LLC Installation Techniques 2

Question 1

When installing low-voltage landscape lighting cable, what is the minimum burial depth recommended by NEC for direct-burial cable in a typical residential landscape bed?

Accepted Answer

6 inches

Answer

NEC requires low-voltage (under 30V) landscape lighting cable to be buried at least 6 inches deep in typical landscape applications.

Question 2

Which wire connection method is most recommended for outdoor low-voltage landscape lighting splice connections to prevent corrosion?

Accepted Answer

Waterproof gel-filled wire connectors

Answer

Waterproof gel-filled connectors seal out moisture and prevent oxidation, making them the preferred choice for outdoor landscape lighting splices.

Question 3

When installing a path light along a garden bed, what is the ideal angle to drive the ground stake to ensure stability against lateral movement?

Accepted Answer

Slightly angled away from foot traffic at 80–85°

Answer

Driving the stake at a slight backward angle (80–85°) gives the fixture greater resistance to being knocked sideways by foot traffic or lawn equipment.

Question 4

What is the primary purpose of using a 'home run' wiring layout instead of a daisy-chain layout in landscape lighting?

Accepted Answer

It delivers more equal voltage to each fixture

Answer

A home run (hub) layout runs a dedicated wire from the transformer to each fixture or zone, minimizing voltage drop and delivering consistent brightness.

Question 5

When running low-voltage cable beneath a concrete sidewalk in a residential installation, which method is most commonly used?

Accepted Answer

Hydraulic boring or rigid conduit threading

Answer

Hydraulic boring or pushing a rigid conduit sleeve beneath the slab avoids damage to the concrete and protects the cable from crushing.

(LLC) Landscape Lighting Certification Practice Test

(LLC) Landscape Lighting Certification Practice Test

LLC Installation Techniques 2