Any system under 200 watts will be fine using 16 gauge wire.
Landscape lighting wire gauge. Here is a chart of the cable types and their constants. Besides the gauge size plays a huge role when calculating the maximum voltage drop. If youd rather choose one wire gauge without doing any upfront calculations before purchasing it you.
The lower the number the thicker the wire and the greater its capacity. You will often see landscape lighting wire called 122 or 102 the 2 stands for conductors which is the number of wires inside the outer insulation. Multiply total wattage by total length.
Smaller wire sizes are often more economical and larger wire sizes are stronger however the smaller ones will also reduce the distance of power being provided to your lights in the ground and may require conduit to stay safe. Additionally when considering what wire gauge to use for your landscape lighting design installation its best to understand that different gauges have their own pros and cons. Landscape lighting wiring involves many gauge sizes with the commonest being 8 10 12 14 16 and 18.
Common wires for landscape lighting are 10- 12- 14- or 16-gauge wires. What gauge wire should I use for landscape lighting. The sequence of connecting one fixture to the other is also of utmost importance.
Most household lighting fixture as well as many appliances requires about 12- or 14-gauge wire. Mike Gambino owns and operates Gambino Landscape Lighting in Simi Valley Calif. This is usually indicated as a number and a dash and then another number.
Common wires for landscape lighting are 10- 12- 14- or 16- gauge wires. Write it all down on your plan. Wire gauge is a standard cable diameter measurement.

