LLC Landscape Lighting Electrical Wiring & Installation 3

Question 1

Which NEC article primarily governs the installation of outdoor low-voltage lighting systems (under 30V)?

Accepted Answer

Article 411

Answer

NEC Article 411 covers lighting systems operating at 30 volts or less, which includes most low-voltage landscape lighting systems.

Question 2

When connecting a low-voltage transformer to a 120V household circuit, the transformer must be plugged into or hardwired to a circuit that is:

Accepted Answer

GFCI-protected when installed in an outdoor or damp location

Answer

NEC requires GFCI protection for outdoor receptacles and any outlet in damp or wet locations where a landscape transformer would be installed.

Question 3

A hub-and-spoke (homerun) wiring layout for landscape lighting offers what key advantage over daisy-chaining?

Accepted Answer

Provides more even voltage to all fixtures

Answer

Hub-and-spoke runs individual wires from a central junction point to each fixture, so every fixture receives nearly the same voltage from the transformer.

Question 4

What is the correct procedure when splicing low-voltage wire in a wet or buried location?

Accepted Answer

Use UL-listed waterproof direct-burial splice connectors filled with silicone or dielectric gel

Answer

UL-listed waterproof direct-burial connectors with gel fill provide the moisture seal required for underground or wet-location wire splices.

Question 5

An installer measures 10.2V at a fixture that is supposed to receive 12V. What should be done FIRST to correct the problem?

Accepted Answer

Move the transformer tap to a higher voltage setting (e.g., 13V or 14V tap)

Answer

Most multi-tap transformers have 12V, 13V, and 14V output taps specifically to compensate for voltage drop on longer runs.

(LLC) Landscape Lighting Certification Practice Test

(LLC) Landscape Lighting Certification Practice Test

LLC Landscape Lighting Electrical Wiring & Installation 3