STI Metal Protective Cabinet – Indoor Type 1 Enclosure Series
The STI Metal Protective Cabinet Series provides secure, indoor-rated enclosures for electrical and electronic equipment up to 1000V. Constructed from powder-coated steel to resist corrosion, these Type 1 UL/cUL Listed cabinets protect against accidental or intentional damage while ensuring easy access for authorized personnel. The heavy-duty design includes a continuous piano hinge, built-in document holder, and multiple knockouts for versatile wiring. Available in various sizes and colors with optional locks and backplates, these cabinets are ideal for industrial, commercial, and institutional applications.
Key Features:
- UL & cUL Listed, Type 1 indoor enclosure
- Heavy-duty powder-coated metal construction for corrosion resistance
- Continuous piano-type hinge for durability
- Integrated document holder with pen/key attachment
- Multiple 1/2” and 3/4” knockouts (top, side, bottom)
- Mounts directly to wall; accommodates uneven surfaces
- Available in multiple sizes and gauges (17 or 18 gauge steel)
- Optional key or thumb lock (sold separately)
- Optional steel backplates available for mounting inside cabinet
- Custom printing available on request









