NQ Panelboards provide a broad range of solutions available from distributor stock to address electrical contractor's need. NQ Panelboards have modular construction to accept field installable accessories and conversion kits. This panelboard accessory is a crimp main lug kit. This 400 A tin plated copper lug will except 400 to 750 kcmil copper wire. Kit is UL listed and CSA certified by UL.