Using two circuit trac heads (on a two circuit trac) offers the ability to operate each circuit separately. Suitable for a wide range of commercial merchandising and residential applications. All PLC trac heads are constructed to fit on one circuit or two circuit "TR" trac system. It is offered in different sizes and either a black or white finish. Tracks include 1 dead end cap and mounting hardware, please see the options below. This track is for a three wire system only.