Cooper Wiring Devices L530R Se...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$57.07
Cooper Wiring Devices L530R Severe-Duty Locking Plug, 30A Industrial Grade

Cooper Wiring Devices L530R Severe-Duty Locking Plug, 30A Industrial Grade

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Model: L530-R

In Stock (leaves warehouse same day if ordered before 3pm ET)

$57.07
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Cooper Wiring Devices L530R Severe-Duty Locking Plug, 30A Industrial Grade

The Cooper Wiring Devices L530R Severe-Duty Locking Plug is a heavy-duty industrial plug family built from glass-filled nylon and rated 30A for demanding electrical environments. This locking plug series is available in 2-pole and 3-pole configurations, with voltage options of 125 volts and 125/250 volts depending on the pole/voltage combination selected, giving electricians and facility teams flexibility across a range of industrial branch-circuit applications. Every plug in this family is a single-configuration device with back wiring for a clean, secure termination, and accepts an allowable wire size of #18-10 AWG. Its black housing and rugged glass-filled nylon construction are engineered to withstand the physical and environmental stress typical of industrial plants, manufacturing floors, and heavy commercial facilities where standard-duty devices fall short. This locking plug series is intended for professional electricians and facility maintenance teams who need a dependable connection point for portable equipment, power tools, and machinery on 30A branch circuits.

Key Features

  • Amperage Rating: Rated 30A across the family for reliable, continuous performance in industrial-duty circuits.
  • Pole/Voltage Options: Available in 2-pole and 3-pole configurations at 125 volts or 125/250 volts, allowing the right device to be matched to the circuit.
  • Durable Construction: Molded from glass-filled nylon for added mechanical strength, dimensional stability, and resistance to impact and abrasion in demanding environments.
  • Back Wiring Method: Back-wired terminals allow for a secure, space-efficient connection during installation, reducing the risk of loose terminations.
  • Wire Compatibility: Accepts #18-10 AWG conductors, supporting a broad range of industrial wiring needs and circuit configurations.
  • Industrial-Grade Application: Purpose-built for industrial use where durability, vibration resistance, and dependable electrical connections are essential to daily operations.
  • Single Design Type: Single-configuration locking plug for straightforward, dedicated circuit connections without cross-compatibility confusion.
  • Color: Black finish for a clean, professional appearance that resists visible wear in industrial settings.
  • Severe-Duty Rated: Engineered to hold up under the frequent connect/disconnect cycles common on job sites and production floors.

Technical Specifications

  • Amperage Rating: 30A
  • Material: Glass-filled nylon
  • Wiring Method: Back
  • Allowable Wire Size: #18-10 AWG
  • Application: Industrial
  • Color: Black
  • Design Type: Single
  • Number of Poles Available: 2, 3
  • Voltage: 125 volts, 125/250 volts

Typical Applications

  • Industrial Electrical Installations
  • Manufacturing and Plant Floor Equipment Connections
  • Heavy Commercial Power Distribution
  • Severe-Duty and High-Demand Circuit Applications
  • Portable Tool and Machinery Power Connections
  • Renovation and New Industrial Construction

Why Cooper Wiring Devices?

Cooper Wiring Devices builds this severe-duty L530R locking plug series from glass-filled nylon to deliver the mechanical strength and durability that industrial environments demand day after day. With a 30A rating across 2-pole and 3-pole, 125-volt and 125/250-volt configurations, back-wired terminals, and compatibility with #18-10 AWG conductors, it provides electricians and facility teams with a dependable, code-conscious solution for demanding industrial power connections. The rugged single-configuration design and black industrial finish make it a practical choice for facilities that require consistent, long-lasting performance from every device on the line.

Manufacturer Resources

Product Specs

Wiring Method:
Back
Allowable Wire Size:
#18-10 AWG
Application:
Industrial
Amperage Rating:
30A
Design Type:
Single
Product Type:
Locking Plug
Connection Type:
Back Wired
Product Material:
Glass-Filled Nylon
Product Color:
Black
Department:
Electrical
Product Group:
Wiring Devices
Configuration:
Single
Product Subgroup:
Plugs & Connectors

