Schneider Electric's Square D heavy duty safety switch is designed to be tough, reliable and provide exceptional performance in the most grueling conditions. All heavy duty safety switches feature a quick-make, quick-break operating mechanism, a dual cover interlock, and a color coded indicator handle. They also come with many field installable or factory installed accessories. This equipment grounding kit is one of the available accessories. The grounding bar is rated for 800A and has 4 terminals which accept 4 AWG to 350kcmil conductor. The grounding kits are UL listed.