Data centre cable: Cat6A, fibre trunks and plenum reels
A data hall fit-out generates cable in a shape no other building does: hundreds of boxes of the same Cat6A, a handful of fibre trunks, and a rack of patch cords that nobody wants to count.
- Cat6 and Cat6A
- CMP, CMR and CM
- Fibre and DAC too
Copper in a data hall is mostly Cat6 and Cat6A, in UTP, F/UTP or S/FTP constructions, and the jacket rating decides where it can be installed. Plenum cable rated CMP passes the NFPA 262 Steiner tunnel test and can run in an air-handling space. Riser cable rated CMR meets UL 1666 and runs between floors. General purpose CM is for neither. That hierarchy is the first thing a buyer checks.
Fibre is the other half. OM3 and OM4 multimode for reach inside a hall, OS2 singlemode for runs between buildings, and MPO trunks that arrive pre-terminated in lengths which either fit a design or do not. Direct attach copper, the short passive cables linking switches in a rack, is a third category, and it is almost always too short to be re-used anywhere else. Each of the three is reviewed on its own terms and none of them substitutes for another.
What we see from fit-outs is the overage: full boxes of Cat6A with the factory seal intact, partial boxes with forty feet left, fibre trunks with the pull eye still on them, and patch cords in bags. Full boxes are the easiest material in the whole building to place. Loose patch cords get counted and priced as a group, because individually they are not worth anyone’s afternoon. Counting is dull, and it is most of the review.
What we buy in this family
Condition and documentation decide the basis, not the family alone. These are the forms this material usually arrives in.
- Cat6 and Cat6A in boxes and reels
- Plenum CMP and riser CMR constructions
- F/UTP and S/FTP shielded copper
- OM3 and OM4 multimode fibre
- OS2 singlemode and MPO trunks
- Direct attach copper and active optical
- Tray rated industrial Ethernet cable
The jacket rating is the first question, not the category
Two boxes can both say Cat6A and be worth different amounts, because the plenum version uses different materials and is made to a harder test. CMP cable is what an air-handling ceiling demands, and it is what most halls in this region specify. A box of CMR in a hall that needs CMP is not a substitute.
The rating is printed on the jacket and repeated on the box label. Where a box is sealed and labelled the review is quick. Where boxes have been opened, re-taped and stacked in a container for two years, the label is often gone and the cable has to be read at the jacket.
Boxes, reels and fibre that cannot be shortened
Copper comes on 1,000-foot boxes and on reels, and the difference matters more than it looks. A sealed box is a known quantity with a factory length. A reel is a length that may or may not match its tag. A box with 400 feet left is worth reviewing; a box with 40 feet left joins the partial pile.
Fibre is different because it cannot be re-terminated by the average buyer. A pre-terminated trunk is useful only if its length and connector type match a design. Trunks in factory packaging with the pull eye intact are straightforward. Trunks that were installed and removed are tested material.
What a fit-out actually leaves, and what it is worth
The pattern repeats across every hall: the structured cabling contractor orders to a footage schedule with an allowance, the build changes, and the allowance stays in the container. That leaves full boxes, which are the best material in the lot, plus the partials from the last phase and the odds and ends from commissioning. We count what is sealed, read what is printed, and describe the rest as partials.
Where this cable turns up in the two states
The concentration is south of Charlotte airport, where the data hall corridor has grown on former farmland in Mecklenburg and York counties, and along the western North Carolina corridor, where large campuses have been built in Catawba and Caldwell counties. Each hall is fitted out in phases, and each phase generates the same overage in the same categories.
Research Triangle activity adds a different mix: university and pharmaceutical facilities that specify shielded copper and singlemode in ways a commercial fit-out does not, and smaller enterprise halls that turn equipment over faster. Charleston and Columbia contribute enterprise, healthcare and state work rather than hyperscale, and their cable volumes are correspondingly smaller and more mixed.
Coverage
North and South Carolina
Every city page carries the local industrial base and access notes. Start from a state hub if you are not sure which one applies.
If the material is in one of these states
Data centre cable questions
Is plenum cable worth more than riser cable?
Per foot, yes, because CMP constructions use different materials and cost more to make. That matters at review, since a box of Cat6A CMP is not the same asset as a box of CMR. Read the print on the jacket: CMP, CMR and CM are marked, and a box without a legible rating is reviewed as general purpose cable.
Can you use fibre trunks that were pulled and removed?
Sometimes. A trunk pulled through conduit and then removed has been tensioned, and its connectors may have been contaminated or damaged. Trunks still in factory packaging with the pull eye intact are straightforward. Removed trunks are tested material, and without a test record they are a gamble rather than stock.
How do you count partial boxes of Cat6A?
By box, and by remaining weight where the box is open. A sealed box is a known quantity. An open box with forty feet on the spool is counted as a partial and grouped with the other partials. Loose patch cords are not weighed one at a time; they are counted in bags and reviewed as a single group.
Do you buy cable from a decommissioned data hall?
Yes, and the useful distinction is between cable that was never installed and cable that was pulled out. Never-installed overage is material. Pulled cable has been tensioned and its performance is unproven without a test, so it is reviewed as recovery. Both are worth a conversation, and only one of them needs a test set.
Send data centre cable details
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- No fee and no obligation to sell.
- Written lot terms before anything moves.
- Pickup scheduled around your access rules.