Track Light Symbol
Definition: The Track Light symbol represents a linear lighting system—drawn in electrical and lighting layout diagrams as a horizontal line (the track rail) with one or more spotlights or arrowhead symbols mounted on it, with In and Out conductor terminations—in which multiple individually-directional luminaire heads draw power from a continuous electrified rail, used in residential and commercial lighting plans per IEC 60598 and NFPA 70 (NEC) conventions.
Also known as: track lighting, track rail lighting, rail lighting, spot track light, track spotlight system, monorail lighting.
What the Track Light symbol means
The Track Light symbol denotes a complete track-lighting system consisting of an electrified rail (track) and one or more adjustable-aim luminaire heads (track heads) mounted on it. In electrical and architectural lighting plans, the symbol indicates a surface-mounted or suspended track that is wired to the electrical supply at one or both ends, with multiple fixture positions along its length.
Track lighting is used where flexible, re-aimable accent or task lighting is needed — in retail stores, galleries, kitchens, and office spaces. The track itself carries two or three conductors (live, neutral, and optionally earth) at low impedance, allowing heads to be repositioned anywhere along the track without rewiring. Track light symbols in lighting plans identify the track run and its connection points to branch circuits.
How to identify the Track Light symbol
The track light symbol in a lighting layout drawing is typically drawn as a thick horizontal or angled line (representing the track rail) with small luminaire symbols (rectangles, circles, or arrowheads) attached along its length indicating fixture positions. The rail line has termination points labelled In (supply entry) and Out (supply continuation or end cap). On one-line electrical diagrams, the track may be shown as a single line with a label such as 'track lighting' and the wattage or circuit number. IEC 60617 represents a luminaire as a circle with a line; track luminaires extend this with the rail context.
Function in a circuit
The electrified track rail provides continuous electrical contact along its length via two (for single-circuit) or four (for two-circuit) internal conductors. Track heads clamp onto the rail and make electrical contact through spring-loaded conductors in the track adapter (the part that slides into the track slot). The track is energised from a branch circuit connection at one end (or the middle), and the In terminal is the supply connection point while the Out terminal may continue to an end cap or to a daisy-chained track section. Individual heads can be positioned, rotated, and aimed independently after installation.
Standards: IEC vs ANSI
| IEC 60617 | Track lighting systems are governed by IEC 60598-1 (luminaires — general requirements and tests) and IEC 60598-2-2 (recessed luminaires — relevant for track luminaire safety). Track systems in Europe must also comply with EN 60570 (electrical supply track systems for luminaires), which specifies conductor spacing, contact design, current rating, and IP ratings for track rails. |
|---|---|
| ANSI/IEEE 315 | In North America, track lighting is regulated under NFPA 70 (NEC) Article 410 (Luminaires, Lampholders, and Lamps), which specifies wiring methods, circuit loading (not more than 2 A per 30 cm of track per NEC 410.151(C)), and grounding requirements. UL 1574 (Track Lighting Systems) governs safety. ANSI/IEEE 315 defines general luminaire and wiring symbols. |
| Key difference | EN 60570 (European track standard) mandates specific contact geometry, current ratings (3 A to 25 A), and IP ratings. NEC Article 410 and UL 1574 govern North American track systems. Track voltages differ: most North American track lighting operates at 120 V; European at 230 V. Low-voltage (12 V) track systems are common in both regions for accent lighting using MR16 halogen or LED heads. |
Terminals / pins
| Pin | Name |
|---|---|
| in | In |
| out | Out |
Typical values
Track current rating: 16 A (standard residential/commercial) per EN 60570; 20 A maximum per NEC 410.151. Track voltage: 120 V AC (North America), 230 V AC (Europe), or 12 V DC (low-voltage accent systems with transformer). Conductor system: 2-wire + earth (single circuit), 4-wire (2-circuit for separately switched zones). Minimum track section: 0.3 m; maximum run: limited by circuit ampacity and voltage drop.
