How Long Can You Extend the Lead on the Snowmelt System?
Snow Melting Mat – WSMM
Maximum Length to Extend Snowmelt Systems Lead
In order to reach your controller or junction box, your electrician will extend the lead(s) of your snowmelt mats or cables in some cases. Warmup recommends 90 feet as the maximum length. Please refer to the installation manual for further information regarding the installation of your snowmelt system.