AST3123R

Overview

The Hoffman AST3123R is a Type 1 splitter trough enclosure designed for indoor use. It features a 36-inch section constructed from painted steel with an ANSI 61 gray polyester powder paint finish. The unit supports a 3-wire configuration with a main lug rated at 125 A and six branch lugs rated at 110 A. Dimensions are 36 inches in length, 6 inches in width, and 4.5 to 5 inches in height depending on the specific variant documentation. It includes pre-installed terminal blocks and a single-point ground lug.

Feature Summary

• Splits feeder circuit conductors into multiple branch circuit conductors
• Includes pre-installed terminal blocks for three- and four-wire configurations
• Features hinged covers with standard hinges and mounting holes in the back
• Constructed from painted steel with corrosion-resistant finish

Applications

• Splitting feeder circuits into branch circuits in industrial settings
• Indoor electrical distribution systems requiring Type 1 protection
• Panelboard feeders where conductor splitting is necessary

Procurement Notes

Verify the exact dimensional specifications (height) against the specific manufacturing batch or distributor listing, as sources indicate variations between 4.5 and 5 inches. Confirm the wire configuration (3-wire vs. 4-wire) matches the project requirements. Ensure the environment is indoor only due to the Type 1 rating. Check for availability of the Ground Splitter accessory if additional grounding points are needed.

Selection Notes

Select this model when a 36-inch splitter trough is required for indoor applications. The 125 A main lug rating must accommodate the incoming feeder current. Verify that the branch circuit loads do not exceed the 110 A rating per lug. Consider the need for additional knockouts or accessories like the ground splitter bar based on the specific wiring diagram.

Part Context

The AST series by Hoffman Enclosures, now part of nVent, provides standardized splitter troughs for electrical distribution. These units are designed to efficiently manage conductor routing in panelboards. The AST3123R specifically addresses the need for splitting feeders in compact indoor enclosures, offering a robust steel construction suitable for general industrial environments.

Replacement Considerations

No public confirmed substitute part numbers are available in the provided data. Consult manufacturer catalogs for equivalent models within the AST series or alternative brands offering similar Type 1 splitter troughs with matching dimensions and amperage ratings.