Where the Track Light symbol is used
- Retail display lighting — track heads aimed at merchandise shelves, product display cases, and signage for accent illumination
- Art gallery and museum lighting — precisely aimed track spotlights highlighting artwork without revealing the light source position
- Residential kitchen island and countertop lighting — adjustable track heads providing task lighting over work surfaces
- Commercial office accent lighting — supplementing ceiling ambient light with directional track luminaires over workstations or reception areas
- Restaurant and hospitality lighting — warm-tone track heads creating atmosphere and highlighting table or bar areas
- Showroom and exhibition space lighting — flexible track systems allowing frequent reconfigurations for changing displays
Example
In a retail boutique lighting plan, a 3-metre track section is shown as a horizontal line with five track head symbols (arrowheads) at adjustable positions, the In terminal wired to a 20 A branch circuit from the distribution board, and an end-cap symbol at the Out terminal. The track supplies five 12 W LED track heads (total 60 W on a 230 V circuit = 0.26 A, well within the 16 A track rating), each aimed at a different merchandise display position.
Key facts
- The Track Light symbol is a line (the rail) with mounted luminaire symbols; the In terminal is the supply connection and the Out terminal is the track end or continuation point.
- Track lighting operates from a branch circuit connected at the In terminal; current rating per EN 60570 is up to 16 A (230 V) and per NEC 410.151 the load must not exceed 2 A per 300 mm (30 cm) of track.
- Track heads are repositionable along the track without rewiring — they clip into the rail slot and make spring-loaded contact with the internal conductors.
- EN 60570 governs track lighting systems in Europe and covers conductor spacing, contact geometry, current ratings (3–25 A), and IP ratings for indoor and outdoor track. UL 1574 governs North American systems.
- Single-circuit track has two current-carrying conductors (line and neutral) plus an earth; two-circuit track has four conductors allowing two independently switched lighting zones on the same track.
- Low-voltage (12 V) track systems use a remote transformer to step down line voltage, allowing smaller, lighter MR16 LED or halogen track heads for accent applications.
- Track lighting wiring in North American installations is governed by NEC Article 410, which prohibits track in certain hazardous, wet, or concealed locations and requires the track to be permanently connected (not cord-and-plug connected).
- LED track heads have largely replaced halogen MR16 and PAR lamp types, reducing heat output and energy consumption while maintaining beam adjustability.
Frequently asked questions
What does the track light symbol look like in a lighting plan?
The track light symbol is a thick line or bar (representing the track rail) with small luminaire symbols (arrowheads, rectangles, or circles) attached at positions along its length indicating each fixture head. The line has labelled termination points: In (supply connection) at one end and Out (end cap or continuation) at the other. In single-line electrical diagrams, the track is a labelled line with circuit information.
How is a track lighting system wired?
Track lighting is hard-wired to a branch circuit at the track's feed point (In terminal). The electrical supply — line, neutral, and earth — connects to the track's internal conductors at the track live end connector or through a ceiling rose or canopy. The track does not use a cord-and-plug connection in permanent installations. Each track head draws power through spring contacts in its track adapter, which clips into the track slot.
What standard governs track lighting systems?
In Europe, EN 60570 (Electrical Supply Track Systems for Luminaires) is the primary standard, specifying construction, safety, contact geometry, and current ratings for track rails and heads. In North America, UL 1574 (Track Lighting Systems) governs safety, and NFPA 70 (NEC) Article 410 covers wiring and installation requirements. General luminaire standards IEC 60598-1 and UL 1598 also apply to the luminaire heads.
What is the maximum load allowed on a track lighting circuit?
Under NEC 410.151(C), track lighting load must not exceed 150 watts (or 2 A at 120 V) per 300 mm (12 inches) of track. The total track load must not exceed the branch circuit rating. Under EN 60570, the track rail current rating (typically 16 A at 230 V = 3680 W for residential track) must not be exceeded. In practice, modern LED track heads have very low wattage, so the length restriction is the more common limitation in North American installations.
What is the difference between single-circuit and two-circuit track lighting?
Single-circuit track has two current-carrying conductors (line and neutral) plus an earth, allowing all heads on the track to be controlled by a single switch or dimmer. Two-circuit (or dual-circuit) track has four conductors, allowing heads to be assigned to one of two independently switched or dimmed circuits — useful for lighting zones (accent vs. ambient, or separately controlled display sections) on a single track rail.
Can track lighting be used outdoors?
Standard track lighting is rated for dry or damp indoor locations only. Outdoor use requires track systems and luminaire heads with the appropriate IP (Ingress Protection) rating: IP44 minimum for exposed outdoor use (splash-proof), or IP65 for jet-wash environments. EN 60570 specifies IP ratings for different track installation categories; the track head, track joint covers, and end caps must all meet the required IP rating for outdoor installation.
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