Cooper Wiring Devices Pro Grip...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$129.94
Cooper Wiring Devices Pro Grip 3-Pole 4-Wire Locking Connector, 50A, Nylon

Cooper Wiring Devices Pro Grip 3-Pole 4-Wire Locking Connector, 50A, Nylon

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Model: 3764EX

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

$129.94
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Cooper Wiring Devices Pro Grip 3-Pole 4-Wire Locking Connector, 50A, Nylon

The Cooper Wiring Devices Pro Grip locking connector is a heavy-duty industrial-grade connector built with a durable Nylon housing and a Pro Grip design for secure handling in demanding environments. Configured as a three-pole, four-wire grounding device with back wiring, this connector is rated 600 Vac / 250 Vdc and 50A, making it suitable for industrial power distribution applications. With a Non-NEMA configuration and support for #10-6 AWG wire and a cord diameter of 0.44 to 1.06 in, it is engineered for dependable field performance.

Key Features

  • Material: Nylon construction provides durable, long-lasting industrial performance.
  • Amperage Rating: 50A rating supports demanding industrial power loads.
  • Voltage Rating: Rated 600 Vac, 250 Vdc for a wide range of industrial power applications.
  • Poles & Wiring: Three-pole, four-wire grounding configuration with back wiring method for secure terminations.
  • Wire Compatibility: Accepts #10-6 AWG wire sizes for flexible field wiring options.
  • Cord Diameter: Accommodates cord diameters from 0.44 to 1.06 in for a secure strain-relief fit.
  • Design Type: Pro Grip design improves grip and handling during connect/disconnect cycles.
  • Configuration: Non-NEMA configuration in Black and red coloring for clear circuit identification.

Technical Specifications

  • Material: Nylon
  • Voltage Rating: 600 Vac, 250 Vdc
  • Wiring Method: Back
  • Number Of Poles: Three-pole
  • Allowable Wire Size: #10-6 AWG
  • Application: Industrial
  • Nema Configuration: Non-NEMA
  • Amperage Rating: 50A
  • Number Of Wires: Four-wire, grounding
  • Color: Black, red
  • Cord Diameter: 0.44 to 1.06 in
  • Design Type: Pro grip

Typical Applications

  • Industrial Power Distribution
  • Heavy-Duty Cord and Plug Connections
  • Three-Phase Equipment Wiring
  • Manufacturing and Plant Floor Installations
  • Temporary and Portable Power Setups

Why Cooper Wiring Devices?

Cooper Wiring Devices builds locking connectors with durable Nylon housings and Pro Grip designs engineered for the demands of industrial environments. With a 50A, 600 Vac / 250 Vdc rating and a three-pole, four-wire grounding configuration, this connector delivers the reliable, code-compliant performance electrical professionals depend on for industrial power connections.

Manufacturer Resources

Product Specs

Voltage Rating:
600 Vac, 250 Vdc
Wiring Method:
Back
Number Of Poles:
Three-pole
Allowable Wire Size:
#10-6 AWG
Application:
Industrial
Nema Configuration:
Non-NEMA
Amperage Rating:
50A
Number Of Wires:
Four-wire, grounding
Cord Diameter:
0.44 to 1.06 in
Design Type:
Pro grip
Product Type:
Locking Connector
Connection Type:
Back Wiring
Product Material:
Nylon
Product Color:
Black, red
Department:
Electrical
Product Group:
Wiring Devices
Product Subgroup:
Plugs & Connectors

