Bulk Cable: The Reel Is the Unit of Purchase
Quick answer / TL;DR: Short answer: total the conductor length including 10 percent routing slack and 3 m per termination, then round up to the nearest reel. Choose 100 or 305 m boxes for floors, 500 or 1000 ft reels for larger jobs, and cut-to-length only for long uniform runs. Confirm conductor material and jacket rating in writing.
Three bulk formats: reel, payout box, half box – the choice is about payout and splices.Bulk cable is sold by reel or by the metre. The price per metre falls with reel size, and the total cost depends on waste, cut accuracy and how much of the reel is used.
This page covers the sizes, the maths and the specification points to fix before comparing quotes.
Reel and Box Sizes
| Pack | Typical length | Best for |
|---|
| Box | 100 m or 305 m | Floor cabling |
| Spool | 500 ft | Mixed runs |
| Reel | 1000 ft | Large jobs |
| Cut length | Per metre | Uniform long runs |
A 100 m box gives 50 m of reach per run pair if you count conductors, which is the calculation most often done wrong.
What to Fix Before Comparing Prices
- Category and standard
- Conductor: copper, not CCA
- Jacket rating: riser, plenum, outdoor
- Shielding type
- Test data per reel
- Actual reel length
Short reels are common and rarely checked. Measuring the first delivery sets the standard for the contract.
Real-World Applications
A 20-desk floor with 25 m average runs needs about 600 m of conductor, so two 305 m boxes cover it with margin. A single 20 m run is cheaper as a finished patch cord than as a box.
Standards and Verification
| Reference | Relevance |
|---|
| TIA-568.2-D | Cabling requirements |
| IEC 61156 | Cable construction |
| UL 444 | Cable ratings |
Current prices are not provided in the knowledge base. Compare quotes against a written specification.
References
- TIA-568.2-D, Balanced Twisted-Pair Cabling
- IEC 61156-5, Symmetrical pair/quad cables
- UL 444, Communications cables
Practical Notes
Label leftover reels with category, jacket and date. Unlabelled cable gets used for the wrong class of link.
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Frequently Asked Questions
Box or reel?
Box for floors, reel for large jobs.
Is cut-to-length cheaper?
Only for long uniform runs.
How much slack?
About 10 percent plus 3 m per end.
Are reel lengths accurate?
Not always. Measure on receipt.
Sourcing cables for a project, a store, or a private-label line? Contact our B2B sales team for specifications, certification evidence, and volume terms – FOB and CIF options available. Request a quote or sample.
