UL 891 Integrated Distribution Switchboards

At Industrial Energy Partners, our UL 891 Integrated Distribution Switchboards are engineered for high-performance, code-compliant power distribution in mission-critical environments. Designed and built entirely in-house — and backed by our strategic partnership with IndustLabs — these switchboards deliver scalable, safe, and intelligent power for data centers, hospitals, industrial plants, and commercial facilities.

With full compliance to UL 891, UL 50, and NEC standards, our modular switchboards are built for the real world: ready to integrate smart controls, withstand extreme environments, and scale as your needs grow.

Quick-View Specification Table

Spec	Details
Standard	UL 891 (Low-Voltage Switchboards)
Voltage	Up to 600V AC
Bus Rating	400A – 6,000A+
Short-Circuit	Up to 150kAIC
Enclosures	NEMA 1, 3R, or 4X
Construction	Modular, Dead-front, Front/Rear Access
Compliance	UL 891, UL 50, NEC, NFPA, NEMA

General Specifications:

Designed as the main power distribution hub in commercial, industrial, and critical-use facilities

Available in indoor (NEMA 1) or outdoor (NEMA 3R, 4X) configurations
Modular layout supports expansion, easy access, and future-proofing
Enclosures built from powder-coated steel, aluminum, or stainless steel

All units include clear labeling, nameplates, and full documentation

Technical Specifications

Rated for up to 600V AC (1,000V max per UL 891)
Bus ampacity: 400A to 6,000A+ with custom builds
Short-circuit withstand rating: Up to 150kAIC (200kA on request)
Breaker types: UL 489 MCCBs or UL 1066 Power Breakers (main and feeders)
Feeder options: Breakers or fusible disconnects (group or individually mounted)
Bus bar materials: High-conductivity copper or aluminum with optional plating
Optional integration with:
- Automatic Transfer Switches (ATS)
- Load banks and temporary generator inputs
- Surge protection (SPD/TVSS)
- Energy meters, SCADA, and DCIM systems

CUSTOMIZATION OPTIONS

Every facility is different — and your switchboard should be too. That’s why our UL 891 Integrated Distribution Systems are built to order, with configurable layouts, components, and enclosure options to match your exact application, environment, and code requirements.

Enclosure & Construction

NEMA 1 (indoor), 3R (outdoor), or 4X (corrosive/hose-down)
Material options: powder-coated steel, aluminum, stainless steel
Front-only or front/rear access
Seismic-rated construction (optional)

Electrical Components

UL 489 Molded Case or UL 1066 Power Breakers
Main lug or main breaker configurations
Fusible switches or breakers for feeders
Bus bar options: copper or aluminum (with tin/silver plating)

Integrated Features

Automatic Transfer Switch (ATS)
Load bank connection (NEC 700.3(F) support)
Surge Protective Devices (SPD/TVSS)
Utility metering and energy monitoring
SCADA or DCIM integration

Layout & Design

Modular sections for future expansion
Custom dimensions for space-constrained rooms
Color-coded bus, labeling, and safety graphics
UV-printed nameplates and branding

Don’t see what you need? Our in-house engineering team will work with you to build a solution that meets both your technical and compliance requirements — no compromises.

Industry Certifications & Standards

UL 891 – Switchboards (≤1000V AC)
UL 50 / 50E – Enclosures and environmental protection
NEMA 1 / 3R / 4X – Indoor, outdoor, and corrosive environment ratings
NEC (NFPA 70) – National Electrical Code compliant
NFPA 70E – Electrical safety in the workplace (arc flash protection)
NFPA 110 – Emergency and standby power systems (for healthcare and critical facilities)
ANSI C37 / NEMA PB-2 – Low-voltage switchgear and switchboard construction
IEEE / ICC-ES AC-156 (Optional) – Seismic testing for critical facilities
CSA (Optional) – Canadian compliance available
EUSERC (Optional) – Utility-standard configurations where required

🏗️ Every unit ships with full documentation, testing reports, and certification labeling — making approvals and inspections faster and simpler.

FEATURES & BENEFITS

FEATURES & BENEFITS
Key Benefits at a Glance:

Modular, scalable design — built for future growth
Fully in-house engineered and manufactured in the USA
High short-circuit capacity (up to 150kAIC) for critical loads
Integrated ATS, surge protection, and metering availabl
Dead-front construction for enhanced operator safety
NEMA 1, 3R, and 4X enclosures — indoor and outdoor ready
Smart system-ready — SCADA, DCIM, and remote monitoring capable
Ships with all UL labels, diagrams, and testing documents

INDUSTRY APPLICATIONS (Condensed Format)

Our UL 891 Integrated Distribution Systems are trusted in:

Data Centers – Redundant power, smart monitoring, scalable design
Healthcare Facilities – Life-safety compliance, NFPA 110-ready, corrosion-resistant
Industrial Plants – High fault capacity, rugged enclosures, easy integration
Commercial Buildings – Centralized power, sub-metering, space-saving layouts
Construction & Infrastructure – Pre-tested, fast install, eHouse-ready

Hear From Our Customers - IEP

Facilities Manager, Tier III Data Center

★★★★★ “Seamless installation, solid build quality, and great support. The engineering team understood our spec from day one.”

Electrical Contractor, Healthcare Expansion Project

★★★★★ “We passed AHJ inspection without a single issue. Fully labeled, compliant, and clearly built with real-world use in mind.”

Project Engineer, Industrial Manufacturing Facility

★★★★★ “Flexible layout, clean documentation, and the ability to integrate our ATS and load bank directly saved time and money.”

Certified Manufacturer – Custom & Expedited