NEMA 3R Switchboard
-- Steady & Reliable Manufacturer --
Product Overview
NEMA 3R Switchboards are specialized low-voltage distribution panels designed for the North American and international markets requiring robust outdoor protection. At DSJ Electrical, our NEMA 3R units are engineered to provide superior defense against rain, sleet, snow, and external ice formation. Featuring a "sloped-roof" design and specialized gaskets, these panels are the industry standard for outdoor construction sites, rooftop HVAC feeds, and irrigation systems. We use heavy-gauge galvanized steel or aluminum with a baked polyester powder coating to ensure that the enclosure does not rust even when exposed to the elements 24/7. Inside, our switchboards can be configured with main breakers up to 6000A and a variety of distribution branches, providing a safe and durable outdoor power hub for any commercial or industrial application.
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Temporary Site Power Board
Temporary Site Power Board – Three Phase, IP44 Enclosure, Type A RCDs & RCBOs, Hi-Visibility X15 Orange
Electrical Partner
At DSJ, we transform complexity into reliability. With 42+ years of expertise in power distribution systems, our turnkey service integrates every phase – from regulatory compliance to final commissioning – ensuring seamless project execution for global clients. Whether it is the initial design or the final handover, we will strictly control every detail to ensure that the final delivered products perfectly meet your expectations. With us, you can focus on your core business with peace of mind, knowing that your project is in the hands of professional and reliable partners.
Introduction
The NEMA 3R Switchboard line from DSJ Electrical Co., Ltd is built for "Climate Endurance." We recognize that for projects following North American standards, the enclosure is just as important as the electrical components inside. Our introduction of this series focuses on "Moisture Shedding" and "Corrosion Protection." Every seam is precision-welded and every door is equipped with a high-durability drip shield.
Innovation at DSJ involves "Ventilated Sealing." We utilize louvered vents that allow for airflow to cool the busbars while preventing driving rain from entering the energized zones. We prioritize "Operator Access," with pad-lockable "Handle-and-Linkage" systems that allow for easy operation even while wearing heavy safety gloves. At DSJ, we provide these switchboards with integrated "Service Entrance" ratings, making them the perfect first-point-of-contact for utility power in outdoor settings. Choosing our NEMA 3R gear means choosing a product that meets strict international standards for outdoor safety and durability. We provide the "Hardened Shell" that keeps your power flowing, regardless of the forecast.
Applications
- Rooftop Solar: Main AC combiner and distribution for roof-mounted arrays.
- Construction Sites: Durable, temporary outdoor power distribution.
- Water Pumps: Protecting motor starters for outdoor irrigation and wells.
- Charging Stations: Main power hub for outdoor EV charging plazas.
- Commercial HVAC: Powering large chillers and air handlers on building roofs.
- Mining Facilities: Outdoor distribution in remote, dusty environments.
Specifications
| Technical Category | NEMA 3R Detail |
|---|---|
| Voltage Rating | Up to 600V AC |
| Current Rating | 400A to 6000A |
| Protection Rating | NEMA 3R (Outdoor, Rainproof) |
| Material | G90 Galvanized Steel / Stainless Steel / Aluminum |
| Finish | ANSI 61 Gray Polyester Powder Coat |
| Phase Design | 3-Phase 3-Wire / 3-Phase 4-Wire |
| Standard | UL 891 / NEMA PB2 |
Why Choose Us
DSJ Electrical provides "Military-Grade" enclosure technology. We understand the nuances of NEMA standards, ensuring that our switchboards aren't just "labeled" 3R, but are engineered with the drip-shields, gaskets, and ventilation logic that true outdoor reliability requires.
- Q: Can NEMA 3R be used in a car wash?
- A: No, NEMA 3R is for rain/snow. For direct hose-down, you need NEMA 4 or 4X.
- Q: Is there an internal heater?
- A: We can include an anti-condensation heater as an option to prevent moisture buildup.
Advantages
- Weather-Resistant: Proven protection against rain, snow, and ice.
- Corrosion Protection: Multi-stage coating process prevents rust.
- Easy Installation: Bottom-entry or side-entry conduit plates included.
- Vandal Resistant: Reinforced doors and internal hinges for security.
- Customizable: Can include metering, surge protection, and circuit breakers.
- Standard Compliance: Built to meet North American utility requirements.
Standards & Certifications
Our switchboards are compliant with UL 891 and NEMA PB2. We hold CE and ISO 9001 certifications. Each enclosure is "Rain Tested" according to NEMA 250 standards to ensure zero water ingress during heavy downpours.
Payment & Shipping
Units are shipped as fully assembled vertical sections on heavy-duty wooden skids with plastic shrink-wrap protection. Lead times: 5-8 weeks.
DSJ Story
about DSJ
Building Power, Building Trust
Founded in 1983, DSJ is a leader in China's power distribution equipment. Headquartered in Beijing as the top-selling enterprise, we integrate manufacturing with trade and maintain full in-house capabilities in R&D, production, and sales. This enables efficient fulfillment of custom orders with industry-leading speed.
As a producer of distribution system, transformer, generator and photovoltaic products exceeding Chinese/international standards, DSJ supplies medium/low-voltage electrical equipment, and PV systems. For over four decades, we have delivered high-safety electrical solutions globally to public infrastructure, corporations, and households – achieving the industry's lowest return rate.
Committed to "meeting diverse needs through quality", DSJ leverages expert teams to provide one-stop services: pre-sales consultation & customization, flexible logistics/payment options, and reliable maintenance – ensuring seamless producer-maintainer-customer collaboration.
+86 18513032986 
FLC Center, Chaoyang District, Beijing, China