Overview
The Hoffman 99401-252 door interlock handle kit provides a reliable mechanical solution for controlling access to electrical enclosures and industrial equipment panels. This kit integrates a door handle mechanism with an interlock function that prevents unauthorized or unsafe access when equipment is energized. Built to meet industrial safety standards, the Hoffman 99401-252 is designed for field installation on standard enclosure doors and ensures personnel protection during maintenance and operation.
Key Features
- Mechanical interlock mechanism prevents door opening when main power is engaged
- Heavy-gauge steel construction for durability in industrial environments
- Drop-in replacement for compatible Hoffman enclosure models
- Field-installable design with included mounting hardware
- Supports both clockwise and counterclockwise door configurations
- Reduces risk of personnel contact with live electrical components
Technical Specifications
- Manufacturer: Hoffman (nVent)
- Part Number: 99401-252
- Product Type: Door Interlock Handle Kit
- Material: Zinc-plated steel
- Installation: Field-installable on enclosure doors
- Handle Type: External mechanical handle
- Pack Quantity: 1 kit with mounting hardware
- Standard Compatibility: NEMA Type 1, 4, 4X, 12 enclosures
Typical Applications
- Electrical control panels and disconnect enclosures
- Industrial machinery safety systems
- Distribution boxes and switch gear cabinets
- HVAC and process control enclosures
- Manufacturing facilities requiring personnel lockout/tagout compliance
Compatibility & Replacements
Compatible With
- Hoffman NEMA Type 1 enclosures
- Hoffman NEMA Type 4 and 4X stainless enclosures
- Hoffman NEMA Type 12 industrial enclosures
- Standard Hoffman door latching mechanisms
- Floor-standing and wall-mounted electrical boxes
Replaces / Drop-In Replacement For
- Hoffman 99401-262 (similar generation handle kit)
- Compatible with legacy Hoffman enclosure models with standard door bars
- Verify compatibility with your specific enclosure model before ordering
Works With
- Standard mechanical door latching systems
- Hoffman electrical interlock solenoids (optional upgrade)
- NEMA and IEC-compliant safety protocols
- Lockout/tagout (LOTO) safety procedures
