Abb th4322 Heavy Duty Fusible Safety Switch 60A 3P 240V

Product Description

The ABB th4322 is a heavy-duty fusible safety switch rated for 60 amps at 240 volts AC across three poles. It is designed for commercial and industrial electrical distribution systems where a reliable, code-compliant disconnect is required. The switch ships in a NEMA 1 enclosure for indoor installations and supports a 4-wire configuration. Licensed electricians install this switch as a service entrance disconnect, motor disconnect, or branch circuit isolation point. Key ratings include 3 horsepower at 240 Vac single-phase under NEC standard fusing and 7.5 horsepower at 240 Vac three-phase under NEC standard fusing, with higher horsepower ratings available using time-delay fusing.

The th4322 is suited for light commercial and industrial applications where a robust indoor fusible disconnect is needed. Typical installation scenarios include motor branch circuits, HVAC equipment disconnects, and panel feeder isolation in commercial buildings. The switch accommodates copper or aluminum conductors ranging from 12 to 2 AWG, making it compatible with a broad range of field wiring conditions. It carries GSA compliance, making it eligible for government and federally funded projects.

Key Features

• 60-amp, 3-pole fusible disconnect rated for 240 volts AC and 250 volts DC
• NEMA 1 indoor enclosure for general-purpose protected environments
• Accepts copper or aluminum conductors from 12 to 2 AWG
• Time-delay fusing supports up to 10 hp single-phase and 15 hp three-phase at 240 Vac
• GSA-compliant for use on government and federally funded projects
• Heavy-duty category construction suited for commercial and industrial service

Compatibility

Designed as an OEM-style heavy-duty fusible safety switch for commercial and industrial electrical distribution applications requiring a 60-amp, 3-pole, 240-volt indoor disconnect.

Installation Notes

Installation must be performed by a licensed electrician in accordance with the National Electrical Code (NEC) and all applicable local codes. De-energize the upstream circuit and verify absence of voltage with a meter before beginning any wiring work. Ensure the enclosure is mounted securely to a vertical surface with the operating handle accessible and unobstructed. Fuse selection must match the load type and motor horsepower rating per NEC requirements for the specific application.

Technical Specifications

• Amperage: 60 amps
• Voltage: 240 volts AC
• DC Voltage Rating: 250 volts DC
• Poles: 3
• Wires: 4
• Fusing: Fusible
• Enclosure: NEMA 1 (Indoor)
• Wire Range (Cu/Al): 12 to 2 AWG
• Motor Rating 240 Vac NEC Standard 1-Phase: 3 hp
• Motor Rating 240 Vac NEC Standard 3-Phase: 7.5 hp
• Motor Rating 240 Vac Time Delay 1-Phase: 10 hp
• Motor Rating 240 Vac Time Delay 3-Phase: 15 hp
• Motor Rating 250 Vdc: 10 hp
• Category: Heavy Duty
• GSA Compliance: Yes

Standard Information

• Brand: ABB
• Manufacturer Part Number: th4322