Every metal luminaire on a track depends on one thing nobody sees: an unbroken earth path from the feed to the end of the run. There are two ways to build that path, and one way to lose it.
Lighting track carries the protective earth in one of two ways: through the aluminium profile, which acts as the earth path along the run and through every coupler, or through a separate PE conductor inside the track, next to the live and neutral conductors. Both work when the system is built for them. In both, the weak point is the same: the joints. An earth path is only as good as the coupler between two lengths, so every run should be tested end to end before handover.
| Earth through the profile | Separate PE conductor | |
|---|---|---|
| How it works | The aluminium body is the protective conductor | A dedicated copper conductor runs in the track |
| Across joints | Couplers bridge the profiles metal to metal | Couplers carry the PE conductor like the others |
| At the adapter | The adapter's earth contact touches the profile | The adapter's earth contact touches the PE conductor |
| G-Tracks systems | 1-phase 2-wire, 3-phase, 3-phase DALI, 8-wire | 1-phase 3-wire, cable tray |
On most 3-phase track, the aluminium profile itself is the protective conductor. It has a large cross-section, so its resistance along the run is low. The feed connects the incoming earth to the profile; couplers, corners and connectors clamp the next profile to it; adapters make their earth contact on the profile as they lock in.
What it needs:
A 3-wire 1-phase track, such as the G-Tracks 1-phase 3-wire track, carries L, N and a separate PE conductor. The earth no longer depends on metal-to-metal contact between profiles; it runs in copper, like the other conductors, and couplers connect it conductor to conductor.
It is chosen where:
The installation guide gives fixing distances, spans and load limits: track lighting installation.
G-Tracks builds both arrangements to IEC/EN 60570: profile earth on the 1-phase 2-wire, 3-phase, 3-phase DALI and 8-wire tracks, and a separate PE conductor on the 1-phase 3-wire track and the cable tray. Every length is tested for insulation and continuity before it is packed, and lengths cut at the factory arrive with clean, capped ends.
Either through the aluminium profile itself, which carries the protective earth along the run and through the couplers to every adapter, or through a separate PE conductor inside the track, alongside the live and neutral conductors.
Both are accepted under IEC/EN 60570 when the system is built for them. A separate PE conductor is chosen where the installation rules or the client require a dedicated protective conductor, or where the profile is painted or joined in ways that make a reliable metal-to-metal earth path harder.
Joints. A coupler or connector that is not the right part for the system, a cut end left uncleaned, a painted contact surface, or a joint that was never tightened can each interrupt the earth path between two lengths.
After installation, measure continuity from the earth terminal at the feed to the profile or PE conductor at the far end of every run and at each branch, and record the result before handover, following the national wiring rules.
Datasheets, samples and OEM versions of every system in this article. No minimum order.
Installation · Standards
Fixing distances, suspension spans, load limits, circuit protection and test values for 1-phase, 3-phase and DALI track, with the relevant IEC/EN standards.
OEM · Standards
Solid copper or copper-clad aluminium (CCA) in lighting track? How to tell them apart on a sample, why it matters for heat and joints, and what to specify.
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.
