Cooper Wiring Devices CS Armor...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$135.93
Cooper Wiring Devices CS Armored Locking Plug, 50A Non-NEMA

Cooper Wiring Devices CS Armored Locking Plug, 50A Non-NEMA

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Model: CS8265

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

$135.93
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Cooper Wiring Devices CS Armored Locking Plug, 50A Non-NEMA

The Cooper Wiring Devices Armored Locking Plug is a heavy-duty, 50A rated power connector engineered for demanding industrial applications. This family is available in configurations spanning 2 or 3 poles and voltage ratings from 250 volts to 480 volts, giving electrical professionals flexibility to match the plug to the exact circuit requirements of the installation. Featuring a Non-NEMA configuration, back-wired terminals, and an armored design type, this plug accommodates #10-6 AWG conductors and cord diameters from 0.68 to 1.13 in, making it well suited for rugged industrial power distribution where durability and a secure connection are essential. Finished in steel and built to California standard requirements, it delivers dependable performance for professional electrical installations across a range of pole and voltage combinations.

Key Features

  • Amperage Rating: Rated for 50A, supporting heavy industrial power loads across the full pole and voltage range.
  • Pole Configuration: Available in 2-pole or 3-pole versions to fit specific circuit requirements.
  • Voltage Range: Offered in 250 volt or 480 volt ratings, letting installers select the correct option for the application.
  • Wiring Method: Back-wired terminals for a secure, reliable connection.
  • Allowable Wire Size: Accommodates #10-6 AWG conductors for flexible field wiring.
  • Design Type: Armored construction built to withstand demanding industrial environments.
  • Cord Diameter: Accepts cords ranging from 0.68 to 1.13 in for compatible cordset flexibility.
  • NEMA Configuration: Non-NEMA design tailored to specialized industrial connection requirements.
  • Finish: Steel color finish for a durable, professional appearance.

Technical Specifications

  • Amperage Rating: 50A
  • Number of Poles Available: 2, 3
  • Voltage: 250 volts, 480 volts
  • Wiring Method: Back
  • Allowable Wire Size: #10-6 AWG
  • Standard: California standard
  • Application: Industrial
  • Nema Configuration: Non-NEMA
  • Color: Steel
  • Cord Diameter: 0.68 to 1.13 in
  • Design Type: Armored

Typical Applications

  • Industrial Power Distribution
  • Heavy-Duty Equipment and Machinery Connections
  • Back-Wired Plug Installations Requiring #10-6 AWG Conductors
  • Industrial Facilities Governed by California Standard Requirements
  • Non-NEMA Specialized Industrial Power Applications Across Multiple Pole and Voltage Configurations

Why Cooper Wiring Devices?

Cooper Wiring Devices builds this Armored Locking Plug for the rigors of industrial power connections, combining a 50A rating, back-wired terminals, and armored construction to deliver a dependable, code-conscious solution for professional electrical work. With support for #10-6 AWG wire sizes, cord diameters from 0.68 to 1.13 in, and a choice of 2-pole or 3-pole configurations at 250 volts or 480 volts, it's designed to hold up under demanding industrial conditions while meeting California standard requirements.

Manufacturer Resources

Product Specs

Wiring Method:
Back
Allowable Wire Size:
#10-6 AWG
Standards:
California standard
Application:
Industrial
Nema Configuration:
Non-NEMA
Amperage Rating:
50A
Cord Diameter:
0.68 to 1.13 in
Design Type:
Armored
Product Type:
Locking Plug
Connection Type:
Back Wired
Product Color:
Steel
Department:
Electrical
Product Group:
Wiring Devices
Voltage Rating:
250V - 480V
Configuration:
Non-NEMA
Finish:
Steel
Product Subgroup:
Plugs & Connectors

