How to Wire Low-Voltage Lighting

Low-voltage lighting is frequently used for landscaping, security systems and home automation. This kind of lighting is reliable, safer than high-voltage options and more energy-efficient. If you’ve never worked with low-voltage lighting before or need a refresher on how to wire it, this guide is for you.

Wiring low-voltage lights requires research and following safety precautions. You need to thoroughly understand your goals before choosing the right wire, transformers, connectors and other equipment. You may also need a permit, so always check local regulations before getting started.

What Is Low-Voltage Wiring?

Like its name suggests, low-voltage (LV) wiring uses fewer volts than standard wiring systems. Because of this, LV wiring has a lower risk of electric shock. It’s often used to power projects like landscape lighting, smart home systems and internet connections.

You can find LV wiring in different thicknesses, with thicker wires transmitting electricity for longer distances. Low-voltage wiring experiences a voltage drop, which is when the strength of the voltage decreases the farther it travels along the wire because of friction. Thinner wires have a faster voltage drop.

The best way to combat voltage drop is to estimate how much voltage you need to power your piece of equipment and confirm that the wire you choose is thick enough to carry that amount of voltage to its destination. You can use a voltage calculator to determine how much voltage you will need for different types of landscape lighting.

How to Wire Low-Voltage Lighting for Landscaping

If you’re working on landscape light wiring, there are several steps you can follow to make the process easier. First, it’s important to understand exactly what your client wants. Have them explain the effect they are looking for and ask if they can share reference photos with you. Once you understand their vision, you can take action to make it happen.

Collect Landscape Lighting Equipment

To install low-voltage wire for landscaping lights, you need some specific equipment, including:

• Transformers
• Lights
• Low-voltage wire
• Connectors
• A wire stripper

You may also need clips or screws to attach the transformers to the side of the building, where they will be off the ground and safe from the elements.

Make a Wiring Plan

Once you’ve chosen the best lights to fulfill your client’s vision, calculate how much voltage you need to power them. You can divide them into zones powered by several transformers or connect them all to the same transformer. The best option depends on your client’s design goals and exterior electric outlets.

Transformers come in different strengths, so you can choose the right transformer after you know how many lights each one needs to power. Each transformer will need to be plugged into an exterior outlet. Then, connect the low-voltage wire to the transformer and run that wire to each landscaping light.

Choose a transformer that offers slightly more power than what the project demands. Cutting it close isn’t a good idea with landscaping lights, especially since low-voltage wires experience voltage drop. If you’re working with long distances, use thicker wires to help the electricity travel to the light without disruption.

Connect Low-Voltage Wires

To connect the wires, use the wire stripper to remove about a half-inch of the wire casing. Most low-voltage wiring is actually two wires that are wrapped together. Connect the ends of these wires to the transformer, then run the wire to the landscaping light. Use a wire connector to attach the wire end to the light.

The best wire configuration depends on how many lights you are connecting to one transformer and how far away these lights are from the transformer’s power supply. You can splice several wires together by stripping off about a half-inch of their wire casing and twisting them together in the same direction. After you have spliced the wires, seal them with a connector.

Low-voltage wires don’t have positive and negative ends, so you don’t have to worry about which ones you’re connecting to each other. However, it’s important to consider how far the voltage has to travel and how many lights you are powering with a single transformer.

Test and Bury the Wires

Once you have connected all the lights to the transformers, try turning them on. Make sure everything works and that the lights are as strong as you need them to be. Once you have tested the connections, bury the wires under mulch or soil. They don’t need to be deep, just buried enough to be out of sight and protected.

Depending on the transformers you choose, you may be able to set a timer for when landscaping lights come on. Some transformers are automatic and will turn lights on when it begins to get dark. Ask your clients how they would like you to set up their landscaping lights, then talk them through how to use the system.

Safety Considerations for Low-Voltage Wiring

Because the voltage is low, working with low-voltage wiring is generally safer than other electrical jobs. However, there are some precautions you should take before you begin installation:

• Disconnect the power. You should never work on wires that are plugged into a power source without first shutting it off. Remember to turn off the transformers if you have to make adjustments during the testing period.
• Don’t work when it’s wet. You shouldn’t mix electricity and water, so postpone the job if it’s raining or the project site is wet. It’s safer to work on landscape wiring when the sun is out.
• Read the instructions. Before you get started, read through all of the instructions for the transformers and lights. Every piece of equipment is different, so it’s a good idea to check before you start cutting and splicing wires.

When purchasing low-voltage wire for a landscaping project, ensure you buy cable designed to be buried underground. Regardless of the system’s total load, it’s important to be careful whenever you’re working with electricity.

Find Quality Landscape Lights at Brilliance LED

At Brilliance LED, we support electrical contractors and landscape lighting experts with high-quality LED lamps and fixtures. Our products are designed to last, require minimal maintenance and can save your clients on energy costs. When you work with us, you’ll experience superior customer service, clear communication and satisfaction with our products.

It’s our mission to make landscape lighting easy, sustainable and durable through beautiful fixtures that enhance client properties and meet all their expectations. Apply to become a distributor with us, or use our virtual map to find a distributor near you!