Cooper Wiring Devices Back-Wir...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$18.94
Cooper Wiring Devices Back-Wired Locking Plug, California Standard

Cooper Wiring Devices Back-Wired Locking Plug, California Standard

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Model: COO-4720
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$18.94
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Cooper Wiring Devices Back-Wired Locking Plug, California Standard

The Cooper Wiring Devices Locking Plug is a professional-grade locking-style plug engineered to deliver a secure, vibration-resistant power connection for demanding electrical work. It features a back-wiring method that simplifies field termination, and it is manufactured to California standard specifications, making it a solid choice for installations that must satisfy regional code requirements. Electrical contractors and facility maintenance teams rely on locking plugs like this one to maintain a positive, twist-lock connection that resists accidental disconnection from vibration, movement, or incidental contact. As part of the broader Cooper Wiring Devices lineup, this locking plug is built to help ensure consistent, dependable performance on the job site.

Key Features

  • Back-Wiring Method: A back-wired connection design simplifies termination and speeds up field installation.
  • California Standard Compliance: Manufactured to California standard specifications for markets requiring regional code compliance.
  • Locking Plug Design: Twist-lock configuration is intended to provide a secure connection that resists accidental disconnection.
  • Cooper Wiring Devices Build Quality: Backed by the Cooper Wiring Devices brand, known for dependable electrical connection products.
  • Field-Ready Termination: The back-wired approach is designed to help streamline wiring for electricians working under time constraints.
  • Versatile Use: Suitable for commercial, industrial, and light-commercial power connection applications where a locking plug is specified.

Certifications & Compliance

  • California Standard Compliant

Technical Specifications

  • Connection Type: Back Wired
  • Standard: California standard

Typical Applications

  • Commercial and Industrial Electrical Installations
  • Temporary Power and Equipment Connections
  • Locking Plug and Connector Replacement Projects
  • Facilities and Jurisdictions Requiring California Standard Compliance
  • Renovation and New Construction Wiring Projects
  • Maintenance and Retrofit Electrical Work

Why Cooper Wiring Devices?

Cooper Wiring Devices is recognized for delivering reliable, code-oriented electrical connection products for professional use. This Locking Plug reflects that focus with its back-wired termination and California standard compliance, giving electricians, contractors, and facility managers a locking connection solution they can specify with confidence for demanding commercial and industrial applications. Choosing Cooper Wiring Devices means choosing a brand built around consistent quality and dependable field performance.

Manufacturer Resources

Product Specs

Wiring Method:
Back
Standards:
California standard
Product Type:
Locking Plug
Connection Type:
Back Wired
Department:
Electrical
Product Group:
Wiring Devices
Product Subgroup:
Plugs & Connectors

Cooper Wiring Devices COO-4720 – Frequently Asked Questions

1) What part numbers does the Cooper Wiring Devices back-wired locking plug come in?
Four order numbers, each tied to a body color: 3765 in steel, 9965-C in gray, 4720 in black, and L1530PW in yellow. Order by the MPN, not the color alone, since the color is how the four are distinguished.
2) Which locking plug should I use for a 30A 250V two-pole three-wire feed?
The Eaton L530P is a commercial grade L6-30 locking plug, two-pole three-wire, with a nylon body. For 30A 480V three-wire, the Pass and Seymour Turnlok NEMA L8 plug covers that pattern instead, and the Leviton 2341 is an industrial grade polarized plug for 480V three-phase 30A in NEMA L16-30P. The Cooper Wiring Devices plug is identified by its back-wired termination and California standard build rather than by one of these configurations.
3) I need a 125V 15A twist-lock cord cap instead - what should I order?
For a 125V 15A twist-lock, the Bryant 4722N is an angle locking plug in NEMA L5-15P, 15A 125V. The Cooper Wiring Devices plug is a back-wired, California standard locking plug and is not the L5-15P pattern, so the two do not mate with the same receptacle.
4) Is this Cooper locking plug back-wired or does it take screw terminals on the face?
Back-wired. Conductors land from the rear of the plug body, which is the faster termination when you are making up cord ends in the field rather than at a bench.
5) Why is a twist-lock plug specified instead of a straight-blade plug on equipment and temp power?
A locking plug rotates into the connector or receptacle so the blades sit under the retaining lip. That keeps the connection made when the cord gets pulled, walked on, or shaken by equipment vibration. Straight blade plugs pull straight out, which is why temporary power, pumps, compressors, and portable equipment feeds are usually drawn as twist-lock. The Cooper plug is a twist-lock configuration built for that use.
6) What does California standard mean on this Cooper locking plug?
It means the plug is built to California standard specifications, which is what jurisdictions and facility specs in that market call out for wiring devices. If your drawing or AHJ references the California standard for the plug, this one is made to it.
7) Can I use this Cooper locking plug to replace a damaged plug on an existing cord?
Replacement of locking plugs and connectors is one of the intended uses. The back-wired termination means you strip the cord, land the conductors from the rear of the body and reassemble, no face screws. Match the replacement to the same NEMA configuration as the device it plugs into, since a locking plug will only engage its own pin pattern.
8) Is there a heavier-duty alternative to the Cooper back-wired locking plug for industrial equipment?
Yes. The Eaton 7765 is an industrial armored locking plug rated 50A 600V/250Vdc with back-wiring and an extra heavy duty grade, which is the step up for large motor and equipment drops. The Eaton 7411-C Safety Grip plug is a heavy-duty specification grade device at 20A, 120/208V. The Cooper Wiring Devices plug shares the back-wired termination method with the 7765 but is built to California standard specifications.
9) We need a locking plug for wet or dusty outdoor temporary power - is the Cooper back-wired plug the right one?
For dust and moisture exposure, look at the Pass and Seymour 267 Series rubber dust-tight locking plug in yellow, which is built with a rubber dust-tight body for that duty. The Bryant 71020NP is a 7 Series non-metallic locking plug if you want a non-metallic housing. The Cooper Wiring Devices locking plug is a back-wired, California standard device suited to commercial, industrial, and light-commercial power connections and temporary power and equipment connections.
10) Does the color of this Cooper locking plug affect anything besides appearance?
Color is how the four order numbers are separated (steel, gray, black, yellow), and on a jobsite crews commonly use it to tell circuits or voltage groups apart on temp power. Yellow is the one people reach for when a cord end needs to be visible on the floor. The electrical characteristics are set by the plug configuration, not the color.
11) Which of these locking plugs also terminate back-wired?
Among the comparable locking plugs, the Eaton 7765 industrial armored plug is the one that also uses back-wiring, at 50A 600V/250Vdc. The Cooper Wiring Devices plug uses a back-wired connection as well, which is what speeds field termination on both. The Bryant 4722N is an angle-body L5-15P and the Eaton L530P is a nylon-bodied L6-30, which are described by body style and configuration rather than by that termination method.
How fast can I get the Cooper Wiring Devices COO-4720 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 COO-4720 come with a warranty?
Absolutely. The Cooper Wiring Devices COO-4720 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 COO-4720?
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
Why buy the Cooper Wiring Devices COO-4720 from ZenSupply?
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