Cooper Wiring Devices CS8265 – Frequently Asked Questions

1) Which Cooper CS series locking plug do I order for 480V three-phase versus 250V single-phase?
Three configurations are offered on the Cooper armored 50A locking plug. The CS8165 is 3-pole at 480 volts, the CS8465 is 2-pole at 480 volts, and the CS8265 is 2-pole at 250 volts. All three are 50A. Match the pole count and voltage to the equipment cord and the mating receptacle before ordering, since the bodies are not interchangeable across configurations.
2) Will a Cooper CS8265 or CS8365 plug mate with a standard NEMA twist-lock receptacle?
No. The Cooper armored 50A locking plug is a Non-NEMA configuration, so it will not mate with standard NEMA twist-lock devices like an L6-30 or L16-30. It only connects to the matching CS-series receptacle or connector of the same pole count and voltage. If you need a NEMA-configured device instead, look at something like the Leviton NEMA L16-30P 30A 480V 3-phase locking plug.
3) What size cord and conductors can I land in this Cooper 50A armored locking plug?
Terminals take #10 through #6 AWG conductors, and the cord grip accepts an outer cord diameter of 0.68 to 1.13 inches. A cord jacket thinner or fatter than that range will not clamp properly, so size the SO or SOOW cord to land inside the window. Wiring is back-wired.
4) What is the closest equivalent to the Cooper CS8165 armored locking plug from another manufacturer?
The Eaton 7765 Industrial Armored Locking Plug is the nearest match. It is also a 50A armored locking plug with back-wiring, rated 600V/250Vdc, and carries an Extra Heavy Duty grade. The Cooper armored locking plug is likewise rated 50A with back-wired terminals and armored construction, offered in 2-pole 250V, 2-pole 480V, and 3-pole 480V builds. Confirm pole count and voltage against the equipment cordset before swapping.
5) Is an armored locking plug worth it over a non-metallic body for shop floor equipment?
Armored is the right pick where the cordset gets dragged, dropped, or run over. The Cooper CS plug uses an armored design type with a steel finish, rated industrial duty. A non-metallic body such as the Bryant 71020NP 7 Series plug is lighter and non-conductive but does not give you the same impact protection on a trailing cord.
6) Does this Cooper plug meet California requirements for an industrial install?
The armored 50A locking plug is built to California standard requirements, which is what the CS designation reflects. That is the only standard carried on the record for it, so specify it where the drawing calls for a California-standard 50A pin-and-sleeve style locking device.
7) Can I use this 50A Cooper locking plug on a 20A or 30A branch circuit cordset?
It is a 50A device, so it is oversized for a 20A or 30A load and will not mate with those smaller receptacles anyway. For 20A 250V work use a NEMA L6-20P device like the Leviton industrial grade locking plug; for 30A 250V, an Eaton L6-30 plug. Those are standard NEMA and widely stocked as receptacle pairs.
8) Will a Leviton L6-20P or L6-15P plug work in place of the Cooper 50A locking plug?
No. The Leviton 2321 is a NEMA L6-20P rated 20A 250V and the Leviton 4570-C is a NEMA L6-15P 2-pole rated 15A 250V - both are standard NEMA locking configurations at far lower amperage. The Cooper armored plug is a 50A Non-NEMA device accepting #10-6 AWG conductors. The blade patterns do not interchange and the ampacity is not comparable. Use the L6 devices only where the receptacle is an L6-15R or L6-20R.
9) What is a lighter-duty alternative to the armored Cooper locking plug for a portable tool cord?
For portable 120/208V tool cords, the Eaton 7411-C Safety Grip locking plug is rated 20A and built to a heavy-duty specification grade, and the Bryant 71020NP is a 7 Series non-metallic locking plug. Both are far lighter assemblies than the Cooper plug, which uses armored construction with a steel finish and accepts cords from 0.68 to 1.13 in for industrial power distribution. Pick the Cooper body where the cord diameter and 50A load demand it.
10) For a 4-wire 3-phase drop, does the Cooper armored plug apply or should I look elsewhere?
The Cooper armored locking plug is built in 2-pole 250V, 2-pole 480V, and 3-pole 480V configurations at 50A. For a lower-amperage 4-wire 3-phase drop, the Leviton 2411 is an industrial grade 4-wire locking plug rated 125/250V 3-phase at 20A. Match the pole and wire count to the receptacle already on the panel or machine before ordering either.
11) Does the 3-pole CS8165 include a ground, and how many wires do I run?
Pole count and wire count are not the same thing. The CS8165 is listed as 3 poles at 480 volts and the CS8265 and CS8465 as 2 poles. Run one conductor per pole plus the equipment grounding conductor, all landed on the back-wired terminals in #10 to #6 AWG.
12) What is the difference between the Cooper armored 50A plug and a Bryant 4722N angle plug?
The Bryant 4722N is an angle locking plug in the NEMA L5-15P configuration rated 15A 125V, used for 125V branch circuit cord connections. The Cooper armored plug is a straight-body 50A Non-NEMA industrial device with back-wired terminals and a #10-6 AWG wire range, built to California standard requirements. They serve entirely different circuits and are not interchangeable.
How fast can I get the Cooper Wiring Devices CS8265 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 CS8265 come with a warranty?
Absolutely. The Cooper Wiring Devices CS8265 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 CS8265?
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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