APPLICATION ENGINEERING · TRACK LIGHTING
Copper-Clad Aluminum Round and Flat Conductors for Track Lighting
Review copper use without losing sight of voltage drop, contact reliability and profile fit.
Raytron supplies copper-clad aluminum round wire and precision flat wire in a range of widths, thicknesses and profile proportions for lighting-track projects. Share your conductor drawing, power-feed layout and pickup-contact requirements to define the material specifications and sample plan.
- Round wire
- Multiple flat-wire profiles
- Project-specific qualification
This page focuses on low-voltage DC track-conductor evaluation. Mains-voltage, mixed-supply and protective-earthing applications require a separate system review.
Engineering illustration — not to scale
| Marker | Component | What it means |
|---|---|---|
| 1 | Track housing | Supports the illustrated assembly; not the DC return conductor in this example. |
| 2 | Insulating carrier | Positions and separates the conductors. |
| 3 | P+ and P− power conductors | Two separate conductors form the power circuit. |
| 4 | Optional S1/S2 control conductors | Their use and protocol depend on the actual track system. |
| 5 | Pickup adapter | Makes electrical contact with the specified conductor surface. |
Where do CCA round and flat conductors sit inside a lighting track?
The conductors run along the track inside an insulating carrier. They connect the power-feed assembly to the luminaire pickup adapter. Depending on the system, separate conductors may also carry control signals. Power and control channels must be identified separately rather than assumed from the number of conductors.
Each CCA conductor has a single aluminum core surrounded by copper cladding. The copper surface forms the conductor's external contact surface; the complete cross-section, not just the surface, must be considered when evaluating DC resistance.
Illustrative construction, not a compatibility drawing. Conductor count, polarity arrangement and dimensions depend on the track system. Magnetic retention, where used, is separate from the current-carrying conductor.
These are materials for longitudinal track conductors—not flexible LED strips, PCB copper foil, magnetic retainers or a complete lighting-track kit.
CCA round wire and a range of precision flat-wire profiles
Raytron supplies both round CCA wire and multiple flat-wire profiles for track-conductor projects. Flat wire is available for specification in different widths, thicknesses and width-to-thickness ratios. Define the required geometry, material and contact surface together; final combinations and tolerances are confirmed against the project drawing.
Main panel — Precision CCA flat wire
Discuss the flat conductor that fits your insulating carrier, not just one standard strip size. Specify thickness × width, edge or corner condition, straightness and the designated pickup-contact face. The illustrations show different flat-profile proportions; they are not a list of stocked dimensions or current ratings.
Round wire
For track designs using round conductors, specify diameter, tolerance, temper, copper volume fraction and the pickup-contact interface. The existing copper-wire diameter is a design reference, not proof of equal current rating after a material change.
Profile A — narrower flat section
Required thickness and width, side clearance and edge/corner condition.
Profile B — wider flat face
Available carrier space, contact-face location and pickup alignment.
Profile C — thinner flat section
Required thickness tolerance, flatness, handling and assembly support.
Engineering illustration — not to scale
| Flat-profile illustration | Specification focus |
|---|---|
| Profile A — narrower flat section | Required thickness and width, side clearance and edge/corner condition. |
| Profile B — wider flat face | Available carrier space, contact-face location and pickup alignment. |
| Profile C — thinner flat section | Required thickness tolerance, flatness, handling and assembly support. |
Round-wire panel
For track designs using round conductors, specify diameter, tolerance, temper, copper volume fraction and the pickup-contact interface. The existing copper-wire diameter is a design reference, not proof of equal current rating after a material change.
