Specify professional grade, waterproof, moisture resistant wire nuts for your connections.
Since landscape and hardscape lighting cables are buried underground, implementing the correct waterproof splice is important. Do not use insulation displacement or pierce point connectors as moisture will enter the cable, which will corrode and cause electrical resistance, ultimately compromising your system.
low voltage cable
Low voltage cable connects the transformer to the lighting fixtures. A gauge of 12/2 is recommended in typical landscape lighting applications.