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 fusible heavy duty safety switch that is rated at 100A with a voltage 600 VAC and 600 VDC. This fusible disconnect has a short circuit rating of either 10kA or 200kA depending on fuses used. This switch is Type 1 rated with a steel enclosure and comes with factory installed viewing window. The device accepts H,K,R fuse types as shipped and can be field modified for J fuses, unit is surface mounted. The safety switch has a 4-wire configuration with 3 poles and one solid neutral that is factory installed. The disconnect comes with standard lugs that are not grounded but equipment grounding kits can be used make lugs grounded. The wire range for this switch is AWG 12...AWG 1/0 aluminium and AWG 14...AWG 1/0 copper. All heavy duty safety switches are tested per UL98 and NEMA KS1 standards and listed in the UL files E2875 and E154828.