Cooper Wiring Devices L620C Wa...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$48.06
Cooper Wiring Devices L620C Watertight Locking Receptacle, Nylon

Cooper Wiring Devices L620C Watertight Locking Receptacle, Nylon

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Model: L620-C
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$48.06
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Cooper Wiring Devices L620C Watertight Locking Receptacle, Nylon

The Cooper Wiring Devices L620C Watertight Locking Receptacle is a heavy-duty industrial receptacle built for demanding power connections. Rated 20A at 250V, this nylon-bodied device features an ultra grip design for secure plug retention and is engineered for industrial applications where reliable, watertight electrical connections are required. This receptacle is offered as a configurable family, available in Black or White housing colors and in 2-pole or 3-pole configurations, so installers can match the exact locking device needed for a given circuit while relying on the same dependable 20A, 250V nylon construction across every option. Back-wired for simplified termination, it accepts an allowable wire size of #18-10 AWG, making it a versatile choice for professional electrical installations.

Key Features

  • Amperage Rating: 20A for reliable industrial power delivery.
  • Voltage Rating: 250V, suited for demanding industrial power systems.
  • Durable Construction: Nylon housing provides impact and chemical resistance for long-term industrial use.
  • Wiring Method: Back wiring allows for secure, simplified terminations during installation.
  • Allowable Wire Size: Accepts #18-10 AWG wire for flexible conductor compatibility.
  • Design Type: Ultra grip design ensures a secure, locking plug connection that resists accidental disconnection.
  • Color Options: Available in Black or White nylon housing to match installation requirements.
  • Pole Configuration: Offered in 2-pole and 3-pole versions to suit different circuit configurations.
  • Application: Designed for industrial environments requiring a watertight, locking electrical connection.

Technical Specifications

  • Material: Nylon
  • Voltage Rating: 250V
  • Wiring Method: Back
  • Allowable Wire Size: #18-10 AWG
  • Application: Industrial
  • Amperage Rating: 20A
  • Design Type: Ultra grip
  • Color Options: Black, White
  • Pole Options: 2, 3

Typical Applications

  • Industrial Power Distribution Systems
  • Heavy Machinery and Equipment Power Connections
  • Portable and Temporary Power Setups
  • Locking Plug and Receptacle Power Connections
  • Renovation and New Construction Electrical Work

Why Cooper Wiring Devices?

Cooper Wiring Devices builds this locking receptacle with a durable nylon housing and an ultra grip design engineered for the rigors of industrial use. With a 20A, 250V rating and back-wiring for #18-10 AWG conductors, it delivers dependable, code-compliant performance for professional electrical installations, no matter which color or pole configuration you select.

Manufacturer Resources

Product Specs

Voltage Rating:
250V
Wiring Method:
Back
Allowable Wire Size:
#18-10 AWG
Application:
Industrial
Amperage Rating:
20A
Design Type:
Ultra grip
Product Type:
Locking Receptacle
Product Material:
Nylon
Department:
Electrical
Product Group:
Wiring Devices
Connection Type:
Back Wire
Product Subgroup:
Receptacles & Outlets

