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Leviton 420MI12W Non Fused Mechanical Interlock Enclosure 20A, 125V/250V

SKU: 420MI12W Leviton

Special Order: typically 2–6 weeks

Ships directly from the manufacturer. This is an estimated lead time, not a guaranteed delivery date.

Availability can change and lead times may be longer. If your project has a deadline, check with us before ordering.

A member of our team will check with the manufacturer and personally reply by email.

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Key Features

  • Provides safe power sequencing and prevents accidental energization with a mechanical interlock for critical security and surveillance installations
  • IP67 watertight housing shields connections from water and dust for reliable outdoor and harsh-environment performance
  • Supports 20A, 125/250V single-phase loads (3P/4W) to power generators, UPS or distribution equipment without compromise
  • North American pin & sleeve design and IEC 309 compliance deliver broad compatibility and dependable mating with industry-standard hubs
  • Non-fused configuration allows integration with site-specific overcurrent protection schemes; high-visibility orange color simplifies identification

Quick Specifications

Product Model
420MI12W
Brand Name
Leviton
Product Name
IEC Pin & Sleeve Mechanical Interlock
Product Type
Mechanical Interlock
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Product information

420MI12W

Overview

Ensure reliable, safe power control for critical installations with the Leviton 420MI12W IEC pin & sleeve mechanical interlock enclosure. Designed for security, surveillance and monitoring deployments, this enclosure provides positive mechanical isolation to prevent accidental energization during maintenance or power transitions. Built to withstand outdoor use, the IP67 watertight rating protects connections from water and dust, helping minimize downtime in harsh environments.

The 420MI12W handles 20A at 125/250V in a 3-pole, 4-wire configuration and meets IEC 309-1/309-2 standards for consistent compatibility with industry equipment. Its North American pin & sleeve form factor ensures reliable mating with standard hubs (sold separately), while the non-fused design lets you apply site-specific overcurrent protection to meet electrical policies. High-visibility orange housing aids quick identification on job sites and in equipment rooms.

Ideal for portable generator hookups, camera power distribution, temporary site power, and data center maintenance, the Leviton 420MI12W helps protect personnel and assets. Specify it for your next security or surveillance power application — contact us to order or for integration guidance.

Features

  • Provides safe power sequencing and prevents accidental energization with a mechanical interlock for critical security and surveillance installations
  • IP67 watertight housing shields connections from water and dust for reliable outdoor and harsh-environment performance
  • Supports 20A, 125/250V single-phase loads (3P/4W) to power generators, UPS or distribution equipment without compromise
  • North American pin & sleeve design and IEC 309 compliance deliver broad compatibility and dependable mating with industry-standard hubs
  • Non-fused configuration allows integration with site-specific overcurrent protection schemes; high-visibility orange color simplifies identification
6 of 6 specifications
Technical specifications for Leviton 420MI12W Non Fused Mechanical Interlock Enclosure 20A, 125V/250V
General Information
Brand Name Leviton
Product Name IEC Pin & Sleeve Mechanical Interlock
Product Type Mechanical Interlock
Manufacturer Part Number 420MI12W
Physical Characteristics
Color Orange
Warranty
Limited Warranty 2-Year

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SKU:
420MI12W
Manufacturer part:
420MI12W
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Availability is shown above. Special-order items and project quantities may need additional lead time. Contact us to confirm a delivery date before scheduling installation.

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What should I know about returns?

Returns require an approved RMA. Consult the linked return policy for deadlines and eligibility. For standard non-defective returns, eligible factory-sealed items carry a 15% restocking fee and customer-paid return shipping; open-box and used items are refused. Defective and DOA claims follow the policy's separate terms. Special orders and other exclusions are final sale.

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Leviton 420MI12W Non Fused Mechanical Interlock Enclosure 20A, 125V/250V

420MI12W

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