Landscape Lighting Safety & Code Compliance Flashcards

An installer finds existing landscape wiring spliced inside a weathertight junction box buried underground without conduit fill. What NEC violation exists?

Answer: The junction box must be accessible

NEC Section 300.15 requires that all junction boxes remain accessible; a buried box without an accessible cover violates this rule.

What is the required minimum clearance between a low-voltage landscape light fixture and the edge of a pool water surface?

Answer: 7.5 feet

NEC Article 680.22 prohibits luminaires within 7.5 feet horizontally from the pool edge unless they meet specific criteria.

When landscape lighting conductors are run in PVC conduit underground, the minimum burial depth under a public sidewalk is:

Answer: 12 inches

NEC Table 300.5 requires PVC conduit under sidewalks to be buried at least 12 inches deep.

A landscaper installs a 120V in-ground well light. Where must the GFCI protection be located?

Answer: At or before the point of use

GFCI protection for 120V outdoor fixtures must be provided at or before the point of use per NEC 210.8(A)(4).

Type UF cable used for direct burial in landscape lighting must be protected from physical damage when it emerges from the ground. What is the required protection height above grade?

Answer: 18 inches to the point of termination

Where UF cable emerges from the ground, it must be protected by conduit or equivalent from the point of emergence to the connection point above grade, typically measured to the equipment.

Which of the following best describes a 'wet location' as defined by the NEC for outdoor landscape lighting purposes?

Answer: Locations exposed to weather and saturating moisture

The NEC defines wet locations as installations exposed to weather including rain, sleet, and similar conditions that result in saturation.

A landscape lighting system uses a multi-tap transformer with outputs of 12V, 13V, and 14V. Why would an installer use the 14V tap?

Answer: To compensate for voltage drop on long wire runs

Higher voltage taps compensate for voltage drop over long conductor runs, ensuring fixtures at the end of runs receive adequate voltage.