Schneider Electric's Square D heavy duty safety switch is designed to be tough, reliable and provide exceptional performance in the most grueling conditions. They have been designed to have a significantly higher durability than a standard switch and have a durability three times greater than NEMA standard making it ideal for all your commercial and industrial needs. All heavy duty safety switches feature a quick-make, quick-break operating mechanism, a dual cover interlock, and a color coded indicator handle. This three blade non-fusible heavy duty safety switch that is rated at 100A with a voltage 600 VAC and 600 VDC. This short circuit rating for a non-fusible switches is based upon the Square D circuit breakers or Mag-Gard motor circuit protectors chosen as upstream protection This switch is Type 3R rated with a galvannealed steel enclosure and comes with factory installed viewing window and are surface mounted. The safety switch has a 4-wire configuration with 3 poles and one solid neutral that is factory installed. The disconnect does not come with lugs that are grounded and must be done in the field using a grounding kit. The wire range for this switch is AWG 6…250 kcmil aluminium and copper. All heavy duty safety switches are tested per UL98 and NEMA KS1 standards and listed in the UL files E2875 and E154828.