From the outside, two tracks can look identical. Cut the end and look at the conductors: one is copper all the way through, the other is aluminium wearing a thin copper skin.
Lighting track should carry solid copper conductors. Some low-cost track uses copper-clad aluminium (CCA): an aluminium conductor with a thin copper skin that looks like copper from the outside. The two are easy to tell apart on a sample, by cutting the conductor and looking at the core, and the difference matters: aluminium has higher resistance than copper of the same size and behaves worse at the sprung contacts that adapters and connectors rely on. For an OEM or project order, specify copper and check it on the first sample.
CCA is made by bonding a thin copper layer onto an aluminium core. It is lighter and cheaper than copper, and it solders and looks like copper on the surface. It has legitimate uses, for example in some cables where weight matters. In a lighting track, where the conductor is a fixed busbar that many contacts press against, its drawbacks show.
| Check | Solid copper | CCA |
|---|---|---|
| Cut the conductor, look at the face | Copper-coloured right through | Silver core, thin copper ring |
| Scrape the surface with a knife | Still copper underneath | Silver shows through |
| Weigh a short piece | Heavier | Noticeably lighter for the same size |
| Ask for the material in writing | "Copper" on the datasheet | Often "Cu" with no grade, or nothing |
The cut-face check takes a minute and needs only a saw or a pair of cutters. Do it on the first sample, and again on a length from the first production order.
The full sample routine, including profile and finish checks, is in how to vet a lighting track manufacturer in China.
G-Tracks track uses copper conductors in an extruded aluminium profile, built to IEC/EN 60570. Every length is tested for insulation and continuity before it is packed, and samples are sent before series production, so you can cut one and look.
CCA is an aluminium conductor with a thin layer of copper bonded to the outside. It looks like copper on the surface but has an aluminium core, which conducts electricity less well than copper and behaves differently at contacts.
Cut the conductor and look at the cut face: solid copper is copper-coloured right through, CCA shows a silver core. Scraping the surface with a knife shows the same. CCA is also noticeably lighter than copper of the same size.
An aluminium core has higher electrical resistance than copper of the same cross-section, so it runs warmer at the same current. Where the conductor touches adapter and connector contacts, aluminium oxidises and can creep under pressure, which can loosen contacts over time.
G-Tracks lighting track uses copper conductors in an extruded aluminium profile, built to IEC/EN 60570, and every length is tested for insulation and continuity before it is packed.
Datasheets, samples and OEM versions of every system in this article. No minimum order.
Installation · OEM
Why lighting track cut to length at the factory saves time and faults on site: how runs are measured, what the factory does to each length, and how to order it.
Track Systems · Standards
How 8-wire DALI + emergency lighting track works: three phases, a DALI pair and a separate emergency phase in one profile, when to use it and what to specify.
Installation · Standards
How the protective earth runs in lighting track: through the aluminium profile or as a separate PE conductor, why joints matter, and how to test the earth path.
