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A UL 891 switchboard is a low voltage power distribution assembly designed for data centers and mission critical facilities. It's UL listed, fully customizable, and built to handle high-density electrical loads. PowerStream manufactures them to your exact specifications with a six-week lead time.

Engineer-to-order means we don't build from a catalog. We design and manufacture each unit based on your project requirements. You provide specs, we engineer the solution, and we build it. That's why our lead times are faster than off-the-shelf alternatives.

Standard lead time starts at six weeks from order to factory test completion. We also offer expedited timelines for projects with tighter schedules. Quote requests are answered within 24 to 48 hours.

PowerStream is UL listed, ISO 9001:2015 certified, Seismic Certification (CBC 2025 & IBC 2024) and EcoXpert Power Master Distribution certified. Every unit is factory tested before shipment to ensure it meets code and performs as specified.

Yes. We ship across the United States and Canada to data centers, EPCs, general contractors, developers, distributors, and OEM representatives. Our products are built in Texas and tested before they leave the facility, regardless of destination.

Every unit is engineer-to-order. We design and build to your exact specifications, whether that's bus bar configuration, voltage rating, or integration with existing systems.

Standard ETO lead time is six weeks from order to factory test completion. We can accelerate for mission critical projects. Quote turnaround is 24 to 48 hours.

Yes. All UL 891 switchboards are UL listed. We hold ISO 9001:2015 certification and are EcoXpert Power Master Distribution certified.

We do. Contact our engineering team with your timeline and requirements. We've delivered critical systems in under four weeks when needed.

99% on-time delivery. We build to schedule and test every unit before it ships. Factory-tested means fewer surprises on site.

PowerStream manufactures UL 891 switchboards from 400A to 5000A with MTZ and R-frame configurations. Standard and high-density footprints accommodate both compact installations and applications requiring maximum bus capacity. NEMA 3R enclosures are available for outdoor or harsh environments.

Standard engineer-to-order lead time starts at six weeks from order to factory test completion. This timeline accounts for application-driven engineering, in-house copper fabrication, and full factory testing before shipment. We lock in each job’s production schedule and place orders with our suppliers for any necessary components the day the purchase order is received. Expedited schedules are evaluated on a project-by-project basis.

Yes. All UL 891 switchboards are UL listed and manufactured to meet UL 891 standards. PowerStream maintains ISO 9001:2015 certification, Seismic,  and EcoXpert Power Master Distribution certification. Every unit is factory tested before leaving our facility.

Custom configurations are standard practice at PowerStream. Our engineering team designs each switchboard around your specific application, voltage, amperage, and environmental requirements. In-house copper fabrication gives us flexibility that larger manufacturers cannot match.

PowerStream combines vertically integrated manufacturing, application-driven engineering, and disciplined production planning to deliver speed, quality, and flexibility that traditional manufacturers often struggle to match. Our hub-and-spoke manufacturing model allows production capacity to scale in weeks rather than years, while our in-house fabrication, powder coating, assembly, and testing capabilities provide greater control over quality, lead times, and design changes. We don't force customers into catalog limitations, we build solutions around their application and execute with predictable, on-time delivery.

Quotes, bills of materials, and drawing packages are returned in 24 to 48 hours. A senior engineer reviews every request, so the drawings you receive are accurate and ready for your submittal process.

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Yes. Like every PowerStream product, units are factory tested with documented results before shipment.

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Send your specs through the Request a Quote form. A senior engineer reviews every request and responds within 24 to 48 hours with a quote and accurate drawings.

A UPS maintenance bypass switchboard allows critical loads to remain energized while the UPS is isolated for inspection, maintenance, repair, replacement, or testing. Properly designed bypass systems enable maintenance activities without disrupting power to downstream equipment.

PowerPass Slim is optimized for the smallest possible footprint and requires side or rear access for installation.
PowerPass Core provides the same functionality as Slim while allowing front-access-only installation.
PowerPass Pro adds 4-pole switching, advanced metering, expanded control functionality, and optional drawout breakers for applications requiring enhanced operational flexibility.
PowerPass Tile is a modular platform that supports maintenance bypass, input, output, paralleling, load bank, and distribution applications within a common architecture.

Choose Slim when footprint is the primary concern.
Choose Core when front-only access is required.
Choose Pro when 4-pole switching, advanced diagnostics, or drawout breakers are desired.
Choose Tile when modularity, scalability, load bank integration, or multi-UPS configurations are required.
Our engineering team can help determine the best architecture based on your UPS configuration, space constraints, and operational requirements.

Yes. PowerPass Tile can support both single-UPS and multi-UPS architectures, including paralleling systems for N+1, distributed redundant, and capacity expansion applications.

Yes. PowerPass Tile can be configured with factory-integrated load bank breakers and Scheme 29 interlocking systems to simplify commissioning, testing, preventative maintenance, and operational procedures.

Yes. PowerPass Pro is available with 4-pole MasterPact MTZ circuit breakers that provide complete UPS isolation, including neutral disconnection on 4-wire systems.

