Feature List Extrusion Constructed of 0.06" extruded aluminum with 0.045" PVC bus bar support holding 12 gauge round bus bars. Polarity groove is located on face of track to indicate location of grounding conductor.Electrical Single circuit power distribution system designed to supply lighting unit flexibly. Single hot and neutral conductors are rated for max. 20 Amps. Copper electrical conductors are concealed in thermo-plastic, low-profile track section.Mounting This track is surface mounted using the supplied mounting hardware.Compatibility Track system is compatible with all A-Line® and Juno® style track fixtures, accessories and connectors.Labels cULus listed.