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 30A 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 4X rated with a stainless 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 factory installed equipment ground lugs. The wire range for this switch is AWG 12...AWG 6 aluminium and AWG 14...AWG 6 copper. All heavy duty safety switches are tested per UL98 and NEMA KS1 standards and listed in the UL files E2875 and E154828.