Heavy Duty Safety Switches

Square D heavy duty safety switches are designed for commercial and industrial applications where maximum performance and continuity of service is vital. Like our general duty switches, they too can provide over-current and short circuit protection when equipped with fuses. When equipped with either a factory-installed solid neutral assembly or a field-installed equipment grounding list (some exceptions apply), the switches are also suitable for use as service equipment.

Heavy duty safety switches feature:

• Visible switch blades with for positive "OFF" indication
• Quick-make, quick-break operating mechanisms
• Dual cover interlock
• Color coded "ON" - "OFF" indicator handle
• Cover padlock hasp and handle lock "OFF" provision for multiple padlocks
• 240 VAC or 600 VAC maximum
• 30A - 1200A
• Fusible or not fusible
• Up to 200,000 rms symmetrical amperes SCCR, utilizing appropriately rated Class R fuses and Class R fuse kits or Class L, Class J fuses
• Horsepower rated for motor applications
• Spring reinforced plated copper fuse clips
• Tangential combination knockouts
• Enclosures available are NEMA Types 1; 3R; 4-4X-5 stainless; 4X fiberglass, cast aluminum, KRYDON; 12 and 12K; 7 and 9.
• Insulated, bondable solid neutral assemblies
• Wire terminations suitable for aluminum or copper conductors
• UL listed
• Meet or exceed NEMA KS1-1999

Special Application Heavy Duty Safety Switches

	Cast Aluminum Enclosures-NEMA Type 3, 3R, 4, 4X, 12 Ideally suited for heavy duty industrial applications. Copper free cast aluminum enclosures with epoxy powder coating inside and outside. Gasketed design enclosures are watertight, corrosive resistant and impervious to dust, rain and splashing liquids.
	Fiberglass Reinforced Polyester Enclosures-NEMA Type 4X Fiberglass reinforced polyester enclosures are watertight, corrosion resistant and impervious to windblown dust, rain and splashing liquid. The molded fiberglass is extremely stable in a wide range of operating temperatures and can withstand heavy impact. Switches are furnished with hubs and equipment ground lugs. UL Listed.
	KRYDON Enclosures - NEMA Type 4X KRYDON enclosures are compression molded of fiberglass reinforced polyester, especially formulated to withstand attack from almost any corrosive atmosphere found in the toughest industrial application. Switches are furnished with hubs and equipment ground lugs. UL Listed.
	NEMA Type 7 and 9 An enclosed automatic molded case switch for use in a Class I, Groups C and D; Class II, Groups E, F and G; or Class III, Hazardous Locations as defined in NEC Article 500. Furnished with threaded conduit openings in both top and bottom endwall. Suitable for use as service equipment and listed as "Raintight'' for outdoor applications. UL Listed, and CSA Certified.
	Receptacle Switches Interlocked Receptacle Switches are furnished with a factory installed 3 Phase 4 wire Appleton POWERTITE, Crouse-Hinds Style 2 ARKTITE, or Hubbellock receptacle. The fourth wire is connected to the switch equipment ground terminal and is not a neutral termination. Interlocking linkage between the receptacle and switch mechanism prevents insertion or removal of the plug while the switch is in the "ON'' position or insertion of any plug other than specified.
	Square D® MD50 Motor Disconnect Switch, Non-Fusible The MD50 is a Pin and Sleeve Interlocked Switch Receptacle listed UL508 "Suitable For Use As A Motor Disconnect" switch and receptacle in one compact NEMA 4X enclosure. The MD50 is offered in 20, 30, 60, and 100 Amps units compatible with IEC 309-2 plug configurations. Get more information . . .

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