Cooper Wiring Devices L620-C – Frequently Asked Questions

1) What wire sizes will the Cooper L620C locking receptacle terminate?
Terminations take #18-10 AWG conductors, and it's a back-wired device, so the conductors land on the back of the body rather than under side screws. That range covers typical 20A branch circuit wiring in 12 AWG with room to go heavier to 10 AWG for voltage-drop runs.
2) What is the difference between the 2-pole and 3-pole versions of the Cooper L620C receptacle?
Two part numbers cover it. The 2-pole device is the L620-C, supplied in white. The 3-pole device is the L1520-C, supplied in black. Both are rated 20A at 250V with nylon bodies. Pick the 2-pole for a single-phase 250V circuit and the 3-pole where the equipment needs three ungrounded conductors. Order by the part number, since the pole count and the color are tied together.
3) Is the Cooper L620C a twist-lock receptacle, and will a standard straight-blade cord cap plug into it?
It's a locking receptacle with an ultra grip design, so the plug inserts and twists to lock and resists being pulled loose by cord drag or vibration. A straight-blade plug will not work in it. You need a matching locking cord cap for the same pole and wire configuration, which means the cord set has to match the device you order (L620-C for 2-pole, L1520-C for 3-pole).
4) What should I use instead of the Cooper L620C when the circuit is 125/250V and needs a neutral plus ground?
The Cooper L620C is a 20A 250V locking receptacle, so a straight 250V two-pole circuit is its home. For a 125/250V four-wire opening, the Leviton 2410 is an industrial grade flush mount locking receptacle rated 20A 125/250V in the NEMA L14-20R pattern, and the Eaton L1420-R is an industrial locking receptacle in the L14-20 pattern with a black nylon body. Both carry the neutral the L620C configuration does not.
5) Is there a locking receptacle equivalent to the Cooper L620C for a 277/480V three-phase circuit?
No - the Cooper L620C is built for 250V service at 20A. For three-phase wye power at the same 20A, the Leviton 2450 is an industrial grade 4-wire, 4-pole single locking receptacle rated 277/480V Y AC, 20A. Wiring pattern and pole count differ from the L620C, so the mating plugs are not interchangeable.
6) Can I get the Cooper L620C locking receptacle in black with 2 poles?
No. The color and pole count are not independent choices on this device. Black comes as the 3-pole L1520-C, and white comes as the 2-pole L620-C. If you need 2-pole, you are getting white.
7) Will a nylon locking receptacle hold up in a wash-down or chemical plant area?
Nylon is the reason to pick this one. The L620C body is nylon rather than thermoplastic or phenolic, which gives it impact and chemical resistance for industrial duty, and the device is built for watertight locking connections. If you need a flanged outlet body to mate with a watertight cover assembly, the Bryant 71020ER is a flanged locking receptacle in our line.
8) What is the closest industrial-grade alternative to the Cooper L620C locking receptacle?
The Leviton 2420 is an industrial grade flush mount locking receptacle with an impact- and chemical-resistant body, which lines up with the Cooper L620C's nylon housing chosen for industrial service. The Leviton 2510 is likewise an industrial grade flush mount locking receptacle. Confirm the NEMA configuration of the mating plug before swapping, since the Cooper is sold in 2-pole and 3-pole versions.
9) I need a flanged locking receptacle for a machine enclosure - does the Cooper L620C work or should I use something else?
The Cooper L620C is a watertight locking receptacle with a nylon body and back-wire terminations for #18-10 AWG. If the application calls specifically for a flanged inlet-style device mounted to equipment, the Bryant 71020ER is a 7 Series flanged locking receptacle built for that mounting style.
10) Can I substitute an Eaton L1-15 locking receptacle for the Cooper L620C?
No. The Eaton 7540 is a NEMA L1-15 locking receptacle in commercial grade, a 15A 125V two-wire configuration, while the Cooper L620C is rated 20A at 250V. The locking patterns do not mate and the voltage class is different, so it is not a drop-in.
11) Is the Cooper L620C locking receptacle suitable for temporary and portable power on a jobsite?
Yes, that's one of its intended uses, along with heavy machinery connections and industrial power distribution. The twist-lock action keeps cord sets from dropping out when equipment moves, and the nylon body takes jobsite abuse. Keep in mind the 250V rating means it is not for 120V tool circuits.
12) We're standardizing locking receptacles across a facility. Can I mix Cooper L620C devices with other brands on the same circuits?
The device configuration, not the brand, is what has to match. A Cooper L620-C 2-pole 250V device accepts any cord cap of the same configuration regardless of who made it. Where you want everything on one brand, the comparable industrial grade locking receptacles we carry include Leviton's 2420 and 2510 and Eaton's L14-20, each in its own voltage and pole configuration, so match the configuration first and the brand second.
How fast can I get the Cooper Wiring Devices L620-C 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 L620-C come with a warranty?
Absolutely. The Cooper Wiring Devices L620-C 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 L620-C?
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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