Discuss Round-Wire RequirementsDefine the flat profile in your drawing
| Flat-wire requirement | Information to share |
|---|---|
| Thickness T and width W | State T × W in mm; identify whether these are the existing dimensions or proposed dimensions. |
| Dimensional tolerances | State thickness and width tolerances separately. |
| Width-to-thickness ratio | Derived from W/T; it does not by itself establish current rating or manufacturability. |
| Edges and corners | Describe the required edge condition and any corner radius; feasibility is confirmed for the drawing. |
| Straightness and flatness | Describe the carrier length, insertion method and relevant assembly limits. |
| Pickup-contact face | Mark the contact face and its position; identify any local copper-layer requirement. |
| Temper and surface | Describe forming/handling needs and the finish to assess with the mating contact. |
| Packaging and orientation | Share reel/coil, payout direction and contact-face protection requirements. |
Material requirements for both forms
| Specification item | What to define |
|---|---|
| Core material | Aluminum; identify any aluminum-alloy-core option separately. |
| Copper content | State volume percentage, written as vol.%; do not substitute a weight percentage. |
| Electrical properties | Resistance or resistivity at a stated temperature, with a defined measurement method. |
| Copper coverage | Continuity, local minimum thickness and the designated contact zone; flat-wire narrow edges are also copper clad. |
| Mechanical condition | Temper, tensile properties and assembly/forming requirements. |
| Delivery | Traceability, sample quantity, packaging and production order conditions. |
Multiple specifications in one enquiry
You can submit several flat-wire sizes, round-wire sizes, or a combination in one enquiry. List each specification with its intended use and quantity in the project description. You do not need to send a separate enquiry for every size.
What the review provides
A requirement-gap list, candidate material/profile options and a proposed sample-verification plan. Sample availability, production dimensions, surface requirements and delivery terms are confirmed for the agreed specifications. This page does not imply that every possible width, thickness and copper-ratio combination is available.
Three ways to evaluate a change from copper
| Design route | What stays fixed | What the review must resolve |
|---|---|---|
| Keep the existing profile | Conductor diameter or thickness/width and available groove space. | Whether the proposed material meets voltage-drop, contact and temperature limits; the permitted load may need to change. |
| Preserve the required system duty | The project's load, run length and performance limits. | Whether a different copper ratio, material condition or larger conductor section can meet the target; tooling or carrier changes may be necessary. |
| Coordinate a wider redesign | The product's agreed performance and cost objectives. | Conductor profile, feed segmentation, rated load and validation cost together; additional feed points require system-level design approval. |
Compare the cost per metre of an accepted track-conductor design—not only the price per kilogram. Material mass, conductor count, production yield, surface requirements and the cost of qualification all belong in the comparison.
Where the material or system requirements cannot be met, retain the copper baseline or evaluate another approved design.
Application example: reviewing an existing copper track conductor
Illustrative design review—not a customer qualification result
A lighting-track manufacturer wants to evaluate copper use in a low-voltage DC track while keeping the adapter interface and assembly process manageable. The starting point is the existing conductor profile and the intended power-feed and load arrangement. The input may be a round-wire drawing, one flat-wire profile, or several flat-wire sizes used across a product family; each candidate retains its own geometry and acceptance criteria.
| Stage | Review activity | Deliverable |
|---|---|---|
| 1. Establish the baseline | Collect conductor dimensions, run length, load distribution, feed positions and contact requirements. | A shared input sheet and a list of missing limits. |
| 2. Compare candidate routes | Review same-profile and revised-profile options without assuming equal ampacity. | A preliminary comparison of resistance, fit and unresolved validation items. |
| 3. Trial material and assembly | Evaluate sample dimensions, copper coverage, handling, insertion and pickup contact. | Material records and a customer assembly-trial record. |
| 4. Approve the system specification | Verify the defined load cases, contact behaviour, temperature and applicable system requirements. | An agreed production specification, or a documented reason to retain copper. |
This example illustrates a development method. It does not claim a completed installation, a certified current rating or a measured saving for a Raytron customer.
Voltage drop is a circuit question—not just a material label
Illustrative calculation only. The candidate resistivity below is an assumed input, not a Raytron grade specification or a measured result.
Inputs
48 V DC supply; fixed 10 A current; 3 m one-way distance; single-end feed with the load at the far end; two equal power conductors, each 0.60 × 4.00 mm, giving 2.40 mm² per conductor; 20°C material values. Contacts, connectors, feed cables and temperature rise are excluded.