Cooper Wiring Devices L530-R – Frequently Asked Questions

1) What is the difference between the L530-R and L1430-R versions of this Cooper locking plug?
Two orderable configurations, both rated 30A. The L530-R is the 2-pole device at 125 volts, for a straight 120V 30A locking circuit. The L1430-R is the 3-pole device at 125/250 volts, used where you need both legs plus neutral, typical of a 4-wire 120/240V equipment feed. Pick by what the receptacle on the wall or the cord cap you are matching already is, since each is a single-configuration plug and the blade patterns do not interchange.
2) What wire size can I land in this 30A Cooper locking plug?
Terminals take #18 through #10 AWG, which covers the 10 AWG copper you would normally pull for a 30A branch circuit as well as smaller cord conductors on portable equipment. It is back wired, so conductors come in from the rear of the body rather than wrapping side screws.
3) I need a 30A locking plug for a 480V three-phase machine. Will the Cooper severe-duty 30A plug work?
No. The Cooper severe-duty 30A locking plug family is offered only at 125 volts and 125/250 volts, which covers single-phase branch circuits. For a 30A 480-volt three-phase connection, the Leviton industrial grade polarized NEMA L16-30P plug is the configuration to specify. For 480V three-wire rather than three-phase four-wire, the Pass & Seymour L720P Turnlok NEMA L8 plug is a 3-wire 480V device.
4) Is the Eaton L6-30 locking plug a drop-in replacement for the Cooper L1430-R?
No. The Cooper L1430-R is the 3-pole, 125/250-volt member of the severe-duty 30A family, which is a four-wire configuration. The Eaton L6-30 plug is a two-pole three-wire device. The blade patterns differ, so it will not mate with an L14-30 receptacle even though both are 30A locking plugs.
5) Is this Cooper L530R plug tough enough for a plant floor where cords get dragged and stepped on?
The body is glass-filled nylon rather than plain thermoplastic, which is what gives it impact and abrasion resistance and dimensional stability under repeated connect/disconnect cycles. Cooper classes the family as industrial application, black housing. For wet or washdown areas you would want a dust-tight or watertight style instead, such as the Pass & Seymour 267 Series rubber dust-tight locking plug.
6) Can I use this on a 20A circuit instead of a 30A one?
The plug is rated 30A, and a locking plug must match the receptacle configuration it mates with, so it will not engage a 20A locking receptacle. For 20A locking work the comparable options are the Eaton Safety Grip 20A 120/208V plug, the Leviton L6-20P 250V plug, or the Leviton 4-wire 125/250V 3-phase 20A plug.
7) Is a locking plug the right choice for portable tools and machinery, or should I use a straight-blade plug?
Locking is the right call where the cord gets pulled or the equipment vibrates: the blades twist into the receptacle and cannot be shaken loose. That is the intended use for the Cooper L530R family, portable equipment, power tools and machinery on 30A branch circuits in plants and heavy commercial facilities. Straight-blade makes more sense only for general-purpose convenience outlets where accidental disconnection is not a safety or production issue.
8) My cord cap only needs 15A or 20A, not 30A. What locking plugs cover those ratings instead of the Cooper L530-R?
The Cooper severe-duty locking plug family is rated 30A throughout, so a lighter branch circuit is better matched elsewhere. At 15A 125V there is the Bryant 4722N angle locking plug, NEMA L5-15P. At 15A 250V, the Leviton 4570-C industrial grade 2-pole plug, NEMA L6-15P. At 20A 250V, the Leviton industrial grade NEMA L6-20P, and for 20A 125/250V three-phase the Leviton 4-wire industrial grade plug.
9) For a washdown or dust-heavy area, is the glass-filled nylon Cooper 30A locking plug the right choice or is there a sealed option?
The Cooper severe-duty 30A plug is molded from glass-filled nylon for impact and abrasion resistance in industrial plants, but it is not described as a sealed device. Where contaminant ingress at the cord cap is the concern, the Pass & Seymour 2675-2675 of the 267 Series is a 20A rubber dust-tight locking plug, and the Bryant 71020NP is a 7 Series non-metallic locking plug. Note the Pass & Seymour device is 20A, so it does not substitute on a 30A circuit.
10) How does the Cooper severe-duty 30A locking plug compare to armored or specification-grade industrial plugs?
The Cooper severe-duty 30A plug is an industrial-application device in glass-filled nylon with back-wired terminals accepting #18-10 AWG. Among heavier-bodied peers, the Eaton industrial armored locking plug is listed extra heavy duty and rated 50A at 600V or 250Vdc with back-wiring, and the Eaton Safety Grip plug is heavy-duty specification grade at 20A 120/208V. The Eaton L6-30 plug is listed commercial grade. The differences are in body construction and the amperage and voltage each device is rated for, so match the circuit first.
11) I have an existing 50A or 600V connection to replace. Does this cover it?
No, 30A is the ceiling on the Cooper L530R family. For higher capacity, the Eaton Industrial Armored locking plug is rated 50A at 600V (250Vdc) and is also back-wired, so wiring practice is familiar if you are standardizing on back-wired devices.
12) Does this Cooper plug come in any color other than black?
Black only across the L530R family. If you color-code cord caps by circuit or voltage on your floor, the Pass & Seymour 267 Series 20A locking plug is offered in yellow, though that is a 20A device and will not substitute on a 30A configuration.
How fast can I get the Cooper Wiring Devices L530-R delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit, reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Cooper Wiring Devices L530-R come with a warranty?
Absolutely. The Cooper Wiring Devices L530-R is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the Cooper Wiring Devices L530-R?
You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
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