Special FeaturesA-Series Panelboards. Pro-Stock, Unassembled Lighting Panels. Main Lug Kits. Select lug kit(s) for main lug and/or feed-thru applications, if required. All lugs are suitable for interiors with either copper or aluminum bus. Also select any accessories required. Lug Type - Pressure. Wire Size - 2-600 MCM or (2) 1/0-250 MCM.