General Duty Switches — Up to 100 kA SCCR

240 Volt general duty safety switches are suitable for use as service equipment when equipped with a factory or field-installed neutral assembly or a field-installed service grounding kit, (see Equipment Grounding Kits) as applicable. General duty safety switches are UL Listed, File E2875, and meet or exceed the NEMA Standard KS1.

Selection:

• Fusible switches: See 240 Volt Fusible General Duty Safety Switches

• Non-Fusible switches: See 240 Volt Non-Fusible General Duty Safety Switches

Additional information for light duty safety switches:

Online Product Selector: Safety Switches Product Selector

Product Catalog 3100CT1602: Square D Enclosed Safety Switches Catalog

Product Range: General Duty/Light Duty Safety Switches

D223N Fusible NEMA Type 1 General Duty Switch	D224NRB Fusible NEMA Type 3R General Duty Switch	DU323RB Non-Fusible NEMA Type 3R General Duty Switch

D223N Safety Switch

The General Duty 240 V Fusible Safety Switches specifications table outlines disconnect switch options used in low-voltage power distribution and motor disconnect applications. It covers 2-wire, 3-wire, and 4-wire configurations with ampere ratings ranging from 30 A to 800 A. The table lists enclosure types, catalog numbers, fuse compatibility, and horsepower ratings for various motor loads. Supported fuse classes include Class R, J, and L, with some models supplied factory-fused or requiring field installation. The specification also identifies UL-listed maximum short-circuit current ratings up to 100 kA, depending on the fuse class used. This reference is intended for electrical engineers, contractors, and facility managers selecting NEC- and UL-compliant disconnect switches for commercial, industrial, and utility applications.

Example Fuse Rejection Kit RFK10

240 Volt General Duty Fusible Single Throw Safety Switches

System	Amperes	NEMA TYPE 1	NEMA Type 3R [1]	Class R Fuse Kits [2]	Line Side Barrier	Horsepower Ratings
						Std. (Fast Acting One-Time Fuses		Max. (Dual Element Time-Delay Fuses)
		Cat. No.	Cat. No.	Cat. No.		Single-phase	Three-phase	Single-phase	Three-phase
2 Wire (1 Blade and Fuseholder, 1 Neutral)—120 Vac
Use Light Duty Devices or use three-wire devices
3 Wire (2 Blade and Fuseholder, 1 Neutral) – 120/240 Vac Plug Type Fuses
	30	D211N	D211NRB	—	—	1-1/2	—	3	—
3 Wire (2 Blade and Fuseholder, 1 Neutral) –240 Vac Cart. Type Fuses
	30	D221N	D221NRB	DRK30	—	1-1/2	3 [3]	3	7-1/2 [3]
	60	D222N	D222NRB	RFK03H	Factory Included	3	7-1/2 [3]	10	15 [3]
	100	D223N	D223NRB	RFK10	Factory Included	7–1/2	15 [3]	15	30 [3]
	200	D224N [4]	D224NRB [4]	HRK1020	Factory Included	15	25 [3]	—	60 [3]
	400	D225N	D225NR	DRK40	LSBI02	—	—	—	—
	600 [5]	D226N	D226NR	DRK600	LSBI02	—	—	—	—
4 Wire (3 Blade and Fuseholder, 1 Neutral) –240 Vac Cart. Type Fuses
	30	D321N	D321NRB	DRK30	—	1-1/2	3	3	7-1/2
	60	D322N	D322NRB	RFK03H	Factory Included	3	7-1/2 [6]	10	15 [6]
	100	D323N	D323NRB	RFK10	Factory Included	7-1/2	15 [6]	15	30 [6]
	200	D324N [4]	D324NRB [4]	HRK1020	Factory Included	15	25 [6]	—	60 [6]
	400	D325N	D325NR	DRK40	LSBI02	—	50	—	—
	600 [5]	D326N	D326NR	DRK600	LSBI02	—	75	—	150
4 Wire (3 Blade and Fuseholder, 1 Neutral) –240 Vac CLASS T Type Fuses
	400 [7]	D325NT	D325NTR	DRK40	LSBI02	—	50	—	—
	600 [7]	D326NT	D326NTR	DRK600	LSBI02	—	75	—	150
	800 [7]	T327N	T327NR	—	LSBI02	—	100	—	—

DU323RB Safety Switch

The General Duty 240 V Non-Fusible Safety Switches specification table outlines disconnect switch options for 240 Vac electrical distribution systems in commercial and industrial applications. The document covers 2-wire (2-blade) and 3-wire (3-blade) configurations with current ratings from 30 A to 600 A and lists corresponding NEMA Type 1 and NEMA Type 3R catalog numbers. Included specifications identify available accessories such as equipment ground kits, neutral kits, line-side barriers, and factory-installed provisions. Horsepower ratings are provided for single-phase and three-phase motor loads, supporting motor disconnect and isolation requirements. The table also details UL-listed short-circuit current ratings (SCCR) ranging from 10 kA to 100 kA, based on the upstream circuit breaker or fuse class used. These non-fusible safety switches are designed for equipment isolation, maintenance disconnects, motor control applications, and NEC- and UL-compliant electrical installations requiring reliable overcurrent protection through separate upstream protective devices.

Example Grounding Kit GTK0610

240 Volt General Duty Non-Fusible Single Throw Safety Switches

System	Amperes	NEMA Type 1	NEMA Type 3R [1]	Line Side Barriers [9]	Equipment Ground Kit	Neutral Kit	Horsepower Ratings (Max.) Max. (Dual Element Time-Delay Fuses)
		Cat. No.	Cat. No.		Cat. No.		1Ø	3Ø
2 Wire (2 Blade)—240 Vac
	30	—	DU221RB	—	PK3GTA1	—	3	—
	60	—	DU222RB	—	GTK03	—	10	—
	100	Use three wire switch	—	—	—	—	—	—
	200		—	—	—	—	—	—
	400		—	—	—	—	—	—
	600		—	—	—	—	—	—
3 Wire (3 Blade)—240 Vac
	30	DU321	DU321RB	—	PK3GTA1	—	3	7-1/2
	60	DU322	DU322RB	—	GTK03	—	10	15
	100	DU323 [10]	DU323RB  [10]	Factory Included	GTK0610	—	10	30
	200	DU324  [11]	DU324RB  [11]	Factory Included	PKOGTA2	—	15	60
	400	DU325	—	LSBI02	PKOGTA2	—	—	125
	600	DU326  [12]	—	LSBI02	PKOGTA2	—	—	150

System equal or less than 10 kA SCCR — Any Brand of circuit breaker or fuse not exceeding the ampere rating of the switch may be used in conjunction with a non-fusible safety switch.

Systems above 10 kA SCCR — The UL listed short circuit current rating for Square D non-fusible switches is based upon the switch being used in conjunction with fuses or Square D circuit breakers or Mag-Gard motor circuit protection.