Equations
- Loop resistance = 2 × resistivity × one-way length ÷ area per conductor.
- Voltage drop = current × loop resistance.
- Conductor-pair loss = current² × loop resistance.
| Result | Copper reference | Assumed CCA candidate |
|---|---|---|
| Resistivity at 20°C (Ω·mm²/m) | 0.017241 | 0.025000 |
| Area of each conductor (mm²) | 2.40 | 2.40 |
| Loop resistance (Ω) | 0.0431025 | 0.0625000 |
| Voltage drop at fixed 10 A (V) | 0.431 | 0.625 |
| Voltage drop relative to 48 V | 0.90% | 1.30% |
| Loss in the two conductors together (W) | 4.31 | 6.25 |
The assumed candidate has a higher resistance at the same section. Under these particular inputs, approximately 3.48 mm² per candidate conductor would give the same DC resistance as the 2.40 mm² copper reference. That is a resistance comparison—not an approved conductor size or an equal-current rating.
Distributed luminaires, centre feeds and segmented tracks require the current in each segment to be considered. Actual constant-power drivers may draw a different current as their input voltage changes. The fixed-current example does not model that behaviour or predict a temperature rise.
The pickup-contact surface deserves its own specification
A bulk resistance measurement does not describe every electrical contact along the track. Define the pickup-contact material, contact force, contact location, surface condition and permitted insertion or repositioning cycles. Movement and the contact design can affect contact reliability; surface finish must be assessed with the mating system rather than treated as a universal solution.
Engineering illustration — not to scale
- Contact direction
- Contact area
- Local minimum copper thickness
- Aluminium core
| Review item | What to check |
|---|---|
| Local copper thickness | Measure the designated contact face, edges and other critical locations; average copper content alone is insufficient. |
| Initial contact behaviour | Record resistance or voltage drop using a defined fixture, measurement location and method. |
| Durability | Recheck contact behaviour and copper coverage after the agreed mechanical and environmental sequence. |
| Contact-force retention | Check contact preload and position after the agreed thermal cycling and movement sequence. |
| Adapter and connector heating | Evaluate each location using its actual current, not automatically the total track current. |
| Cut ends and assembly damage | Review edge damage, exposed cut ends, separation and the agreed protection method. |
For illustration, a contact carrying 10 A with 5 mΩ resistance dissipates 0.50 W at that location. This is not an acceptance threshold or a temperature prediction. A luminaire pickup may carry much less current than the feed connector.
This page does not specify a universal copper-layer minimum or claim hot-plugging capability. Repositioning or connection under power must follow the approved track-system instructions.
Qualification checklist: from wire sample to lighting track
Agree on the conditions, responsibility and acceptance limits before testing. Material-level records support—but do not replace—system-level approval.
| Review area | Evidence to establish | Lead responsibility |
|---|---|---|
| Electrical baseline | Conductor dimensions, resistance at a stated temperature, feed arrangement and load cases. | Raytron for material data; system manufacturer for circuit inputs. |
| System temperature and voltage drop | Farthest-load voltage and hot spots at feeds, joints and pickups under the defined installation and ambient conditions. | System manufacturer / designated test laboratory. |
| Pickup durability | Initial and post-sequence contact resistance, contact-force condition, surface wear and stable operation. | System and adapter manufacturers, supported by material analysis. |
| Profile and assembly | Groove fit, conductor position, tolerances, edge condition, straightness and insertion behaviour. | Raytron and system manufacturer. |
| Copper coverage and bond | Local minimum copper layer, continuity and absence of unacceptable separation or exposed core on working surfaces. | Raytron, using agreed inspection methods. |
| Termination and cut ends | Connector fit, retention, joint behaviour after the agreed thermal sequence, and end protection. | System / connector manufacturer with Raytron support. |
| System safety and abnormal operation | Applicable supply classification, insulation, polarity/separation and fault-protection requirements. | System manufacturer / designated test laboratory. |
| Control channels | Actual protocol, wiring topology, continuity, interference and operational stability. | System and control-equipment manufacturers. |
| Release and traceability | Approved drawings, sample/batch identifiers, inspection plan and change-control requirements. | Both parties. |
IEC 60570 addresses electrical supply track systems for luminaires; applicability and the required edition must be confirmed for the actual system and target market. ASTM B566 addresses specified bare round CCA wire and does not certify a flat conductor or completed lighting track. Relevant contact-resistance methods and national system requirements must be selected for the test plan.
