Sampo Lighting supplies conventional track rail in 2-wire, 3-wire, 4-wire and 6-wire formats, with feeds, straight, L and cross connectors, and suspension and recessed parts, as a set with matching track heads. The wire count tells you how many conductors run inside the rail. More conductors leave more room to separate circuits or groups of heads.
It doesn't tell you, by itself, how a particular run can be switched or grouped. That's confirmed per system before you order, and it's the first thing we check when a parts list arrives.
Read this table from the right-hand column first. The question in it is the one that decides the system; the conductor count only follows from the answer.
| System | Conductors | What changes | Ask first |
|---|---|---|---|
| 2-wire | The fewest conductors inside the rail. Treat the run as one supply path unless the factory confirms another arrangement. | Is one switching group enough for every head on this run? | |
| 3-wire | One conductor more than 2-wire, which leaves room to separate heads into groups along the same rail. | How many groups do you need, and how is each one switched? | |
| 4-wire | More conductors again, so more room to split circuits or groups along one rail. | Which heads belong to which group, and which control gear is planned? | |
| 6-wire | The most conductors in the conventional range, for runs where further separation is wanted. | Does the project really need this many separate paths, or would fewer do? |
Wire count tells you how many conductors run in the rail. It never tells you on its own which switching, grouping or dimming arrangement a run supports — that is confirmed per system.
The 2-wire rail carries the fewest conductors in the conventional range. It suits a run where every head can be treated as one group, but that's a judgement about your project, not a rule of the rail. Before choosing it, confirm with us how the exact system can be switched.
Ask before you choose:
The 3-wire rail adds a conductor, which leaves room to separate the heads on one rail into groups. How many groups, and how they're switched, depends on the exact system and the control gear around it — confirmed per system, not assumed from the number.
Ask before you choose:
The 4-wire rail carries more conductors again, so there's more room to split circuits or groups along a single run. It's a common question on longer runs that serve several zones; the arrangement you can actually use is confirmed for the exact rail and feed.
Ask before you choose:
The 6-wire rail has the most conductors in the conventional range. It's worth asking about when a project wants further separation on one run, and worth questioning when it doesn't — more conductors don't add value to a run that only ever needs one group.
Ask before you choose:
Three questions narrow it down, in this order.
Only once those three answers exist does the wire system become a sensible choice. Picking the rail first and the grouping second is how runs end up either under-wired or carrying conductors nobody uses.
Magnetic track (M25, M35 and the 48V profiles) uses its own rails, connectors and fixtures. It's never mixed with conventional rail on a run or in a count, and the planner on this site counts conventional rail only. If you're comparing the two, look at the full range and ask us about both in the same enquiry.
Send the parts list from the planner together with how the heads should be grouped. We'll confirm which wire system fits and what the arrangement looks like on that exact rail.