Leviton Telcom 460MF12W Fused Mechanical Interlock Enclosure

Product Description

The LEVITON TELCOM 460MF12W is a fused mechanical interlock enclosure designed for 3-pole, 4-wire electrical configurations. It provides a safe, controlled switching arrangement that physically prevents two sources from being connected simultaneously, reducing the risk of backfeed and equipment damage. This type of enclosure is a core component in transfer switching applications and is typically installed by licensed electricians working on commercial or industrial power distribution systems. The mechanical interlock mechanism ensures only one power path is active at a time, which is critical for generator transfer and similar dual-source setups.

This enclosure suits applications where a fused disconnect with mechanical interlock logic is required in a 3-pole, 4-wire system. Common use cases include generator interconnect panels, manual transfer switch assemblies, and main-to-branch interlocked feeder applications. It is sold as a single unit and is suited for installations where code-compliant physical interlock between two switching positions is required by the authority having jurisdiction.

Key Features

• Fused design integrates overcurrent protection directly into the interlock enclosure
• Mechanical interlock prevents simultaneous engagement of both switching positions
• 3-pole, 4-wire configuration supports three-phase or split-phase systems with neutral
• Sold as a single enclosure assembly, ready for panel integration
• Hardware accessory classification suitable for trade installation in distribution assemblies

Compatibility

Designed as an OEM-style replacement or direct-install component for fused mechanical interlock enclosure applications in 3-pole, 4-wire electrical distribution systems.

Installation Notes

Installation should be performed by a licensed electrician in accordance with the National Electrical Code (NEC) and any applicable local codes. De-energize all circuits and verify zero voltage at all terminals before beginning work. Confirm the enclosure ratings are appropriate for the system voltage and ampacity before mounting. Do not bypass or defeat the mechanical interlock mechanism under any circumstances.