In-Wall CL3 Speaker Cable: The Rated Supply
Quick answer / TL;DR: Short answer: CL3 is a North American cable rating for in-wall/riser installation – the jacket is marked and the product carries a listing. Source it from electrical or AV distribution (stocked, documented) or factories (volume, custom print); retail rarely stocks rated cable. Specify gauge for the run length, CL3 jacket, and request the listing documentation for the inspection file.
CL3 is the rating that lets speaker cable enter a wall, and it changes the purchase: retail packs rarely carry it, distribution stocks it as a documented line, and factories produce it to the standard. The rating is also a compliance artifact – the jacket's markings and the listing behind them. This guide covers the rated supply.
This is the CL3 supply guide: what the rating means, the documents, the gauge choices for walls, and the channel that stocks it.
What the Rating Means
| The element | The meaning | ||
|---|---|---|---|
| CL3 | A cable classification for in-wall and riser use under North American practice | ||
| The jacket marking | The rating printed on the cable – the visible evidence | ||
| The listing | The product's certification backing the marking | The inspection | The file that proves the rating when questioned |
The rating is three things at once: a construction standard, a printed marking, and a listing. A cable missing any of the three is unrated in practice, whatever the packaging says.
The Documents and the Gauge
- The listing documentation: the certificate naming the product family
- The jacket marking: CL3 plus the temperature/voltage where applicable
- The gauge: matched to the run length – 14 AWG common, 12 AWG for long runs
- The jacket color: white/brown/black for room coding, where stocked
The documents travel with the shipment; the gauge travels with the plan. The rated line's purchase is both – the compliance file and the cut list.
The Channel That Stocks It
| The channel | The CL3 reality |
|---|---|
| Retail | Rarely stocked – unrated leads dominate the shelf |
| Electrical/AV distribution | Stocked, documented, credit terms |
| Factory | Produced to the standard, custom print, volume |
Specific listings, jacket formulations, and price levels are not provided in the knowledge base. The rating structure and the document set are the standard reference; confirm the listing and the marking with the supplier and the authority having jurisdiction.
Real-World Applications
The inspection-day file
An inspector asking for the in-wall cable's rating: the jacket marking photographed and the listing document filed – the compliance proven in a minute.
The retrofit run
Speaker wire fished through finished walls: CL3 stock from distribution, the run documented before the drywall closed – the retrofit legal and quiet.
The builder's standard
A builder specifying CL3 for every prewire: the factory line with printed length marks, the documentation per lot – the standard held across dozens of homes.
Related reading: The channel map for the purchase? Read the where can I buy speaker cable guide — blogs/news/where-can-i-buy-speaker-cable
Related reading: The gauge decision for the runs? Read the gauge and run length guide — blogs/news/where-can-i-buy-speaker-wire-gauge
Frequently Asked Questions
What does CL3 mean on speaker cable?
A North American cable classification for in-wall and riser installation – the jacket is marked with the rating and the product carries a listing behind it.
Where can I buy CL3 speaker cable?
Electrical and AV distribution stock it as a documented line; factories produce it for volume and custom print. Retail rarely stocks rated cable.
Do I need CL3 for in-wall speaker wire?
In-wall and riser runs generally require a rated cable under local codes – CL3 is the common speaker-cable rating. Confirm with the authority having jurisdiction.
What gauge should in-wall speaker cable be?
Match the run: 14 AWG covers most in-wall runs; 12 AWG for long or high-power runs. The rating and the gauge are separate decisions.
Sourcing speaker cable for a project, a store, or a private-label line? Contact our B2B sales team for specifications, samples, and volume terms – FOB and CIF options available. Request a quote or sample.