Monoprice
Monoprice 135066 12ft Heavy Duty Locking Extension Cord 20A
★★★★★
Power Up with Heavy-Duty ReliabilityThe Monoprice Heavy Duty Extension Cord is designed to provide a secure and reliable power connection for your high-demand devices. Featuring locking connectors and a durable construction, this extension cord is ideal for industrial and commercial applications....
$54.00*
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*Price sourced from Amazon.com. Last updated:Jul 15, 2026.Price and availability are subject to change.
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Overview
Power Up with Heavy-Duty Reliability
The Monoprice Heavy Duty Extension Cord is designed to provide a secure and reliable power connection for your high-demand devices. Featuring locking connectors and a durable construction, this extension cord is ideal for industrial and commercial applications.
- Connectors: NEMA L5-20P to NEMA L5-20R
- Length: 12 Feet
- Gauge: 12AWG
- Amperage: 20A
- Voltage: 125V
- Type: SJT
Key Features
NEMA L5-20P to NEMA L5-20R
This Monoprice heavy-duty extension cord connects your computer or other device with a NEMA 5-20P plug to a NEMA L5-20R outlet.
Buy with Confidence: With Monoprice's Lifetime Warranty on all Cables, you can rest assured we stand behind our products and our customers
Quality at a Fair Price: Monoprice's rugged design and rigid quality control standards deliver high quality products at fair prices.
Service & Support : You're never on your own with Monoprice products! We have a full team of friendly and knowledgeable technicians available to answer your questions
Specifications
Length
12 feet
Amperage
20A
Connector Type (Male)
NEMA L5-20P
Connector Type (Female)
NEMA L5-20R
Warranty
Lifetime Warranty on all Cables
Pros & Cons
👍 Pros
- Features NEMA L5-20P to NEMA L5-20R connectors for secure, locking power connections
- Designed as a heavy-duty cable, providing enhanced durability and reliability for demanding applications
- Offers a generous 12-foot length, which extends reach for various equipment setups
- Backed by Monoprice's Lifetime Warranty on all cables, assuring long-term confidence in its quality
- Constructed with rugged design and rigid quality control standards, ensuring high-quality performance
👎 Cons
- The specific NEMA L5-20P to NEMA L5-20R configuration may limit its use to only compatible outlets and devices
- Its heavy-duty construction, while beneficial for durability, might make the cable less flexible or harder to route in tight spaces
- The 12-foot length, while useful for reach, could be excessive for close connections, potentially creating cable clutter
Frequently Asked Questions
What type of outlets and devices is this Monoprice extension cord designed for?
This Monoprice heavy-duty extension cord connects devices with a NEMA 5-20P plug to a NEMA L5-20R outlet, designed for specific power configurations.
How long is the Monoprice heavy-duty locking extension cord?
The Monoprice 135066 extension cord has a length of 12 feet, providing ample reach for connecting devices.
What is the amperage rating for this Monoprice extension cord?
This Monoprice 12ft heavy-duty extension cord is rated for 20A, suitable for demanding power requirements.
Does Monoprice offer a warranty for this extension cord?
Yes, Monoprice stands behind its products with a Lifetime Warranty on all cables, including this heavy-duty extension cord.
Is this extension cord considered heavy-duty?
Yes, this Monoprice extension cord is specifically described as heavy-duty, designed for durability and reliable performance.
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