Cooper Wiring Devices 3764EX – Frequently Asked Questions

1) What size cord can I terminate in the Cooper 3764EX 50A connector?
It takes cord with an outside diameter of 0.44 to 1.06 inches and conductors from #10 to #6 AWG. At 50 amps you are realistically at the #6 end of that range, so check your cord jacket OD falls under 1.06 inches before you order. Anything smaller than 0.44 inch OD will not clamp properly in the strain relief.
2) What is the closest alternative to the Cooper 3764EX if the equipment cord needs a standard NEMA twist-lock configuration instead of a non-NEMA one?
The Cooper Wiring Devices 3764EX Pro Grip connector is a Non-NEMA configuration, so it only mates with the matching non-NEMA device - it will not accept a standard twist-lock plug. If the opening calls for a catalogued NEMA twist-lock pattern, the Bryant 705 Series locking connector is offered in NEMA twist-lock configurations, and the Bryant 71020NC is a non-metallic NEMA locking connector in the 7 Series. Confirm the exact NEMA pattern on the mating plug before ordering, since the pattern is what determines whether the two halves lock together.
3) For a four-pole five-wire three-phase wye cord, is the Cooper 3764EX the right connector?
No. The Cooper 3764EX Pro Grip is a three-pole four-wire grounding device, which covers three-phase delta or three-wire-plus-ground runs but not a four-pole five-wire wye circuit with a separate neutral. For that arrangement the Leviton 2323 is an industrial grade 5-wire 4-pole locking connector rated 20A, so it suits lighter four-pole loads than the Cooper device's 50A rating.
4) We only need a 30A three-wire locking connector, not 50A - what should we order instead of the Cooper 3764EX?
The Cooper 3764EX is rated 50A, 600 Vac / 250 Vdc with a three-pole four-wire grounding configuration, which is more device than a 30A single-phase circuit needs. For 30A two-pole three-wire work, the Eaton Arrow Hart Ultra Grip L6-30 locking connector is a 30A two-pole three-wire nylon device, and the Leviton 2313 is an industrial grade 125V 30A NEMA L5-30R two-pole three-wire connector. Pick between them on the voltage and pattern the cord is already built to.
5) Is the Leviton 2413 a drop-in replacement for the Cooper 3764EX since both are 3-pole 4-wire?
They share the pole and wire count but not the electrical rating. The Cooper 3764EX is a 3-pole 4-wire grounding connector rated 50A at 600 Vac / 250 Vdc in a Non-NEMA configuration. The Leviton 2413 is an industrial locking connector, 4-wire 3-pole, rated 125/250V. Because the Cooper device is non-NEMA and the Leviton is a 125/250V device, they are not interchangeable on the same cord - match the mating plug and the system voltage rather than the pole count.
6) Is this a connector (female) or a plug? I need the end that goes on the equipment cord.
The 3764EX is a locking connector, the female body that goes on the end of a cord to receive a mating plug. If you need the male end or a flanged inlet for the equipment housing, that is a separate catalog item in the same 50A non-NEMA pattern.
7) Which locking connector should I use for a small 15A single-phase tool drop rather than the Cooper 3764EX?
The Cooper 3764EX is a 50A industrial connector accepting #10-6 AWG conductors and cord diameters from 0.44 to 1.06 in, which is oversized for a light tool drop. The Eaton 7506 is an L1-15 locking connector in black, listed as extra heavy-duty industrial specification grade, and is the right scale for a 15A single-phase cordset.
8) If I need a non-metallic housing on a NEMA locking connector, does the Cooper 3764EX qualify or should I look at the Bryant 71020NC?
The Cooper 3764EX has a nylon housing, which is non-metallic, but its configuration is Non-NEMA. The Bryant 71020NC is a 7 Series non-metallic NEMA locking connector, so it is the one to specify when the drawing calls out both a non-metallic body and a standard NEMA pattern.
9) How are the terminals wired on the Cooper 3764EX, and does that matter for assembly in the field?
Back wiring. Conductors land from the rear of the device, which keeps the terminations behind the body and inside the housing once assembled. Practically, that means you strip and land all four conductors before you close the shell, so leave yourself enough conductor length in the cord to work with.
10) Is a nylon-bodied connector tough enough for plant floor use?
The 3764EX housing is nylon with Cooper's Pro Grip body, and it is rated for industrial application, which is what you want for plant floor and portable power work where the device gets dragged and cycled. Nylon resists impact and the solvents and oils common on a shop floor better than thermoplastic general-purpose bodies.
11) Is there more than one version of the Cooper Pro Grip 50A locking connector to choose from?
One model covers it: 3764EX, nylon, black and red, 50A, 600 Vac / 250 Vdc, three-pole four-wire grounding. There are no finish or amperage options to specify, so order by the part number 3764EX and match it to the mating plug of the same non-NEMA pattern.
12) What is the black and red coloring on this Cooper connector for?
The 3764EX body is black with red, which is Cooper's way of letting crews tell one circuit pattern apart from another at a glance on a plant floor running several voltages or amperages. On a site with mixed 30A and 50A cord sets, that color break is what stops someone forcing the wrong cord into the wrong machine.
How fast can I get the Cooper Wiring Devices 3764EX 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 3764EX come with a warranty?
Absolutely. The Cooper Wiring Devices 3764EX 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 3764EX?
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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