Safety Switches Product Description SAFETY SWITCH A safety switch is used to open or close an electrical circuit. Non-fusible safety switches provide a means to manually connect or disconnect the equipment from the power source. Fusible safety switches pro- vide a means to manually open and close a circuit and overcurrent protection by using customer-installed DP221NGB Plug Fuse Safety Switch, fuses. Safety switches are also commonly referred 30 Amperes, 120/240 Volts to as a disconnect switch or simply a disconnect. DOUBLE THROW SAFETY SWITCH A double throw safety switch is sometimes referred to as a transfer switch. It performs the same function as a safety switch by opening or closing a circuit however, its primary use is to transfer service from a normal power source to an alternate source (i.e., a residential generator) or to switch from one load circuit to another. Features, Functions and Benets DG322URB General-Duty, Non-Fusible Safety Switch, 120/240, 240 or 600 volts. 60 Amperes, 240 Volts Easy to install. Ample wiring space. Padlockable. UL listed. DT224URK-NPS General-Duty, Non-Fusible Double Throw Emergency Power Safety Switch, 200 Amperes, 120/240 Volts DH362UGK Heavy-Duty, Non-Fusible Safety Switch, 60 Amperes, 600 Volts EATON CORPORATION Cutler-Hammer 6-7 DisconnectsApplications FIGURE 6-3. RESIDENTIAL GENERATOR APPLICATION WITH MANUALLY OPERATED DOUBLE THROW SAFETY SWITCH FIGURE 6-2. HOUSEHOLD WORKBENCH APPLICATION FIGURE 6-4. RESIDENTIAL GENERATOR APPLICATION WITH AUTOMATIC TRANSFER SWITCH AND SERVICE ENTRANCE RATED SAFETY SWITCH Catalog Numbering System TABLE 6-14. SAFETY SWITCH CATALOG NUMBERING SYSTEM DG 2 2 1 N R B Switch Type Series Poles/Blades NEMA Enclosure Ratings DP = General-Duty/Plug Fuse K = Design (All General-Duty Switches DG = General-Duty/Cartridge Fuse Above 200 Amperes and All Heavy-Duty 1 = 1-Pole G = NEMA 1 Amperes DH = Heavy-Duty Switches Incorporate K-Series Switch 2 = 2-Pole R = NEMA 3R DT = Double Throw 1=30 Design Features Listed Below) 3 = 3-Pole D = NEMA 12 2=60 B = Design General-Duty (30 100 Amperes) 4 = 4-Pole W = NEMA 4X 3 = 100 H = General-Duty Double Throw Switch Corrosion Resistant 4 = 200 (Compact Design 30 100 Amperes) (304 Grade Stainless Steel) Voltage 5 = 400 6 = 600 1 = 120 Vac Fusible/Non-Fusible 7 = 800 2 = 240 Vac or Neutral 8 = 1200 6 = 600 Vac F = Fusible without Neutral U = Non-Fusible N = Fusible with Neutral EATON CORPORATION Cutler-Hammer 6-9 Disconnects