Overview
The General Electric TG4321 safety switch is a fusible general-duty disconnect engineered for reliable load isolation and protection. Rated at 30 amps, 240VAC, and 250VDC, this 3-pole switch features NEMA 1 (indoor) steel construction and is UL-listed for service entrance equipment when properly installed per the National Electrical Code.
Key Features
- Quick-make, quick-break mechanism provides positive ON/OFF indication and snap-action contact engagement
- Visible blade position confirmation—operators see plated blade contacts for immediate status verification
- Spring-reinforced fuse clips ensure reliable contact and cool operation
- Lockable cover and handle prevent unauthorized entry
- Class H, K, J, and R fuse compatible (Class R cartridge standard)
- Self-leveling, three-point mounting system simplifies installation
- Integral cover interlock for personnel safety
Technical Specifications
- Current Rating: 30 amperes
- Voltage: 240VAC / 250VDC
- Poles: 3
- Wires: 4-wire configuration
- Fuse Type: Cartridge, Class H/K/R (Class R recommended)
- Short-Circuit Rating: 10,000 rms symmetrical amps (standard); 100,000 rms symmetrical amps with Class R fuses installed
- Enclosure: NEMA 1 (indoor, wall-mount)
- Wire Capacity: 14–8 AWG copper; 12–8 AWG aluminum
- Dimensions: 10.3 in H × 6.4 in W × 3.3 in D
- Frequency: 50/60 Hz
- Power Rating: 1.5 hp (1-phase 240V), 3 hp (3-phase 240V), 5 hp (250/600V DC)
- Approvals: UL 98, CSA
Typical Applications
The TG4321 is ideal for disconnecting branch circuits and loads in commercial and light industrial facilities where safety, high performance, and service continuity are required. Common uses include:
- Motor disconnects for HVAC and pump systems
- Lighting circuit isolation and control
- Equipment protection in workshops and utility applications
- Service entrance applications (when installed per NEC requirements)
- General-duty load switching in control panels and distribution systems
Compatibility & Replacements
Compatible With
- Class H, K, J, and R cartridge fuses
- Standard electrical panel installations (NEMA 1 indoor enclosures)
- 240VAC single-phase and three-phase power systems
- 250VDC circuits and equipment
- Branch circuit and feeder applications per NEC Article 422 and 430
Replaces / Drop-In Replacement For
- Earlier GE Spec-Setter TG-series fusible switches (30A configurations)
- Older general-duty disconnect switches with equivalent amp ratings
- Verify compatibility with your installed load and fuse rating before ordering
Works With
- UL-listed cartridge fuses (Class H, K, J, R)
- Standard 240VAC/250VDC electrical distribution systems
- NEC-compliant installations as service entrance equipment
- Spring-contact fuse holders and standard electrical enclosures
