Safety Switches EZ Selector - Selection Assistance
EZ-Selector
Steps to select a safety switch
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Select product type:
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General duty safety switch
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Heavy duty safety switch
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Double throw safety switch
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Select switch type.
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Select fuse type: fused, non-fused, cartridge, class T or plug
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Select maximum voltage: 240 Vac / 250 Vdc, 600 Vac / 600 Vdc
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Select amperes:
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General/light duty – 30 A, 60 A, 100 A, 200 A, 400 A, 800 A
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Heavy duty – 30 A, 60 A, 100 A, 200 A, 225 A, 400 A, 600 A, 800 A, 1200 A
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Double throw – 30 A, 60 A, 100 A, 200 A, 600 A
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Select number of poles:
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General/light duty – 1, 2 or 3
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Heavy duty – 2, 3, 4 or 6
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Double Throw– 2, 3, 4 or 6
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Select if neutral is needed.
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Select enclosure type:
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General/light duty – NEMA 1, NEMA 3R
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Heavy duty – NEMA1, NEMA 12K, NEMA 3R, 5, 12, NEMA 4, 4X, 5 (stainless steel 304), NEMA 4, 4X, 5 (stainless steel 316)
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Double throw – NEMA1, NEMA 12K, NEMA 3R, 5, 12, NEMA 4, 4X, 5 (stainless steel 304)
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Optional enclosure types for special heavy duty applications.
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Wiring Diagrams
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Fuse |
Fused with Neutral |
Non-Fused |
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Enclosure Options
Enclosure units are third party certified to UL 50E by Underwriters Laboratories
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Type 1 |
Design for indoor use provide degree of protection against access to hazardous parts, protects against ingress of solid foreign objects. |
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Type 3R |
Design for indoor or outdoor use provide degree of protection against access to hazardous parts, protects against ingress of solid foreign objects, degree of protection to due ingress of water (rain, sleet, snow) and will remain undamaged by external formation of ice. |
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Type 4X |
Design for indoor or outdoor use provide degree of protection against access to hazardous parts, prevents ingress of solid foreign objects, degree of protection to due ingress of water (rain, sleet, snow, splashing water, and hose directed water) and provides additional protection against corrosion, and will remain undamaged by external formation of ice. |
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Type 12 |
Design for indoor use provide degree of protection against access to hazardous parts, protects against ingress of solid foreign objects (falling dirt and circulating dust, ling, fibers, and flyings) provide degree of protection due to ingress of water (dripping and light splashing). |
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Class H, R, J, and L Fuse Provisions
Class R Fuse |
Plug Type Fuses: Fuses for standard circuits (not high-voltage appliance circuits) are called plug fuses and have screw-in bases. There are two different types of bases and screw-in fuses: the Edison base (found on Type T fuses) and the rejection base (found on Type S fuses).
Class H or K Fuse Provisions: Fusible Square D 30–600 A heavy duty safety switches accept Class H or K fuses as standard. With Class H or K fuses installed, the switch is UL Listed for use on systems with up to 10 kA available short circuit current.
Class R Fuse Provisions: Fusible Square D 30–600 A heavy duty safety switches will accept Class R fuses as standard. A field-installed rejection kit is available which, when installed, accepts only Class R fuses. With the installation of the rejection kit and Class R fuses, the switch is UL Listed for use on systems with up to 200 kA available short circuit current.
Class J Fuse Provisions: Provisions for installing Class J fuses are included in 30–400 A 600 Volt, and 100–400 A 240 Volt, fusible heavy duty safety switches. Conversion to Class J fuse spacing requires relocating the load side fuse base assembly from the standard Class H fuse location to an alternate position as marked in the enclosure. With Class J fuses installed, the switch is UL Listed for use on systems with up to 200 kA available short circuit current. Switches rated 600 A, 240 or 600 Volt require the addition of an adapter kit: H600J.
Class L Fuse Provisions: Fusible 800 and 1200 A safety switches use Class L bolt-in fuses and are rated for use on systems with up to 200 kA at 600 Vac maximum. 1200 A switches accept class L fuses from 601–1200 A, 800 A switches accept Class L fuses from 601–800 A.