250A Power Panelboard, 3PH Main Lug Only Panel, 42 Circuit, 480Y/277, (15) Breakers, NEMA 3R, Wall Mount

Product Overview

250A Power Panelboard, 3PH Main Lug Only Panel, 42 Circuit, 480Y/277, (15) Breakers, NEMA 3R, Wall Mount is a product intended for professional commercial and industrial applications.

Key Specifications

• Panelboard: The MPD-PB-RC-ML-YE-F-F-42-TF-N3R-1.T23-1.T19-1.T17-12.S10-M1 power distribution unit gives operators the ability to power their 480Y/277 volt equipment from a single system. On the primary side, operators connect three-phase 480Y/277 volt line-in power using a customer-provided cord. This panelboard distributes power from an electrical feed to various branch circuits. Models with breakers offer circuit protection. All branch breakers are compatible with Larson Electronics 150AF size branch breakers.
• Main Breaker Panel vs Main Lug Only Panel: Panelboards are available with a main circuit breaker or as main lug only (MLO). A main circuit breaker provides overcurrent protection and serves as the primary unit serving all branch circuits and controls within the panel. This type of panel offers a single disconnection method for connected loads. A MLO panel typically serves as an add-on or sub panel, which is connected to a main breaker panel. A MLO panel does not have overcurrent protection or devices.
• Operation: • Voltage: 3-Phase 480Y/277 AC 3PH
• Protective Construction: The power distribution system is protected by steel construction. Equipped with hinged locking doors, the main lug only panelboard carries a NEMA 3R rating for use in indoor or outdoor locations and protection from water, debris, corrosion, and external ice formation. This unit is compatible with wall mounting installations.
• Certification: All units are built in accordance to NFPA 70 (National Electric Code), NEMA PB1 and NRTL certified to UL 1640. NEMA 4 and NEMA 4X equipment can be equipped upon request.
• Grounding: The panel is grounded to the frame and we provide a grounding lug on the frame for the earth ground.
• Applications: This power distribution system is ideal for indoor or outdoor use and applications including but not limited to, construction sites, plant maintenance, plant turnarounds, shows, exhibits, and shipyard operations. These power distribution systems are popularly used in applications where external power sources are often necessary. We also offer class rated transformers for use within explosion proof and hazardous location environments.
• Custom Built Systems Available: Larson Electronics is a manufacturer and we can build portable power distribution systems to your specifications. Although we carry several models of portable power distribution systems in stock, we can deliver custom ordered units almost as quickly as our prebuilt units. If this model does not meet your needs, please contact us at 1-800-369-6671 or

This item is grouped with Power Distribution Panels with KVA Transformers.

Before ordering: Verify ratings, dimensions, compatibility, and installation requirements before ordering.