Article 11

Low-Voltage Lighting

Informational Note: Refer to Article 680 for applications involving immersion.

• 411.1 Scope. This article covers lighting systems and their associated components operating at no more than 30 volts ac or 60 volts dc. Where wet contact is likely to occur, the limits are 15 volts ac or 30 volts dc.
• Low-Voltage LightingInformational Note: Refer to Article 680 for applications involv‐ing immersion.411.1 Scope. This article covers lighting systems and their associated components operating at no more than 30 volts ac or 60 volts dc. Where wet contact is likely to occur, the limits are 15 volts ac or 30 volts dc.
  1. Low-Voltage Lighting Systems. Low voltage lighting systems shall consist of an isolating power supply, low-voltage luminaires, and associated equipment that are all identified for the use. The output circuits of the power supply shall be rated for 25 amperes maximum under all load conditions.•
  2. Listing Required. Low-voltage lighting systems shallcomply with 411.4(A) or 411.4(B).
     1. Listed System. The luminaires, power supply, and lumin‐ aire fittings (including the exposed bare conductors) of an exposed bare conductor lighting system shall be listed for the use as part of the same identified lighting system.
     2. Assembly of Listed Parts. A lighting system assembled from the following listed parts shall be permitted:
     1. Low-voltage luminaires
     2. Power supply
     3. Low-voltage luminaire fittings
• (4) Suitably rated cord, cable, conductors in conduit, orother fixed Chapter 3 wiring method for the secondary circuit•
  1. Specific Location Requirements.
     1. Walls, Floors, and Ceilings. Conductors concealed or extended through a wall, floor, or ceiling shall be in accord‐ ance with (1) or (2):
        1. Installed using any of the wiring methods specified in Chapter 3
        2. Installed using wiring supplied by a listed Class 2 power source and installed in accordance with 725.130
     2. Pools, Spas, Fountains, and Similar Locations. Lighting systems shall be installed not less than 3 m (10 ft) horizontally from the nearest edge of the water, unless permitted by Article 680.
  2. Secondary Circuits.
     1. Grounding. Secondary circuits shall not be grounded.
     2. Isolation. The secondary circuit shall be insulated from the branch circuit by an isolating transformer.
     3. Bare Conductors. Exposed bare conductors and current- carrying parts shall be permitted for indoor installations only.
        Bare conductors shall not be installed less than 2.1 m (7 ft) above the finished floor, unless specifically listed for a lower installation height.
     4. Insulated Conductors. Insulated secondary circuit conductors shall be of the type, and installed as, described in (1), (2), or (3):
     1. Class 2 cable supplied by a Class 2 power source and installed in accordance with Parts I and III of Article 725.
     2. Conductors, cord, or cable of the listed system and instal‐ led not less than 2.1 m (7 ft) above the finished floor unless the system is specifically listed for a lower installa‐ tion height.
     3. Wiring methods described in Chapter 3.
  3. Branch Circuit. Lighting systems covered by this article shall be supplied from a maximum 20-ampere branch circuit.
  4. Hazardous (Classified) Locations. Where installed in hazardous (classified) locations, these systems shall conform with Articles 500 through 517 in addition to this article.