Surge protection is vital to the reliable operation of the Irrigander Pro family of irrigation expanders. The Irrigander Pro expander Decoders and Encoders use metal oxide varistor (MOV) surge suppression technology to minimize the potential damage from lightning and other electrical surges. This is the same surge protection technology found in surge protection power strips used to protect computers and other sensitive electronic devices. While this protection is very reliable, proper installation of the Irrigander Pro expander system will enhance this protection. Field cable runs longer than 300 feet should have Irrigander Surge Suppressors added according to the table below. Refer to the specific Irrigander Pro expander User Guide located in our Support section for more details on proper installation of the Irrigander Pro expander system to maximize protection against lightning. Please contact our team if you have any questions regarding installation of an Irrigander Pro expander system.