UL 891 Low Voltage Panelboards
Our UL 891 listed Low Voltage Panelboards deliver reliable power distribution from 225A to 4,000A bus ratings in Type 1, 3R, 4, or 4X enclosures engineered for demanding industrial environments. Featuring silver-plated copper bus, thermal magnetic or electronic circuit breakers, and short circuit ratings up to 100kA at 480V, each unit handles 600VAC or 250VDC systems with neutral ratings up to 200% for 4-wire configurations.
Available in carbon steel, aluminum, or stainless-steel construction with freestanding, wall-mounted, or switchboard-section configurations, these panelboards integrate premium surge protection, metering, and monitoring components to meet your exact specifications. Every unit receives comprehensive factory function testing and ships ready for indoor or outdoor deployment. From industrial facilities and energy operations to commercial buildings and critical infrastructure, MCI Power Products & Controls Solutions delivers the customization, durability, and ANSI/IEEE/NEMA compliant electrical protection your facility demands.
Write a Review
UL 891 Low Voltage Panelboards
High-Capacity Panelboards: Metering, Surge, Monitoring
Blind power distribution leaves you vulnerable to equipment damage, energy waste, and problems that escalate undetected. MCI Power Products & Controls Solutions panelboards integrate revenue-grade metering, surge protection, and monitoring in UL 891 systems up to 4000A, 600VAC/250VDC—delivering visibility and protection that prevent costly failures before they happen.
Silver-plated copper bus, NEMA 1/3R/4/4X enclosures, and 3- or 4-wire configurations (neutral to 200%) with optional portable power (UL 1640). Indoor or outdoor with climate control. Factory-tested and ready to manage power proactively.
Industrial LV Panelboards — Climate-Controlled Enclosures
Temperature extremes, moisture, and contaminants destroy unprotected electrical equipment in industrial environments. MCI Power Products & Controls Solutions panelboards feature climate-controlled NEMA 1/3R/4/4X enclosures that protect sensitive components and ensure reliable operation in the harshest conditions—from arctic cold to desert heat, coastal corrosion to chemical processing plants.
Environmental Protection
Climate control options maintain optimal operating temperatures, preventing condensation, component degradation, and thermal failures. NEMA 3R/4/4X ratings protect against rain, snow, ice, windblown dust, and corrosive atmospheres—extending equipment life and preventing costly environment-related failures.
Rugged Construction
Carbon steel, aluminum, or stainless steel enclosures with powder coating meeting 1500+ or 3000+ hour salt spray requirements. Silver-plated copper bus minimizes heat rise and resistance. Available as freestanding, wall-mounted, or switchboard sections with multiple access configurations.
High-Capacity Distribution
Up to 4000A with 100kA SCCR @ 480V. 3- or 4-wire configurations (neutral to 200%) for high harmonic loads. Integrated surge protection, metering, and monitoring. UL 891 / cUL listed with thermal magnetic or electronic circuit breakers rated 80% or 100%.
Application Flexibility
Indoor or outdoor deployment with custom dimensions and layouts. Portable power options with cam-locks and UL 1640 listings for temporary installations. Factory-tested and ready for manufacturing plants, utilities, oil and gas, chemical processing, and severe-duty applications where standard equipment fails.
UL 891 Low Voltage Panelboards — Technical Specifications
- Standards & Listings UL 891, UL/cUL Listed; Optional UL 1640 for portable builds
- Ampacity Up to 4000A
- System Voltage 600VAC / 250VDC
- Short-Circuit Rating Up to 100kA @ 480V (SCCR)
- Configurations 3- or 4-Wire; Neutral rated up to 200%
- Bus Material Silver-plated copper bus
- Enclosure Ratings NEMA 1 / 3R / 4 / 4X; Indoor or Outdoor; Optional climate control
- Mounting Styles Freestanding, Wall, or Section-mounted
- Construction Materials Carbon Steel, Aluminum, or Stainless Steel
- Protection & Metering Integrated surge protection, metering & monitoring options
- Portable Power Options Cam-locks, UL 1640 configurations for temporary power
- Finish Durable powder-coat; custom colors available
- Customization Custom dimensions & layouts to match site requirements
- Quality & Test 100% functional testing prior to shipment
Ready to Configure Your
UL 891 Low Voltage Panelboard?
Specify a low voltage panelboard built to your site requirements—up to 4000A, 600VAC / 250VDC, with NEMA 1 / 3R / 4 / 4X enclosures, silver-plated copper bus, and options for surge protection, metering & monitoring, climate control, and portable cam-lock builds (UL 1640).