Leviton Telcom 530MI9WLEV 30 Amp Mechanical Interlock

Product Description

The LEVITON TELCOM 530MI9WLEV is a 30-amp mechanical interlock designed to prevent simultaneous engagement of two circuits or switching positions. Mechanical interlocks provide a physical barrier that blocks one switch or breaker from closing while another is already in the closed position, a critical safety function in transfer switch applications, generator hookups, and dual-feed panel configurations. Licensed electricians typically specify and install this device wherever code or system design requires a positive, non-electrical means of preventing back-feed or cross-connection between two power sources.

This interlock is suited for commercial and residential electrical installations where a hard mechanical constraint is required between two adjacent switching devices rated at 30 amps. Common applications include manual transfer switch assemblies, dual-source panelboard configurations, and generator interlock kits installed on service entrance equipment. The device is sold as a single unit per package.

Key Features

• 30-amp rated mechanical interlock for positive circuit exclusion
• Physical interlock mechanism requires no external power or control wiring to operate
• Single-unit packaging suitable for individual installation projects
• Designed for use in transfer switch and dual-feed switching applications

Compatibility

Designed as an OEM-style mechanical interlock for 30-amp switching device assemblies. Verify fitment against the specific panelboard or transfer switch model before installation, as interlock geometry varies by manufacturer and device series.

Installation Notes

Installation of mechanical interlocks on service entrance equipment or transfer switch assemblies must be performed by a licensed electrician in accordance with the National Electrical Code (NEC). De-energize and lock out all affected circuits before beginning any work on the panel or switching devices. Confirm that the interlock bracket aligns correctly with both switching positions before securing hardware. Do not modify the interlock mechanism or force operation, as physical damage will compromise the safety function.