Features0.06 in nominal wall thicknessSolid copper bus bars cross section equivalent to 12 AWG wireExtruded polyvinyl insulatorExclusive independent grounding bus conductorMaintains an independent positive ground 12 AWG path between lampholder, trac channel and building's ground systemCross section equivalent of 12 AWG wireVisual polarity groove indicates proper electrical installation of lampholder adapterTrack system is recommended for ceiling mount only, for alternate mounting methods consult factory12 ft nominal sizeMiniature track provides versatility for every lighting need