Overview
The Hubbell HBL2515 Insulgrip twist-lock flanged inlet delivers reliable power distribution for three-phase industrial and commercial applications. This 20A inlet features NEMA L21-20P configuration rated for 120/208VAC 3-phase service. The back-wired termination design simplifies installation while maintaining a secure, lockable connection that resists accidental disconnection—critical for equipment that cannot tolerate unexpected power loss.
Key Features
- Back-wired terminations for fast, error-free installation
- #10-32 brass terminal screws with multiple drive options (Phillips, Slotted, Robertson)
- Tough nylon housing with single-piece dust shield for durability
- Twist-lock design prevents accidental pull-out or vibration-induced disconnection
- Includes all required mounting hardware
- Heavy-duty construction rated for factory, data center, and healthcare facility environments
Technical Specifications
- Current Rating: 20A
- Voltage Rating: 120/208VAC, 3-phase Y
- Configuration: 4-pole 5-wire with ground
- NEMA Standard: L21-20P
- Housing Material: Nylon
- Terminal Type: #10-32 brass screws (Phillips/Slotted/Robertson)
- Terminal Retainer: Clear polycarbonate
- Blade Material: Brass
- Operating Temperature: –40°C to 75°C (maximum continuous at 75°C)
- Certifications: UL 498, CSA C22.2 No.42, Fed. Spec. W-C-596
- Flange Diameter: 2.23 in × 2.27 in (L)
- Color: White
Typical Applications
The HBL2515 is widely deployed in industrial equipment, portable generators, welding machines, compressors, and temporary power distribution systems where three-phase 120/208V is required. It is also specified in healthcare facilities, manufacturing plants, data centers, and renovation/construction sites where reliable power cord management is essential. The twist-lock mechanism ensures equipment stays powered during vibration-prone or high-traffic environments.
Compatibility & Replacements
Compatible With
- Standard three-phase branch circuits rated 120/208VAC
- Equipment and cord assemblies with NEMA L21-20P female receptacles
- Industrial power distribution enclosures and outlet boxes
- Emergency backup generators and temporary power systems
- Heavy-duty portable equipment and machinery
Replaces / Drop-In Replacement For
The HBL2515 directly replaces worn, damaged, or non-compliant 20A 120/208V NEMA L21-20P twist-lock flanged inlets. Verify exact model compatibility with your equipment manufacturer or system integrator before ordering to ensure bolt-hole spacing and terminal configuration match your enclosure.
Works With
- NEMA L21-20P plugs and cord connectors
- Industrial control systems and branch circuit wiring
- Flex cable assemblies rated for 20A, 120/208VAC service
- Utility and portable power distribution equipment
- Auxiliary power panels and temporary service installations
