Leviton Telcom 430MI7WLEVS 30A Mechanical Interlock

Product Description

The LEVITON TELCOM 430MI7WLEVS is a 30-amp mechanical interlock designed to prevent two circuits or switching devices from being energized simultaneously. Mechanical interlocks are a critical safety component in electrical panels and transfer switch assemblies, ensuring that incompatible circuit states — such as utility and generator feeds — cannot be active at the same time. This interlock is a hardware accessory sold as an individual unit and is installed by licensed electricians working on residential or light commercial electrical systems.

This mechanical interlock is suited for applications where physical prevention of simultaneous breaker engagement is required. Typical use cases include generator transfer interlock kits installed on load-center panels, where the interlock slides onto two adjacent or tandem breakers to enforce a mutually exclusive switching state. It is appropriate for new installations and replacement service work on existing panels.

Key Features

• 30-amp rated mechanical interlock for dual-circuit exclusivity
• Physical interlock mechanism prevents simultaneous energization of two breakers
• Sold as a single unit — no additional quantity pack required
• Hardware accessory category fitment for panel and transfer switch applications

Compatibility

Designed as an OEM-style replacement mechanical interlock for compatible electrical load-center panels requiring a 30-amp rated interlock accessory. Verify panel model compatibility before installation.

Installation Notes

Installation must be performed by a qualified, licensed electrician in accordance with the National Electrical Code (NEC). De-energize the panel at the utility disconnect and verify zero voltage with a meter before handling any breakers or installing the interlock. Do not modify the interlock mechanism or force the slide if resistance is encountered, as improper fit may indicate an incompatible panel model.