trailing cable. Their constructions and identification requirements differ.
Large construction sites also involve pipe and structural fabrication. Southland's Vantage AZ1 page describes mechanical, plumbing and fire-protection work at a Goodyear data center campus scheduled for completion in 2028. Such work is a plausible source of unused welding-lead stock, not evidence that this project has cable available for sale or uses a specific cable brand.
For electrical contractor closeout inventory, separate welding and DLO reels from portable cord. Include the job reference and who has authority to release company-owned material. We pick up anywhere in Arizona.
Mistakes to avoid before selling
Do not combine separate lengths into one claimed continuous footage. Keep original labels attached and do not cut long cable into easier-to-handle pieces. Leave existing fittings in place for the first photos so we can see what you have.
Do not describe welding cable as approved for a feeder installation just because its voltage rating is high enough. DLO's additional listings matter, and fine-stranded conductors also need compatible terminations. Cable size alone does not establish connector suitability.
We buy leftover stock, used leads, coils, cut lengths and mixed lots. Send photos and we will make an offer. We confirm who is selling and keep simple paperwork with each purchase. An invoice, purchase order, job closeout paperwork or company letter, plus the name of the person releasing the material, helps us record the sale. For company-owned cable, include the person authorized to sell it.