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Model 7426 Fused Disconnect Double-throw Switches

UL - U.S. Listed

Fused Disconnect Double-throw Switches


This equipment is specially designed and priced to connect and disconnect a load from a single-phase utility power source and switch to backup power.

This industry-first product puts everything you need in one box: “Made in the USA” Ronk reliability, simplicity, economy, and safety.

Best of all, its unique design load-break contact mechanism will not fail due to fouling, is non-jamming, includes a neutral bar and uses best-in-class type “T” fusing.

Tech Spec | Crank Mechanism Adjustment | Knockout Diagram


Model: 7426
Series: Fused Disconnect Double-throw Switches
Main Contacts: 400 A
Voltage: 240 Vac
Inerrupt Rating:
50 kAIC @240 V
Poles: 2 (double-pole – DP for single-phase current)
Weight: 74 lbs. (approx.)
Fuse: Class T – 400 A, 300 V (included standard)
Suitable for Use as Service
Equipment (SUSE):
Action: Double-throw (DT)
Mounting: Grade level
Neutral Bar: Included standard
Enclosure: NEMA 3R aluminum
Wire Range

NEMA 3R Enclosure

Enclosure Dimensions

Conduit Knockout Sizes (at bottom of switch)

  • (2) 2-1/2 in. – 3 in.
  • (3) 1-1/2 in. – 2 in.
  • (1) 1/2 in.
Line Lugs Load Lugs Neutral Bar
(2) 250 MCM – 1/0 or
(1) 600 MCM – #4 Cu-Al
(1-Hole Lug)
250 MCM – #6 Cu-Al
(4-Hole Lug)*
350 MCM – #6 Cu-Al
(6-Hole Bar)*

* Alternate available for 600 MCM conductor