From your drawing to a quote-ready conductor specification
-
Step 1 — Share the baseline.
Provide the conductor profile, system voltage, feed arrangement, run length and required load. An initial description is sufficient to begin; missing details can be identified during review.
-
Step 2 — Define a candidate and sample plan.
Agree on core material, copper volume fraction, geometry, temper, contact-surface requirements and the measurements needed for evaluation.
-
Step 3 — Verify the sample in the actual assembly.
Review material records alongside the customer's carrier, adapter and system tests. Record unresolved issues rather than treating a bare-wire result as a complete approval.
-
Step 4 — Confirm production terms.
Release the agreed drawing, inspection criteria, packaging, traceability and order conditions after the required reviews are completed.
The objective is a specification that engineering, purchasing and production can use together.
Track-conductor questions from buyers and engineers
Is this CCA wire for flexible LED strips?
No. This page concerns longitudinal conductors inside a lighting track. Flexible LED-strip circuits, PCB copper foil and lamp lead wires are different applications.
Can CCA replace copper at the same dimensions?
It can be evaluated within the same physical envelope, but the existing current rating does not automatically carry over. Resistance, voltage drop, contact behaviour and system temperature must be checked against the required duty.
Do you supply only round CCA wire or one flat-wire size?
No. Raytron supplies round CCA wire and precision flat wire in different widths, thicknesses and width-to-thickness ratios. Submit one profile or several specifications in the same enquiry. Dimensions, tolerances, edges, copper content, temper, surface and delivery terms are confirmed for the agreed drawing; the illustrations and calculation do not define a fixed stocked range.
Does a 48 V supply make the track automatically suitable?
No. Supply classification, installation, load, conductor separation, contacts and protection still require review. A nominal voltage alone does not establish SELV compliance or a permitted current rating. Mains-voltage and mixed-supply systems need separate evaluation.
Is copper content by volume the same as copper content by weight?
No. Copper and aluminum have different densities. State the basis explicitly. The target copper fraction on this enquiry form is vol.%; a historical grade code or weight percentage must not be interpreted as the same volume percentage.
Can the copper surface use any existing pickup adapter?
No. Review contact geometry, force, surface finish, local copper thickness and durability with the actual adapter. This page does not claim compatibility with any named third-party track system or support live repositioning.
Can the same material be used for control conductors?
It can be assessed separately for the specified control circuit. Confirm the protocol, electrical requirements, layout and contact stability; suitability for a power conductor does not establish control-system compatibility.
What should I send for an initial review?
Send your company and contact details, target market, and a short project description. Conductor dimensions, voltage, track length, feed arrangement and required load help the review, but the form also accepts an early-stage enquiry. For flat wire, write thickness × width and any tolerance or contact-face requirements in the description; multiple specifications can be listed together.
Related materials, process information and references
Product links
Reference panel
| Reference | Role in a project |
|---|---|
| IEC 60570 | Lighting-track system requirements; confirm the adopted edition and actual scope. |
| ASTM B566 | Material requirements for applicable bare round CCA classes; not a completed-track certificate. |
| IEC 60512-2-1 | A contact-resistance measurement-method reference where selected for the agreed test plan. |
| UL 1574 | A track-lighting system reference for applicable North American qualification routes. |
These references identify review topics, not approvals held by a particular Raytron conductor.
Send your track-conductor requirement
Share the profile you use today and the performance you need to retain. Raytron will review the material requirements and the next steps for a candidate specification and samples.
Application: lighting-track conductors. Products: CCA round wire and multiple precision flat-wire profiles. One enquiry can contain several specifications; sample and production terms are confirmed separately.
Engineering Every Micron.