The Square D by Schneider Electric brand Heavy Duty Safety Switch is designed to be tough, reliable and provide exceptional performance in the most grueling conditions. Heavy duty switches are the ideal for your electrical disconnect and protection for all your commercial and industrial needs. Heavy duty switches come with many different type of accessories and spare part kits. This line side barrier kit is for use with 2 and 3-pole heavy duty switches. The barrier kit has a 600 voltage rating and can be used in switches rated at 400A to 600A. This accessory is UL rated and certified.