Cooper Wiring Devices Watertig...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$52.76
Cooper Wiring Devices Watertight Locking Connector, NEMA 5-20R

Cooper Wiring Devices Watertight Locking Connector, NEMA 5-20R

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Model: COOP15W33

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

$52.76
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Cooper Wiring Devices Watertight Locking Connector, NEMA 5-20R

The Cooper Wiring Devices Watertight Connector is a two-pole, three-wire grounding connector built for reliable power connections in wet or outdoor environments. Configured to NEMA 5-20R, it is rated 20A at 125V and constructed of rugged thermoplastic for corrosion resistance and long service life. With a cord range of 0.30-0.65" in diameter and nickel-plated contacts, this connector delivers a secure, watertight termination for cord sets used on job sites, in commercial facilities, and in industrial equipment hookups.

Key Features

  • Watertight Design: Special watertight construction protects the connection point from moisture, making it suitable for outdoor and wet-location cord connections.
  • Electrical Rating: Rated 20A at 125V, configured to NEMA 5-20R for compatible two-pole, three-wire grounding connections.
  • Durable Construction: Thermoplastic housing resists corrosion and impact for dependable performance in demanding environments.
  • Wire Compatibility: Accepts #14 to 10 AWG conductors, giving installers flexibility across common cord and cable sizes.
  • Nickel-Plated Contacts: Contact material is nickel-plated for consistent conductivity and long-term reliability.
  • Cord Range: Fits cords measuring 0.30-0.65" in diameter for a secure, snug termination.
  • High-Visibility Yellow: Yellow housing color improves jobsite visibility and helps identify watertight-rated connectors at a glance.

Technical Specifications

  • Amperage Rating: 20A
  • Voltage Rating: 125V
  • NEMA Configuration: 5-20R
  • Number Of Poles: Two-pole
  • Number Of Wires: Three-wire, grounding
  • Allowable Wire Size: #14 to 10 AWG
  • Contact Material: Nickel-plated
  • Cord Range: 0.30-0.65" in diameter
  • Material: Thermoplastic
  • Color: Yellow

Typical Applications

  • Portable Cord Sets and Extension Cord Assemblies
  • Outdoor and Wet-Location Power Connections
  • Commercial and Industrial Equipment Hookups
  • Temporary Power Distribution on Jobsites
  • Construction and Renovation Wiring Projects

Why Cooper Wiring Devices?

Cooper Wiring Devices builds this watertight connector with nickel-plated contacts and a durable thermoplastic housing to withstand the moisture and handling demands of outdoor and industrial power connections. The NEMA 5-20R configuration and 20A, 125V rating give electricians a dependable, code-compatible option for two-pole, three-wire grounding cord connections. Choose Cooper Wiring Devices for consistent, professional-grade performance across commercial and industrial electrical projects.

Manufacturer Resources

Product Specs

Contact Material:
Nickel-plated
Receptacle Type:
Two-pole, three-wire, grounding
Voltage Rating:
125V
Number Of Poles:
Two-pole
Allowable Wire Size:
#14 to 10 AWG
Amperage Rating:
20A
Nema Configuration:
5-20R
Special Features:
Watertight
Cord Range:
0.30-0.65" in diameter
Number Of Wires:
Three-wire
Design Type:
Connector
Product Type:
Locking Connector
Product Material:
Thermoplastic
Product Color:
Yellow
Department:
Electrical
Product Group:
Wiring Devices
Product Subgroup:
Plugs & Connectors

Cooper Wiring Devices COOP15W33 – Frequently Asked Questions

1) What wire gauge can I terminate in the Cooper 15W33 connector?
Terminals take #14 through #10 AWG, which covers the usual 12/3 and 10/3 cord builds for a 20 amp circuit as well as lighter 14 AWG assemblies. It is a two-pole, three-wire grounding device, so you are landing hot, neutral and ground.
2) I need a 20A connector for a 125/250V circuit - is the Cooper 15W33 the right part?
No. The Cooper Wiring Devices 15W33 is a two-pole, three-wire grounding device rated 125V only. For 20A at 125/250V, the Eaton Arrow Hart Ultra-Grip L14-20 connector is a commercial grade locking connector rated 20A 125/250V. The L14-20 carries two hot legs plus neutral and ground, so the feeding cord must have the extra conductor.
3) What is the difference between the Cooper 15W33 and a four-pole or three-pole locking connector?
The 15W33 is a two-pole, three-wire grounding device: one hot, one neutral, one ground, single phase 125V. If the equipment needs two hots, the Leviton 2413 is a four-wire three-pole 125/250V connector, and for 20 amp five-wire four-pole work the Leviton 2323 covers it. Count the conductors in the cord before you pick.
4) Is the Eaton 7506 L1-15 connector a substitute for the Cooper 15W33?
No. The Eaton 7506 is an extra heavy-duty industrial specification grade locking connector in NEMA L1-15, which is a two-wire ungrounded configuration. The Cooper Wiring Devices 15W33 is a two-pole, three-wire grounding connector rated 20A 125V in NEMA 5-20R with watertight construction. If the cord set includes an equipment grounding conductor and the circuit is 20A, the L1-15 device is not the right part.
5) What is the difference between the Cooper 15W33 and the Eaton Ultra Grip L6-30 connector?
Both are two-pole, three-wire locking connectors, but they serve different circuits and are not intermateable. The Cooper Wiring Devices 15W33 is NEMA 5-20R, 20A 125V, with a watertight thermoplastic yellow housing and a 0.30-0.65 inch cord range. The Eaton Arrow Hart Ultra Grip L530C is an L6-30 series two-pole three-wire connector rated 30A in a nylon housing. Choose by the circuit rating and the twist-lock pattern already on the cord.
6) Are the contacts in the Cooper 15W33 plated, and does that matter for outdoor use?
Contacts are nickel-plated. That matters in wet and outdoor service because the plating keeps the mating surfaces from corroding and losing conductivity over repeated plug-and-unplug cycles, which is where an unplated cord connector in a damp location starts heating up.
7) Are there non-metallic alternatives to the Cooper 15W33 locking connector for temporary power?
The Cooper Wiring Devices 15W33 already uses a thermoplastic housing with nickel-plated contacts and accepts #14 to 10 AWG conductors. Bryant also offers non-metallic twist-lock connectors: the Bryant 71020NC is a 7 Series non-metallic NEMA locking connector, and the Bryant 705 Series covers NEMA twist-lock configurations. Match the NEMA configuration and amperage of the circuit when choosing among them, since the Cooper device is specifically 5-20R at 20A 125V.
8) Which connector should I standardize on across a facility if I want one industrial grade device for mixed cord sets?
The Cooper Wiring Devices 15W33 covers 20A 125V two-pole three-wire cord sets in wet locations, with a watertight thermoplastic body. For other circuits in the same facility, Leviton industrial grade locking connectors cover the adjacent configurations: the 2313 for 125V 30A L5-30R, the 2323 for 20A 5-wire 4-pole, and the 2413 for 4-wire 3-pole 125/250V. Each NEMA configuration remains distinct, so standardizing means stocking one device per circuit type rather than one device overall.
9) Why is the Cooper 15W33 connector yellow, and does the color mean anything on a jobsite?
The yellow thermoplastic body is for visibility. On a jobsite it makes the cord end easy to spot in a pile of black devices and gives crews a quick visual cue for which connectors are the watertight ones. It has no bearing on the electrical rating, which is 20A at 125V.
How fast can I get the Cooper Wiring Devices COOP15W33 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 COOP15W33 come with a warranty?
Absolutely. The Cooper Wiring Devices COOP15W33 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 COOP15W33?
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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