Yes. PowerPass Pro and Tile configurations are available with drawout MasterPact MTZ breakers to simplify maintenance and replacement activities without disturbing power or control cabling.

Yes. Depending on the application, PowerPass Tile can be configured with load-side lugs, distribution breakers, load bank breakers, or a combination of all three. PowerPass Slim, Core, Pro can be cabled to downstream switchboards with distribution breakers.

PowerPass systems can be equipped with a variety of power monitoring, energy metering, and communication solutions, including power quality metering, Modbus communications, and integration into building management and data center infrastructure management systems.

Yes. All PowerPass solutions are manufactured utilizing UL891 switchboard construction and are factory tested prior to shipment.

PowerPass solutions are manufacturer agnostic and can be designed to support virtually any UPS system, including single-module, parallel, and redundant architectures.

Absolutely.

While Slim, Core, Pro, and Tile cover the majority of UPS bypass applications, every facility has unique requirements. PowerStream's engineering team can develop a custom solution tailored to your electrical distribution, operational, maintenance, and space constraints.
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Whenever possible, we leverage proven elements from our standardized PowerPass architectures to accelerate engineering, simplify manufacturing, reduce risk, and maintain a familiar user experience. The result is a solution customized to your application without starting from scratch.

Lead times vary by configuration and project complexity. Standardized PowerPass architectures are specifically designed to accelerate engineering and manufacturing compared to traditional custom switchgear projects.

Contact PowerStream for current lead times and project-specific scheduling.

Yes. Our team routinely works with consulting engineers, contractors, data center operators, and end users to develop bypass architectures, one-line diagrams, interlocking schemes, load bank strategies, and maintenance procedures tailored to project requirements.

Generator Combiner Boards are modular systems designed for temporary power deployment, generator connection, and generator combining applications. Generator Switchboards utilize UL891 switchboard construction and are typically selected when additional protection, distribution, metering, or operational flexibility is required.

Both. Systems can be configured for a single generator connection point or multiple generators feeding a common load. Modular Generator Combiner Boards can be expanded as power requirements evolve.

Each combiner board is built using standardized modules that can be added, removed, or reconfigured in the field or factory. This allows capacity to grow alongside project requirements without replacing the entire system.

Yes. The modular architecture allows additional generator inputs and capacity to be incorporated as operational requirements change, making the platform ideal for temporary power fleets and evolving facilities.

Yes. Both Generator Combiner Boards and Generator Switchboards can be configured with color-coded camlock connections to simplify temporary generator deployment and field installation.

Yes. Depending on the application, systems can be configured with camlock connections, hardwired lug landings, distribution breakers, or hybrid configurations that combine multiple connection methods within the same lineup.

Yes. NEMA 3R configurations are available for outdoor applications and harsh environmental conditions.

Absolutely. While our Generator Combiner Boards and Generator Switchboards address most temporary power and generator connection applications, every project is unique. PowerStream can engineer custom solutions tailored to your operational, electrical, and space requirements. Whenever possible, we leverage proven elements from our modular combiner and switchboard platforms to accelerate engineering, simplify manufacturing, and reduce project risk.

PowerStream was built around reducing project risk. We combine application-driven engineering, vertically integrated manufacturing, extensive factory testing, and transparent project execution to help customers avoid delays, surprises, and startup issues.

We maintain dedicated production capacity, procure critical materials ahead of demand, and utilize a scalable manufacturing model designed to support changing customer requirements. This enables starting engineer-to-order lead times as low as six weeks for many applications.

Yes. We understand projects evolve. Because engineering, fabrication, assembly, and testing are managed in-house, many design changes remain feasible later into the project lifecycle than with traditional manufacturing models.

Every project is managed through PowerStream's end-to-end ERP platform, which tracks activity from initial quotation through final invoicing. Customers receive access to a dedicated project portal providing real-time visibility into engineering, procurement, manufacturing, testing, documentation, and shipping milestones throughout the project lifecycle.

All equipment undergoes factory testing prior to shipment. Depending on the application, this may include UL891 testing, primary injection testing of ground fault systems, functional verification, metering validation, interlock testing, and commissioning-level testing procedures with documented results.

We believe transparency is critical to project success. We communicate risks early, provide realistic commitments, and keep customers informed throughout the project lifecycle. Our goal is to eliminate surprises and help customers make informed decisions—not simply tell customers what they want to hear.

No. While we leverage proven product architectures whenever possible, every project begins with the application. Our engineering team routinely develops custom solutions tailored to specific operational, maintenance, environmental, and space requirements. We focus on the products and applications where we can provide exceptional expertise and execution, ensuring customers receive solutions backed by real-world experience.

The question is rarely about the equipment itself. It's about execution.

Customers typically engage PowerStream when they need a partner that can respond quickly, adapt to changing project requirements, provide greater visibility throughout manufacturing, and deliver application-driven solutions without the bureaucracy often associated with larger organizations.

We combine industry-leading components with responsive engineering, transparent communication, and a manufacturing model designed around the realities of modern construction projects.