Graphite electrodes have been the subject of antidumping and countervailing duty proceedings targeting multiple origins. Importers should check the current scope of any active orders with the Department of Commerce and CBP before importing, as scope rulings can affect whether a particular electrode diameter or grade is covered.

A carbon brush with attached metal components (spring, shunt wire, or holder) is still classified under 854520 as long as the essential character is the carbon brush itself. The metal elements are incidental to the brush's function of conducting current between a stationary and rotating surface. If the assembly is more accurately described as a complete brush-holder unit, classification may shift — consult the heading notes or seek a binding ruling for complex assemblies.