Siemens NRH323 Heavy Duty Safety Switch Type 3R is a 100 A, three-pole, four-wire disconnect designed for outdoor use in 240 V electrical systems. Housed in a NEMA 3R outdoor enclosure, it provides safe isolation for feeders to motors, transformers, or other equipment in industrial or commercial installations. Related Siemens catalog variants—such as GF323NRA, a 100 A, 3P, 4W, 240 V Type 3R outdoor safety switch (fusible), and HF323NR—confirm the 3R outdoor rating and 100 A, 3P, 4W configuration.
