Eaton L15-30 Industrial Lockin...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$30.03
Eaton L15-30 Industrial Locking Plug, Three-Pole Four-Wire, 30A 250V

Eaton L15-30 Industrial Locking Plug, Three-Pole Four-Wire, 30A 250V

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Model: L1420-P
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$30.03
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Eaton L15-30 Industrial Locking Plug, Three-Pole Four-Wire

The Eaton L15-30 Industrial Locking Plug is a severe duty locking connector engineered for demanding industrial power connections where a secure, vibration-resistant plug-and-socket connection is required. Rated 30A at 250V, this three-pole, four-wire locking plug accepts #16-12 AWG conductors and uses a back wiring method with Ultra Grip strain relief for a secure, field-installed termination. Built with a thermoplastic face and body, brass contacts, and a commercial device grade, it is designed to perform reliably across an operating temperature range of -20 to 60 °C (-4 to 140 °F), making it well suited to industrial facilities, temporary power setups, and heavy-duty cord and equipment connections.

Key Features

  • Locking Configuration: L15-30 three-pole, four-wire locking plug design for a secure, twist-lock power connection that resists accidental disconnection.
  • Electrical Rating: Rated 30A at 250V with a #16-12 AWG wire range, suited for industrial power circuits and portable equipment feeds.
  • Wiring Method: Back wiring termination paired with Ultra Grip strain relief for a fast, dependable field connection that protects the cord from pull-out and abrasion.
  • Durable Construction: Thermoplastic face and body construction with brass contacts for reliable, long-lasting conductivity and impact resistance.
  • Cord Compatibility: Accommodates cord diameters from 0.25 in to 0.69 in (6.4 mm-17.5 mm) for flexibility across common industrial cordage.
  • Severe-Duty Design: Special severe duty locking connector features built for demanding industrial applications and frequent connect/disconnect cycles.
  • Operating Range: Rated for continuous operation from -20 to 60 °C (-4 to 140 °F), supporting both indoor and rugged industrial environments.
  • Device Grade: Commercial-grade device construction with a standard locking plug design type.

Technical Specifications

  • Refer to manufacturer documentation for complete technical specifications.

Typical Applications

  • Industrial Power Distribution Circuits
  • Portable Power Cord and Equipment Connections
  • Heavy-Duty Machinery and Tooling Power Feeds
  • Temporary Power Setups on Industrial Job Sites
  • Commercial and Industrial Electrical Installations
  • Severe-Duty Locking Connections Requiring Ultra Grip Strain Relief

Why Eaton?

Eaton engineers locking plugs like the L15-30 for severe duty industrial environments, combining a thermoplastic face and body, brass contacts, and Ultra Grip strain relief for a dependable, secure power connection. With a commercial device grade and a wide -20 to 60 °C (-4 to 140 °F) operating range, this locking plug is built to deliver consistent, code-compliant performance across demanding industrial and commercial electrical applications. The back-wiring termination and severe duty locking connector design help ensure a stable connection for equipment that depends on uninterrupted power.

Manufacturer Resources

Product Specs

Number Of Poles:
Three-pole
Device grade:
Commercial
Special features:
Severe duty locking connector
Wiring method:
Back
Application:
Industrial
Operating temperature:
-20 to 60 °C (-4 to 140 °F)
Face/body material:
Thermoplastic
Product Type:
Locking Plug
Product Material:
Thermoplastic
Design type:
Standard locking plug
Cord diameter:
0.25-0.69 in (6.4 mm-17.5 mm)
Contact material:
Brass
Department:
Electrical
Configuration:
L15-30 Three-Pole Four-Wire
Connection Type:
Back Wiring
Voltage Rating:
250V
Amperage Rating:
30A
Product Group:
Wiring Devices
Product Subgroup:
Plugs & Connectors

