Product Overview
SAI's UL 891 Series 1 Switchboard is a compact, panel-interior power distribution solution engineered for commercial, industrial, and institutional applications requiring reliable low-voltage distribution. Built around SAI's proprietary Universal Power Panel Interior, the design provides high fault-current performance, flexible configurations, and a space-efficient footprint while maintaining compliance with UL 891 requirements.
Technical Specifications
- Ampacity: Up to 4000A
- Short-Circuit Rating: Up to 100kAIC
- Breaker Type: UL 489 Molded Case Circuit Breakers (all major manufacturers)
- Agency Listing: UL 891
- Access: Front access only
- Cable Entry: Top or bottom
- Enclosure Options: NEMA 1 and NEMA 3R
- Construction: SAI Proprietary Universal Power Panel Interior
- Seismic Certification: Tested and certified to IBC 2015 and CBC 2016 with component importance factor of 1.5
- Finish Options
- Standard and custom color selections available at no extra cost
- Build America Buy America (BABA) Compliant
Benefits
UL 1558 is the recognized safety and performance standard for low voltage metal-enclosed switchgear used in critical power distribution systems. Switchgear built to UL 1558 specifications delivers enhanced reliability, safety, and scalability for demanding electrical environments.
☑ UL Approved
☑ High Short-Circuit Current Ratings
☑ Flexible Protection
☑ Optimized Bus System Design
High-Density Distribution Design
Delivers up to 4000A and 100kAIC fault-current performance within a compact switchboard footprint.
Flexible Circuit Breaker Integration
Supports UL 489 molded-case breakers from major manufacturers for application-specific protection schemes.
Optimized Installation Flexibility
Available with top or bottom cable entry to simplify field installation and feeder routing.
Space-Efficient Architecture
Universal Power Panel Interior maximizes circuit capacity while minimizing enclosure size.
Seismic-Qualified Construction
Independently tested to IBC 2015 and CBC 2016 requirements for critical infrastructure applications.
Indoor & Outdoor Enclosure Options
Offered in NEMA 1 and NEMA 3R enclosures to accommodate a wide range of operating environments.