53 Spec-Setter™ 3-Pole Heavy-duty safety switch is rated at 600-Volt AC and 600-Amps. Non-fusible switch accommodates two copper/aluminum conductors of size 4 - 500-AWG. It has maximum load capacity of 200 hp at 240-Volt AC, 400 hp at 480-Volt AC and 500 hp at 600-Volt AC. It operates at the frequency rating of 50/60-Hz. It measures 53.5-Inch x 23-Inch x 8.5-Inch. Switch is suitable for using as service equipment when installed in accordance with the National Electrical Code. It involves quick-make and quick-break mechanism.