LLC Landscape Lighting Safety & Code Compliance 3

Question 1

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

Accepted Answer

The junction box must be accessible

Answer

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

Question 2

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

Accepted Answer

7.5 feet

Answer

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

Question 3

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

Accepted Answer

12 inches

Answer

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

Question 4

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

Accepted Answer

At or before the point of use

Answer

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

Question 5

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?

Accepted Answer

18 inches to the point of termination

Answer

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.

(LLC) Landscape Lighting Certification Practice Test

(LLC) Landscape Lighting Certification Practice Test

LLC Landscape Lighting Safety & Code Compliance 3