Eaton L1420-P – Frequently Asked Questions

1) Will the Eaton L15-30 locking plug fit my cord? What cord diameter range does it clamp?
The Ultra Grip strain relief on the Eaton L15-30 plug clamps cord jackets from 0.25 in to 0.69 in (6.4 mm to 17.5 mm), and the terminals take #16-12 AWG conductors. So a typical 12/4 SO or SOOW portable cord lands within range. Anything with a jacket over 0.69 in will not seat in the clamp, and conductors heavier than 12 AWG will not terminate.
2) Is the Eaton L15-30 plug three-phase, and what does three-pole four-wire actually mean for wiring it?
It is an L15-30 three-pole, four-wire configuration: three hot poles plus an equipment ground, rated 30A at 250V. There is no neutral in this pattern, so it feeds 250V three-phase loads only, not 120V line-to-neutral equipment. If you need both 125V and 250V off the same connector you need a four-pole five-wire pattern instead, such as the 125/250V 3-phase Leviton 4-wire locking plug we carry.
3) Which Eaton locking plug do I order, the 20 amp or the 30 amp version?
Two orderable builds: MPN L1530-P in black at 30 amperes, and MPN L1420-P in white at 20 amperes. Match the plug to the receptacle pattern already on the circuit and to the breaker size feeding the cord. The amperage choice also sets the color, so you cannot get a white 30 amp or a black 20 amp.
4) Is the Pass & Seymour L720P Turnlok plug a substitute for the Eaton L15-30?
No. The Pass and Seymour L720P is a Turnlok NEMA L8 locking plug, 3-wire, 480V. The Eaton plug is an L15-30 three-pole four-wire device rated 30A at 250V. Different NEMA pattern, different wire count and a different voltage class, so the two will not mate with the same receptacle.
5) What is the closest equivalent to the Eaton L15-30 locking plug from another brand?
For a 30A 3-phase locking plug, the nearest alternative is the Leviton 2341, an industrial grade polarized locking plug rated 480V 3-phase 30A in a NEMA L16-30P configuration. Note the configuration difference: the Eaton plug is an L15-30 three-pole four-wire device rated 30A at 250V, so the Leviton 2341 is only a drop-in where the receptacle and circuit voltage match its own L16-30 480V pattern. NEMA locking patterns are not interchangeable, so confirm the receptacle face pattern before substituting.
6) I need a 20 amp four-wire locking plug instead of the 30 amp Eaton. What are my options?
The Eaton locking plug is offered in a 20 ampere version as MPN L1420-P in white alongside the 30 ampere L1530-P in black. A four-wire alternative at 20 amps is the Leviton 2411, an industrial grade 4-wire locking plug rated 125/250V 3-phase 20A. Match the NEMA pattern to the receptacle already installed, since a four-wire plug of one pattern will not mate with another.
7) My cord only needs two hot poles at 250V, not three. What should I use instead of the Eaton L15-30 plug?
The Eaton plug is a three-pole device, which is more than a single-phase 250V load needs. For a two-pole 250V connection, the Leviton 2321 is an industrial grade locking plug rated 20A 250V in NEMA L6-20P, and the Leviton 4570-C is an industrial grade 2-pole locking plug rated 250V 15A in NEMA L6-15P. Choose the amperage that matches the branch circuit and the receptacle pattern.
8) Can this Eaton locking plug be used outdoors or in a washdown area?
It is a standard locking plug with a thermoplastic face and body, rated for continuous use from -20 to 60 C (-4 to 140 F). That covers unheated warehouses, outdoor temporary power and rugged industrial spaces, but it is not a dust-tight or watertight device. For hose-down or dusty environments, look at the Pass & Seymour 2675-2675 267 Series rubber dust-tight locking plug instead.
9) How is the Eaton L15-30 plug terminated, and can I wire it in the field?
Back wiring. The conductors land on back-wired terminals inside the plug body, so it is a field-installable cord cap, not a molded plug. Contacts are brass. You strip the cord, land #16-12 AWG conductors, then set the Ultra Grip clamp on the jacket to take the pull off the terminations.
10) The Eaton locking plug is listed as commercial grade. Which comparable plugs are industrial grade?
The Eaton locking plug carries a commercial device grade with severe duty locking connector construction. If a specification calls out industrial grade specifically, the Leviton 2321, Leviton 4570-C, Leviton 2341 and Leviton 2411 locking plugs are all industrial grade. Each covers a different NEMA pattern and rating, so match the configuration to the receptacle rather than selecting on grade alone.
11) I need a locking plug for a wet or dusty area. Does the Eaton L15-30 cover that, or is there a better choice?
The Eaton locking plug has a thermoplastic face and body with brass contacts and is described as a severe duty locking connector, rated for -20 to 60 C (-4 to 140 F). If the application specifically calls for a dust-tight device, the Pass and Seymour 2675 is a 267 Series 20A rubber dust-tight locking plug in yellow. That one is a 20A device, so check it against your circuit rating before specifying it in place of a 30A plug.
12) What is the difference between the Eaton L15-30 locking plug and the Bryant 4722N?
They serve different circuits. The Bryant 4722N is an angle locking plug in NEMA L5-15P rated 15A 125V, a 125 volt general purpose cord plug. The Eaton is an L15-30 three-pole four-wire plug rated 30A at 250V for industrial power circuits, with back wiring termination and Ultra Grip strain relief. The Bryant angle body is also a different physical form, which matters where the cord has to exit flat against a wall.
13) Why use a twist-lock plug instead of a straight blade plug on portable industrial equipment?
On machinery and temporary power, vibration and cord pull drag a straight blade plug out of the receptacle. The L15-30 locking pattern twists into the receptacle so the blades sit behind a shoulder and cannot back out until it is turned loose, and the Ultra Grip clamp keeps cord tension off the terminals. That is the reason it goes on heavy machinery feeds, tool power and job site temporary distribution.
14) Is there a non-metallic alternative to the Eaton L15-30 locking plug?
The Eaton locking plug already uses a thermoplastic face and body with brass contacts, so there is no metal shell to begin with. Another non-metallic option is the Bryant 71020NP, a 7 Series non-metallic locking plug. Confirm its NEMA configuration against your receptacle, since the Eaton device is an L15-30 three-pole four-wire pattern.
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Does the Eaton L1420-P come with a warranty?
Absolutely. The Eaton L1420-P 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 Eaton L1420-P?
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